Calculators

Calculators for loans, savings, health, time, dates, percentages, and everyday measurements. Each one shows the formula it used, so you can check the answer yourself.

65 tools Runs in your browser Free, no sign-up Updated

All Calculators

Loans and mortgages

The Loan Calculator gives the monthly payment and total interest on any fixed-rate loan. The Mortgage Calculator adds property tax, insurance, HOA fees, and PMI, and the Car Loan Calculator handles trade-ins and sales tax. To pay less, try the Mortgage Payoff and Debt Consolidation calculators. Before you buy, check how much house you can afford, compare renting and buying, price an auto lease, or run the numbers on a rental property.

Interest, savings, and investing

Simple interest and compound interest show how a balance grows. The Savings and Retirement calculators add monthly deposits over the years. Compare offers with the APR and APY to APR calculators. Investors can measure growth with CAGR and the Rule of 72, estimate dividend income, find their average share price, and size a position with the Kelly Criterion.

Health and fitness

BMI, BMR, body fat, and ideal weight each measure the body a different way. The Calorie Calculator turns BMR into a daily target, the Pace Calculator plans a run, and the due date calculator tracks a pregnancy week by week. These results are general information, not medical advice.

Business and marketing

Time and date calculators

For hours and minutes, the Time Calculator adds amounts of time and the Time Duration Calculator measures the gap between two clock times. The Work Hours Calculator projects one daily schedule over a year, and the Time Card Calculator handles a full week with overtime and pay.

For dates, use the Date Calculator, Days Between Dates, the Business Days Calculator, and the Age Calculator. Quick answers come from the leap year, day of the week, day of the year, and BC to AD calculators. The Calendar Converter switches between Gregorian, Persian, Islamic, Hebrew, and Chinese dates.

Percentages

The Percentage Calculator answers X% of Y, X as a percent of Y, and the whole from a part. For change between two values, use the percentage increase or percentage decrease calculator, or the percentage change calculator when the direction doesn't matter.

Everyday measurements

The Aspect Ratio, Fuel Economy, Distance, GPA, and Concrete calculators cover screens, travel, school, and building work. Wind chill and heat index give the temperature it feels like outside, and the Dog and Cat Age Calculator turns pet years into human years.

Frequently asked questions

Are these calculators free?

Yes. There is no sign-up and no usage limit.

Is anything I type stored?

No. The calculations run in your browser, and the numbers you enter are not sent to our server.

How accurate are the results?

Each calculator uses the formula shown on its page, and every worked example is covered by automated tests. Date tools follow the Gregorian calendar, including leap years.

Are the loan and savings results exact?

They use the standard formulas and are shown to the cent, but they are estimates before tax and before any fees a lender adds. Check the final figures with your bank before you sign anything.

Can I use the health calculators for medical decisions?

No. BMI, BMR, body fat, and calorie results are general estimates for adults. Talk to a doctor before you change your diet or training.