Every calculation,
one clean answer.
Loans, savings, tips, BMI, percentages, and more — fast calculators that run entirely in your browser.
Loan Calculator
Live demo
Monthly payment
$489.15
Total interest: $4,349
All tools
Pick a calculator — every one is free, instant, and private.
Loan Calculator
Estimate monthly payments, total interest, and total cost for any loan.
Open calculatorCompound Interest Calculator
See how your savings grow over time with compounding returns.
FinanceROI Calculator
Measure return on investment and annualized returns in seconds.
FinanceSalary to Hourly Calculator
Convert an annual salary into hourly, weekly, and monthly pay.
FinanceTip Calculator
Work out the tip and split the bill fairly between friends.
EverydayPercentage Calculator
Find percentages, percentage change, and what percent X is of Y.
EverydayDiscount Calculator
Calculate sale prices and exactly how much you save.
EverydayDate Difference Calculator
Count the days, weeks, months, and years between two dates.
EverydayGas Price Travel Estimator
Estimate fuel cost for a trip and split it between travelers.
EverydayBMI Calculator
Check your body mass index in metric or imperial units.
HealthAge Calculator
Find your exact age in years, months, days, and more.
HealthUnit Converter
Convert length, weight, and temperature between common units.
UtilityGPA Calculator
Calculate your grade point average on the 4.0 scale.
UtilityInstant answers
Every calculator runs client-side, so results appear the moment you hit calculate.
Private by design
Nothing you type ever leaves your browser. No accounts, no tracking of your numbers.
Formulas explained
Each tool shows the exact formula and a plain-English walkthrough of how it works.