Quick, accurate calculators for everyday math, from percentages to dates, with no sign-up required.
This age calculator gives you your exact age broken down into years, months and days, plus total months, weeks and days lived. Enter your birth date and optionally a reference date — if left empty, today's date is used. Everything runs in your browser, so your personal information never leaves your device.
This BMI calculator computes your Body Mass Index from your height and weight using the standard WHO formula. It displays your BMI value along with the corresponding weight category such as underweight, normal, overweight or obese. The calculation is performed entirely in your browser, so your personal health data never leaves your device. Use this tool for a quick health assessment anytime.
Find the exact number of days, weeks, months or years between any two dates with this free date difference calculator. It gives you a detailed breakdown showing years, months and days, plus total days, total weeks and total months. Useful for project planning, age calculations, and deadlines. Enter start and end dates in YYYY-MM-DD format and get results instantly in your browser.
A percentage compares a part to a whole out of 100, and this calculator answers the three questions people ask most often: what a percentage of a number equals, what percentage one number represents of another, and how much a value has increased or decreased. Enter your numbers below and get an instant result along with the exact formula used, so you can check the arithmetic yourself.
A full-featured scientific calculator that handles both basic arithmetic and advanced math functions. Evaluate expressions with sine, cosine, tangent, logarithms, square roots, powers, and mathematical constants. Type expressions directly or use the button grid. Everything runs in your browser with a safe expression parser.