All Calculators
27 free calculators for finance, home improvement, and everyday math.
Financial
Calculators for loans, investments, budgeting, and more.
Compound Interest Calculator
See how your savings grow over time with the power of compound interest. Enter your principal, rate, and time horizon.
Mortgage Calculator
Calculate your monthly mortgage payment, total interest paid, and full amortization schedule.
Budget Planner
Plan your monthly budget by allocating income across categories using the 50/30/20 rule.
Loan Payoff Calculator
Find out how long it will take to pay off your loan and how much you'll pay in total interest.
Retirement Calculator
Project your retirement savings, find the gap between what you have and what you need, and get a recommended monthly savings target.
Debt Payoff Calculator
See exactly how long it will take to pay off your debt and how much interest you can save by adding extra monthly payments.
Savings Goal Calculator
Calculate how much you need to save each month to reach your goal, and whether your current contributions will get you there on time.
Car Loan Calculator
Calculate your monthly car payment, total interest, and true cost of your auto loan — including trade-in value, sales tax, and a full amortization schedule.
Loan Comparison Calculator
Compare two loan offers side by side — monthly payment, total interest, and total cost — to instantly see which deal is truly better.
Salary to Hourly Calculator
Convert annual salary to hourly rate — or hourly to annual. See your hourly, daily, weekly, bi-weekly, and monthly pay in one table.
Inflation Calculator
See how inflation erodes purchasing power over time. Enter a starting amount, start year, end year, and inflation rate to find the future equivalent value.
Paycheck Calculator
Calculate your exact take-home pay after federal taxes, state taxes, Social Security, Medicare, 401(k), and health insurance deductions.
Rent vs. Buy Calculator
Compare the true long-term cost of renting vs. buying a home. See the break-even point, year-by-year comparison, and which option is better for your situation.
Investment Return Calculator
Project your portfolio growth with monthly contributions. See total returns, the real cost of management fees, and a year-by-year growth table.
Home & DIY
Calculators for home improvement and renovation projects.
Paint Coverage Calculator
Calculate how many gallons of paint you need for any room. Enter your wall dimensions and number of coats.
Flooring Calculator
Calculate how much flooring material you need, including waste factor, for any room shape.
Mulch & Topsoil Calculator
Calculate how many cubic yards or bags of mulch or topsoil you need for your garden beds.
Square Footage Calculator
Calculate square footage for rectangles, triangles, circles, and L-shaped rooms. Convert to square meters and estimate project costs per square foot.
Everyday Math
Practical calculators for everyday calculations.
Tip Calculator
Quickly calculate tip amounts and split the bill evenly among any number of people.
Unit Converter
Convert between common units of length, weight, temperature, volume, and more.
Percentage Calculator
Calculate percentages three ways: find X% of Y, determine what percentage X is of Y, or calculate the percentage change from X to Y.
Age Calculator
Calculate exact age in years, months, and days from a birthdate, or find the date difference between two dates.
BMI Calculator
Calculate your Body Mass Index, see your BMI category, and find the healthy weight range for your height — in imperial or metric.
Electricity Cost Calculator
Calculate how much any appliance or device costs to run per day, month, and year. Choose from common presets or enter custom wattage.
Date Calculator
Find the number of days between two dates, add or subtract days from any date, and look up the day of the week for any date in history.
GPA Calculator
Calculate your GPA on a 4.0 scale. Add courses with letter grades (A through F) and credit hours to instantly compute your semester or cumulative GPA.
Health
Calculators for nutrition, fitness, and health metrics.