Clear answers for everyday decisions.
Free calculators that explain the numbers, not just produce them. Fast, private, and built for real-world choices.
Financial calculators
17 free tools with transparent formulas and assumptions.
Mortgage Calculator
Estimate monthly payments, taxes, insurance, PMI, and payoff.
Open calculator →FinancialRefinance Calculator
Compare a new rate, closing costs, break-even time, and savings.
Open calculator →FinancialHome Affordability Calculator
Estimate a home price from income, debts, and down payment.
Open calculator →FinancialRent vs. Buy Calculator
Compare renting versus owning a home and estimate the break-even year.
Open calculator →FinancialExtra Payment Calculator
See how extra principal saves interest and shortens a loan.
Open calculator →FinancialClosing Costs Calculator
Estimate buyer closing costs, prepaid expenses, and total cash needed to close.
Open calculator →All financial calculators
Math calculators
5 free tools with transparent formulas and assumptions.
Percentage Calculator
Find what percentage one number is of another and compare the difference.
Open calculator →MathAverage Calculator
Calculate mean, median, sum, count, minimum, and maximum for a list of numbers.
Open calculator →MathFraction Calculator
Add, subtract, multiply, or divide two fractions and reduce the answer to lowest terms.
Open calculator →MathStandard Deviation Calculator
Calculate population or sample standard deviation, variance, mean, and count for a set of numbers.
Open calculator →MathPercentage Increase Calculator
Calculate the percentage increase or decrease between an original value and a new value.
Open calculator →Everyday calculators
11 free tools with transparent formulas and assumptions.
Age Calculator
Calculate exact age in years, months, days, and total elapsed days for any date.
Open calculator →EverydayDate Difference Calculator
Find the number of days, weeks, hours, and approximate weekdays between two dates.
Open calculator →EverydayTip Calculator
Calculate a tip, total bill, and amount per person when splitting a check.
Open calculator →EverydaySales Tax Calculator
Calculate sales tax and the total purchase price from a pre-tax amount and tax rate.
Open calculator →EverydayDiscount Calculator
Calculate a discount with tax, including sale price, savings, sales tax, and final price.
Open calculator →EverydayTime Calculator
Add or subtract two durations in hours, minutes, and seconds with normalized results.
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