Finance
45 calculators🏠 Mortgages & Home 5
Mortgage Calculator
Calculate monthly mortgage payments, total interest paid, and full amortization schedule. Includes PMI, taxes, insurance, and extra payment analysis.
Home Affordability Calculator
Find out how much house you can afford based on income, debts, down payment, and current interest rates. Uses standard 28/36 debt-to-income guidelines.
Home Equity Calculator
Calculate your home equity, LTV ratio, and how much you can borrow through a HELOC or cash-out refinance. Includes equity growth projector and side-by-side access options comparison.
Mortgage Refinance Calculator
Calculate whether refinancing makes financial sense. See your break-even point, monthly savings, and total interest savings over the life of the new loan.
Amortization Calculator
Generate a complete amortization schedule for any loan. See exactly how much goes to principal vs. interest each month and the impact of extra payments.
💳 Loans & Credit 8
Loan Calculator
Calculate monthly payments, total interest, and full loan summary for any loan amount, interest rate, and term. Works for personal loans, car loans, and more.
Auto Loan Calculator
Calculate your car loan monthly payment, total interest, and true cost of ownership. Includes trade-in value and down payment options.
Loan Payment Calculator
Calculate the exact monthly payment for any loan. Enter amount, rate, and term to get your payment, total interest, and payoff date instantly.
Loan Comparison Calculator
Compare two loan offers side by side. See the true cost difference between varying interest rates, terms, and fees to make the best borrowing decision.
APR Calculator
Calculate the true Annual Percentage Rate of any loan including fees and points. Compare the real cost of loans with different fee structures.
Student Loan Calculator
Calculate student loan monthly payments and total interest under standard, graduated, and income-driven repayment plans. Includes refinancing analysis.
Business Loan Payoff Calculator
Calculate how long to pay off your business loan and how much interest you'll save by making extra payments. Compare payoff strategies side by side.
Lease Calculator
Calculate monthly lease payments for vehicles or equipment. Includes money factor, residual value, capitalized cost reduction, and total lease cost.
⚖️ Debt & Budgeting 5
Debt Payoff Calculator
Calculate how long to pay off all your debts using avalanche (highest interest first) or snowball (smallest balance first) strategies. See your debt-free date.
Credit Card Payoff Calculator
Calculate how long to pay off your credit card balance and how much interest you'll pay. See the dramatic difference extra monthly payments make.
Debt-to-Income Ratio Calculator
Calculate your DTI ratio and see if you qualify for a mortgage or other loans. Includes front-end and back-end DTI with lender guideline thresholds.
Budget Calculator
Create and analyze your monthly budget using the 50/30/20 rule or custom allocations. Track income vs expenses and identify areas to cut spending.
Emergency Fund Calculator
Calculate your ideal emergency fund size based on your expenses, job stability, and risk factors. Includes a savings plan and HYSA interest projections.
📈 Savings & Investing 6
Dividend Calculator
Calculate dividend income, project DRIP reinvestment growth, and compare stocks by yield.
CD Calculator
Calculate Certificate of Deposit earnings, build a CD ladder, and compare CDs vs high-yield savings accounts.
Compound Interest Calculator
See how compound interest grows your money over time. Includes regular contributions, different compounding frequencies, and an interactive growth chart.
Investment Return Calculator
Calculate your investment return including CAGR, total return, and annualized return. Compare your portfolio performance against benchmarks.
Savings Calculator
Calculate how your savings will grow with regular contributions and compound interest. See how long to reach any savings goal.
Savings Goal Calculator
Calculate exactly how much to save each month to reach any financial goal by a target date. Works for emergency funds, vacations, down payments, and more.
Net Worth Calculator
Calculate your total net worth by tallying all assets and liabilities. Track your financial progress and see how you compare by age group.
Inflation Calculator
Calculate the inflation-adjusted value of money over any time period. See how purchasing power changes and what future prices might look like.
🏖️ Retirement & Insurance 4
Social Security Calculator
Estimate benefits at 62, 67, and 70. Find your break-even age and calculate spousal benefits.
Retirement Calculator
Calculate if you're on track for retirement. Enter your age, savings, contributions, and goals to see your projected retirement balance and monthly income.
401k Calculator
Calculate your 401k balance at retirement, employer match, and tax savings. Compare traditional vs Roth 401k. See exactly how much free money you're leaving on the table. 2026 IRS limits.
HSA Calculator
Calculate your HSA triple tax advantage — federal savings, state savings, and FICA savings in one view. Includes investment growth projector, retirement healthcare cost estimator, and HSA vs FSA comparison. 2026 IRS limits.
Life Insurance Calculator
Calculate how much life insurance coverage you need based on income, debts, dependents, and future expenses. Compare term vs whole life cost estimates.
🧾 Taxes & Payroll 6
Sales Tax Calculator
Calculate sales tax for any purchase in any US state. Includes reverse sales tax calculator to find the pre-tax price from a total with tax included.
Capital Gains Calculator
Calculate short-term and long-term capital gains tax on stocks, real estate, and other investments. Includes state tax and Net Investment Income Tax.
Crypto Tax Calculator
Calculate capital gains tax on cryptocurrency trades. Supports FIFO, LIFO, and specific identification methods for short-term and long-term gains.
Freelance Tax Estimator
Estimate self-employment tax, quarterly tax payments, and total tax liability for freelancers and self-employed workers. Includes deductions guide.
Salary Calculator
Convert salary between hourly, daily, weekly, monthly, and annual rates. Includes after-tax income estimate and cost-of-living comparison by city.
Paycheck Calculator
Calculate your net take-home pay after federal and state income tax, Social Security, Medicare, and other deductions for any pay period.
🏢 Business & Other 6
Roth IRA Calculator
Project your Roth IRA balance at retirement, check eligibility, and compare Roth vs Traditional IRA.
Break-Even Calculator
Find the exact sales volume where revenue covers all costs. Model target profits, compare pricing scenarios, and see your margin of safety.
eCommerce Profit Margin Calculator
Calculate gross and net profit margins for eCommerce products. Includes COGS, shipping, platform fees, advertising, and returns to find true profitability.
SaaS Churn & ROI Calculator
Calculate MRR, churn rate, customer lifetime value, and CAC payback period for SaaS businesses. Essential metrics for subscription business health.
LLC Formation Cost Calculator
Estimate the total cost to form an LLC in any US state. Includes state filing fees, registered agent fees, operating agreement, and annual costs.
Fuel Cost Calculator
Calculate fuel costs for any trip or vehicle. Compare fuel efficiency between vehicles and estimate annual fuel spend based on your mileage.
Solar ROI Calculator
Calculate the return on investment for residential solar panels. Includes federal tax credit, utility savings, payback period, and 25-year savings projection.
Discount Calculator
Calculate sale prices, discount percentages, and savings amounts for any purchase. Includes reverse discount calculator and stacked discount scenarios.
Health & Fitness
20 calculators📏 Body Metrics 5
BMI Calculator
Calculate your Body Mass Index and see where you fall on the weight scale. Includes BMI chart and healthy weight range for your height.
Body Fat Calculator
Estimate your body fat percentage using the US Navy method. Enter neck, waist, and hip measurements to get your body fat and lean mass estimates.
Ideal Weight Calculator
Find your ideal body weight range based on height, gender, and frame size using multiple established formulas including Hamwi, Devine, and Robinson.
BMR Calculator
Calculate your Basal Metabolic Rate and TDEE by activity level using the most accurate formulas available.
Biological Age Calculator
Estimate your biological age based on lifestyle factors including exercise, sleep, diet, stress, and habits.
Water Intake Calculator
Calculate your recommended daily water intake based on weight, activity level, and climate. Includes hydration tips and how to track your daily intake.
🥗 Nutrition & Calories 6
Calorie Calculator
Calculate your daily calorie needs based on age, height, weight, and activity level. Includes calorie targets for weight loss, maintenance, and muscle gain.
Calorie Deficit Calculator
Calculate exactly how many calories to eat to lose weight. Get your personalized daily calorie target, projected goal date, weight loss timeline, and ideal macros.
TDEE Calculator
Calculate your Total Daily Energy Expenditure — the exact number of calories your body burns each day. Essential for accurate weight management and diet planning.
Calorie Burn Calculator
Calculate how many calories you burn during any exercise or activity using MET values. Covers 50+ activities from walking and running to swimming and cycling.
Macro Calculator
Calculate your ideal protein, carbohydrate, and fat targets based on your goals. Supports weight loss, muscle gain, maintenance, and keto macros.
Protein Calculator
Calculate your daily protein needs based on weight, activity level, and fitness goals. Includes high-protein food sources and meal planning tips.
💪 Fitness & Performance 4
Pace Calculator
Calculate your running or walking pace, finish time, or distance. Convert between min/mile and min/km. Includes pace charts for common race distances.
One Rep Max Calculator
Calculate your one-rep maximum for any lift using multiple established formulas. Includes percentage-based training weight recommendations.
Intermittent Fasting Calculator
Plan your intermittent fasting schedule with eating and fasting windows for 16:8, 18:6, 5:2, and other popular IF protocols.
Sleep Calculator
Find the best bedtime or wake-up time based on sleep cycles. Calculate optimal wake times to feel refreshed.
🤰 Women's Health 2
Pregnancy Calculator
Calculate your due date, current week of pregnancy, and key milestones from your last menstrual period or conception date.
Ovulation Calculator
Calculate your ovulation date and fertile window based on your cycle length. Includes a fertility calendar and ovulation tracking tips.
🍷 Lifestyle 2
BAC Calculator
Calculate your Blood Alcohol Content using the Widmark formula. See your current BAC, when you'll be under the legal limit, and how long until sober.
Alcohol Calorie Calculator
Calculate calories in beer, wine, cocktails, and spirits. See how alcohol fits your daily calorie budget, how long to burn it off, and a full drinks calorie chart.
Math
17 calculators🔢 Basic Math 6
Percentage Calculator
Calculate percentages instantly — what is X% of Y, what percent is X of Y, and percentage increase or decrease. Works for tips, discounts, grades, and more.
Percentage Change Calculator
Calculate percentage increase, decrease, or difference between two numbers. Includes a reverse calculator to find original values, and a multi-period tracker for revenue, stock prices, and test scores.
Fraction Calculator
Add, subtract, multiply, and divide fractions with step-by-step solutions. Includes mixed numbers, improper fractions, and automatic simplification.
Simplify Fractions Calculator
Reduce any fraction to its simplest form instantly. Shows the GCD used and all simplification steps. Also converts to mixed numbers and decimals.
Ratio Calculator
Simplify ratios, solve ratio proportions, and scale ratios up or down. Works for recipes, maps, blueprints, and any proportional relationship.
Roman Numeral Converter
Convert any number to Roman numerals or Roman numerals to numbers instantly. Includes date converter for tattoos and inscriptions, year lookup, and full reference chart.
🔬 Advanced & Scientific 5
Scientific Calculator
Full-featured scientific calculator with trigonometry, logarithms, exponents, roots, memory functions, and more. Works on all devices.
Graphing Calculator
Plot equations and functions on an interactive graph. Supports multiple functions, zoom, and trace. Great for algebra and calculus visualization.
Algebra Calculator
Solve linear and quadratic equations step by step. Enter any equation and get the solution with a full explanation of each step.
Exponent Calculator
Calculate any base raised to any power, including negative and fractional exponents. Includes scientific notation conversion and step-by-step breakdown.
Square Root Calculator
Calculate square roots, cube roots, and nth roots of any number. Shows simplified radical form and decimal approximation to any precision.
📊 Statistics 2
Standard Deviation Calculator
Calculate mean, median, mode, variance, and standard deviation for any data set. Enter values separated by commas and get full statistics with step-by-step work.
Random Number Generator
Generate truly random numbers in any range. Supports integers, decimals, multiple numbers, and unique sets. Great for games, lotteries, and sampling.
📐 Geometry 2
Triangle Calculator
Solve any triangle — SSS, SAS, ASA, AAS, and the ambiguous SSA case. Find sides, angles, area, perimeter, and height using Law of Sines and Cosines, with step-by-step solutions and a triangle diagram.
Speed Distance Time Calculator
Solve for speed, distance, or time — enter any two values and get the third instantly. Includes unit conversion between mph, km/h, knots and more, plus real-world reference examples for driving, running, and flying.
🎓 School & Grades 2
Grade Calculator
Calculate your current grade based on assignments, tests, and weighted categories. Find out exactly what score you need on your final exam to reach your target grade.
GPA Calculator
Calculate your GPA for a single semester or cumulative across all semesters. Supports 4.0 and weighted grading scales with customizable credit hours.
Everyday
17 calculators🏠 Home & Living 4
Home Renovation Cost Estimator
Estimate costs for any renovation — kitchen, bathroom, roof, deck, HVAC, and more. Edit every line item with your own quotes, plan your full project list with a budget tracker, and see exactly how much you save going DIY vs hiring a contractor.
Rent vs Buy Calculator
Compare the true long-term costs of renting versus buying a home. Includes appreciation, maintenance, tax benefits, and opportunity cost of your down payment.
Moving Cost Calculator
Estimate the total cost of your move including movers, truck rental, packing supplies, travel, and setup costs. Plan your moving budget with confidence.
Recipe Converter
Scale any recipe up or down instantly. Convert servings, adjust ingredient quantities, and convert between US and metric measurements for any dish.
🍽️ Food & Dining 2
Tip Calculator
Calculate the perfect tip for any bill. Split the check between multiple people, set a custom tip percentage, and see exactly what each person owes including tax.
Bill Splitter Calculator
Split any bill evenly, by percentage, or by individual item. Add tip and tax, name everyone in the group, and get a clear breakdown of exactly what each person owes.
🚗 Automotive 2
Car Lease vs Buy Calculator
Compare the total cost of leasing versus buying a car. Includes monthly payments, total cost of ownership, equity, and break-even analysis.
MPG Calculator
Calculate your car's gas mileage, fuel cost per mile, and annual fuel spend. Compare two vehicles side by side and plan road trip costs with the built-in trip cost calculator.
👨👩👧 Family & Pets 4
Baby Cost Calculator
Estimate first-year baby costs including gear, feeding, childcare, healthcare, and clothing. Includes a childcare planner and college savings estimator.
Dog Cost Calculator
Calculate the true lifetime cost of owning a dog. Covers food, vet care, grooming, boarding, supplies, and training by breed size and life stage.
Cat Cost Calculator
Calculate the full cost of owning a cat over their lifetime. Includes food, vet care, litter, toys, boarding, and pet insurance estimates.
Wedding Cost Calculator
Estimate total wedding costs by guest count and style. Covers venue, catering, photography, flowers, music, attire, and more. Includes a savings planner.
✈️ Travel & Leisure 1
🛠️ Work & Tools 3
Time Card Calculator
Calculate hours worked from clock-in and clock-out times. Handles overnight shifts, breaks, overtime, and double time. Three-rule OT calculator with full pay summary. Export your timesheet as .txt.
Unit Price Calculator
Compare up to 6 products to find the best value instantly. See price per ounce, pound, liter, or any unit. Includes bulk savings analysis and receipt checker.
Coin Flip
3D animated coin flip with streaks, multi-coin, stats, and confetti. Let fate decide in style.
Password Generator
Generate strong, secure random passwords of any length. Choose character sets, avoid ambiguous characters, and check password strength with entropy scoring.
Construction
17 calculators🏗️ Concrete & Foundation 2
Concrete Calculator
Calculate how many cubic yards or bags of concrete you need for slabs, footings, columns, and walls. Includes a waste factor and cost estimate.
Concrete Block Calculator
Calculate how many CMU concrete blocks you need for walls, foundations, retaining walls, and landscaping. Includes mortar, grout, rebar, and full cost estimates. 8 block sizes.
🪵 Structural & Exterior 5
Deck Calculator
Calculate deck boards, framing lumber, fasteners, and total material cost. Supports multiple decking patterns and includes a 10-year cost of ownership comparison.
Stair Calculator
Calculate rise, run, number of steps, stringer length, and all materials needed. Checks IRC building code compliance automatically. Includes a visual stair diagram.
Fence Calculator
Calculate fence posts, rails, pickets, concrete, and total cost for wood, chain link, and vinyl fences. Enter your yard dimensions and get a complete material list.
Roofing Calculator
Calculate roofing squares, shingles, felt underlayment, and ridge cap for any roof pitch and size. Covers gable, hip, and shed roofs with material cost estimates.
Board Foot Calculator
Calculate board feet of lumber for any project. Enter thickness, width, and length for individual boards or a full lumber list with cost per board foot.
🎨 Interior Finishes 5
Tile Calculator
Calculate how many tiles you need for floors, walls, and backsplashes. Supports multiple tile sizes, includes grout and adhesive estimates, and shows cost per square foot.
Paint Calculator
Calculate how many gallons of paint you need for any room, exterior, or surface. Accounts for doors, windows, coats, and waste. Includes a cost estimator by paint quality.
Drywall Calculator
Calculate the number of drywall sheets, screws, joint compound, and tape needed for any room. Supports standard and custom sheet sizes with waste factor.
Insulation Calculator
Calculate how much insulation you need by R-value, area, and type. Covers batts, blown-in, spray foam, and rigid board with climate zone recommendations.
Flooring Calculator
Calculate how much flooring you need for any room. Covers hardwood, laminate, vinyl plank, tile, and carpet with material-specific waste factors, underlayment, and full cost estimates.
🌿 Landscaping & Outdoor 3
Gravel Calculator
Calculate tons or cubic yards of gravel, crushed stone, sand, or fill dirt for driveways, pathways, and landscaping projects. Includes delivery cost estimate.
Mulch Calculator
Calculate cubic yards or bags of mulch needed for garden beds, landscaping, and playgrounds. Enter area dimensions and desired depth for an instant result.
Pool Volume Calculator
Calculate your pool volume in gallons and liters for rectangular, round, oval, or kidney shapes. Includes exact chemical dosing for opening, maintenance, algae treatment, and closing — plus a full annual cost estimator.
Conversions
10 calculators📏 Measurements 5
Length Converter
Convert between inches, feet, yards, miles, centimeters, meters, and kilometers. Includes a full length reference chart for common measurements.
Weight Converter
Convert between pounds, kilograms, ounces, grams, stones, and metric tons. Includes a weight reference guide for everyday comparisons.
Area Converter
Convert area units instantly — square feet, square meters, acres, hectares, square yards, square miles, and more. Includes real estate, flooring, and agricultural land conversion tabs.
Volume Converter
Convert between liters, gallons, quarts, pints, cups, fluid ounces, milliliters, and cubic meters. US and metric volume conversions.
Unit Converter
All-in-one unit converter covering length, area, volume, weight, speed, pressure, energy, and more. Convert between any two units instantly.
🌡️ Temperature & Cooking 2
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin, and Rankine instantly. Includes a cooking temperature guide and real-world reference chart for body temp, weather, and science.
Cooking Measurement Converter
Convert cups, tablespoons, teaspoons, milliliters, fluid ounces, and grams. Includes ingredient-specific weight conversions for flour, sugar, butter, honey, and 15+ more ingredients.
👗 Fashion & Sizing 2
Clothing Size Converter
Convert clothing sizes between US, UK, EU, Italy, France, and Australia for men, women, and kids. Includes tops, bottoms, dresses, and a measurement guide to find your size.
Shoe Size Converter
Convert shoe sizes between US, UK, EU, CM, and Japan for men, women, and kids. Full size chart included. Enter your foot length to find your exact size in any system.
Date & Time
15 calculators📅 Date Calculations 4
Date Difference Calculator
Calculate the exact number of days, weeks, months, or years between any two dates. Perfect for project planning and deadlines.
Days Until Calculator
Find out how many days until any event, holiday, birthday, or deadline. Includes a countdown to major holidays.
Business Days Calculator
Calculate the number of business days between two dates, excluding weekends and US federal holidays. Essential for project planning and deadlines.
Day of Week Calculator
Find out what day of the week any date falls on — past, present, or future. Great for planning, historical research, and scheduling.
🕐 Time Tools 3
Time Calculator
Add or subtract hours, minutes, and seconds. Calculate time duration between two times, convert time units, and figure out what time it will be in X hours.
World Clock & Time Converter
Convert times between any two time zones instantly. See UTC offsets, DST status, and whether it's business hours at your destination. Includes meeting planner for multiple cities.
World Clock & Time Zone Converter
Live times for 60+ cities worldwide with DST badges, business hours indicators, and night/day mode. Convert any time between zones instantly and find the best meeting time across multiple locations with the built-in meeting planner.
🎂 Life Events 2
Age Calculator
Calculate your exact age in years, months, weeks, days, hours, and minutes. Find out how many days until your next birthday.
Countdown Calculator
Create a live countdown timer to any date and time. Share countdowns for events, launches, and important milestones.
Life Calendar
Your entire life as a grid of weeks — past ones filled, future ones waiting. See exactly how much life you've lived and how much remains.
Your Life in Numbers
Enter your birthdate and watch your entire life unfold in real time — every heartbeat, breath, step, dream, and moment. Your personal stats, ticking live.
World Population Clock
Watch humanity grow in real time. Live birth and death counters, regional breakdowns by continent, milestone tracker, and fascinating population stats updated every second.
🌙 Astronomy 3
Sunrise & Sunset Calculator
Exact sunrise, sunset, solar noon, golden hour, and blue hour times for any location. Uses NOAA astronomical algorithms — no API, works offline. Includes full-year sun calendar and golden hour photography planner.
Moon Phase Calculator
Current moon phase with SVG diagram, moonrise and moonset times, illumination percentage, full moon calendar with supermoon and blue moon detection, and astrophotography planner. No API — pure astronomical algorithms.
Planet Visibility Calculator
See which planets are visible tonight from your location with rise & set times, brightness, and custom SVG planet diagrams. Includes monthly calendar and conjunction finder. No API — pure astronomical math.