Calculators

Calculate percentages instantly: find X% of a number, what percent one value is of another, or the percentage change between two numbers.

Calculate your Body Mass Index instantly from metric or imperial inputs — WHO categories, visual range bar, fully private, runs in-browser.

Calculate your exact age in years, months, days, weeks, and hours from any birth date — free, instant, private, browser-only.

Calculate monthly EMI, total interest and full amortization schedule for any loan — instantly, 100% in your browser.

Calculate the tip amount, total bill, and per-person split instantly. Choose 10%, 15%, 18%, 20% or a custom percentage. Runs entirely in your browser.

Calculate sale prices, savings, and percentage off instantly. Works for any currency — no sign-up, runs in your browser.

Calculate how your savings or investment grows with compound interest. Supports monthly contributions and any compounding frequency. Runs entirely in your browser.

Find the exact number of days, weeks, years, months, and days between any two dates. Runs entirely in your browser.

Instantly simplify any width/height pair to its exact aspect ratio, or scale a known ratio to any new dimension. Runs entirely in your browser.