Free Online Calculators & Tools

Calculate body mass index from height and weight, then view the adult BMI category and a height-based healthy-weight range.

Solve common percentage problems, including finding a percentage of a value, the percentage one value is of another, and the change between values.

Calculate mortgage principal and interest payments, total interest, and an amortization schedule from loan amount, rate, and term.

Free online age calculator — no registration required. Find your exact age in years, months, and days.

Count words, characters, sentences, paragraphs, reading time, and platform-length limits in pasted text.

Format, validate, or minify JSON text locally in your browser with parse errors shown for invalid syntax.

Calculate your Total Daily Energy Expenditure (TDEE) and find out exactly how many calories you need to eat to lose, maintain, or gain weight.

Project a balance from an initial deposit, monthly contributions, annual return, term, and compounding frequency.

Generate a random 6-64 character password locally with selectable character groups and optional ambiguous-character removal.

Convert between global currencies using live exchange rates. Calculate exact conversion amounts for international transactions or travel.

Calculate a tip, total bill, and equal share per person from a bill amount, tip percentage, and group size.

Generate a QR code from text or a URL in the browser and download the resulting image.