Calculators

Quick, no-nonsense calculators for everyday math — percentages, ages and more. Instant answers, right in your browser.

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Percentage Calculator

Work out percentages, percentage change and "X is what % of Y" in seconds.

Loan Calculator

Monthly payment, total interest and cost for a mortgage, car or personal loan.

BMI Calculator

Get your body mass index and weight category in metric or imperial units.

Tip Calculator

Work out the tip, total and per-person split for any bill.

Age Calculator

Find an exact age in years, months and days from a date of birth.

Date Difference

Time between two dates in years, months, days — plus total days and weeks.

Discount Calculator

Sale price, savings and final cost — with stacked discounts and tax.

Mortgage Calculator

Full monthly payment (PITI) — principal, interest, tax, insurance and PMI.

Compound Interest

Project savings growth with contributions, rate and compounding.

Car Loan Calculator

Monthly auto payment with down payment, trade-in, tax and APR.

Car Lease Calculator

Lease payment from MSRP, residual and money factor — with the math shown.

Lease Mileage Calculator

Your km allowance per month and day, plus the cost if you go over.

TDEE Calculator

Daily calorie needs and BMR with fat-loss and muscle-gain targets.

Salary Converter

Annual salary into monthly, bi-weekly, weekly, daily and hourly pay.

Profit Margin Calculator

Gross profit, margin and markup from cost and price — or price a target margin.

Freelance Rate Calculator

The hourly and day rate to charge from target salary, expenses and billable hours.

Macro Calculator

Split daily calories into grams of protein, carbs and fat — balanced, keto and more.

GPA Calculator

Weighted semester or cumulative GPA on a 4.0 scale from grades and credits.

Time Card Calculator

Total weekly hours worked from daily times, with overtime and estimated pay.

Sales Tax Calculator

Add tax to a price or pull it out of a total — sales tax, VAT or GST.

Unit Price Calculator

Compare two products by cost per unit to find the cheaper buy.

Target Heart Rate

Five training zones in BPM from your age and resting heart rate (Karvonen).

Free online calculators

Everyday math shouldn't need a spreadsheet. This category collects small, focused calculators that give you an instant answer and show the working, so you can trust the result. Each one runs entirely in your browser — fast, private and free.

Available now: a percentage calculator, a loan calculator, a BMI calculator, a tip calculator, an age calculator, a date difference calculator, a discount calculator, a mortgage calculator, and a full set of car tools — a car loan calculator, car lease calculator and lease mileage calculator — with more everyday tools on the way.