Free Calculator Tools

Money, health, dates, and percentages — worked out instantly.

12 free tools · no sign-up · runs in your browser

Our free online calculators cover the everyday math that comes up around money, health, dates, and percentages. Estimate the monthly payment on a loan or mortgage, project how an investment grows with compound interest, work out a discount or a tip, find your BMI, or calculate your exact age — each calculator gives an instant, precise result you can rely on.

Compound Interest Calculator

Calculator

018

Profit Margin Calculator

Date Difference Calculator

Calculator

022

Percentage Change Calculator

Calculator

Every calculator tool, explained

AgAge CalculatorFind an exact age in years, months, weeks, and days.BmBMI CalculatorCalculate body mass index in metric or imperial units.DiDiscount CalculatorSee the sale price and how much you save at any percentage off.LnLoan CalculatorEstimate monthly payments and total interest on any loan.EmEMI CalculatorCalculate equated monthly installments with a full amortization view.MoMortgage CalculatorBreak a home loan into principal, interest, and monthly cost.CiCompound Interest CalculatorProject savings growth with compounding and regular contributions.PmProfit Margin CalculatorCalculate margin, markup, and profit from cost and revenue.TiTip CalculatorSplit the bill and tip fairly across any group size.TxSales Tax CalculatorAdd or remove sales tax and VAT from any amount.DdDate Difference CalculatorCount the days, weeks, and months between two dates.ΔpPercentage Change CalculatorMeasure the percentage increase or decrease between two values.

About these calculator tools

These tools are built for speed and clarity: enter your numbers and the answer updates live, with the key figures broken out so you understand the result, not just see it. Everything is calculated in your browser, so nothing you type is uploaded. Popular picks include the loan, EMI, mortgage, and compound interest calculators for finance, and the age, BMI, and percentage calculators for everyday questions.

Calculator Tools — frequently asked questions

Are these calculators accurate?

Yes. Each calculator uses standard, well-tested formulas (such as the amortization formula for loans) and recalculates instantly as you change inputs.

Do the financial calculators give advice?

No. They provide estimates for informational purposes only and are not financial advice. Always confirm important figures with a professional.

Is there a limit on how many times I can use them?

No limits at all. Every calculator is free to use as many times as you like, with no sign-up.

Do my numbers get saved or shared?

Never. All calculations happen locally in your browser, so the values you enter stay private.

Other collections

Student Tools Converter Tools Image Tools PDF Tools Text Tools Developer Tools SEO Tools Social Media Tools Utility Tools