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Calculate your Body Mass Index. Metric and imperial supported. Includes gauge and WHO categories.

Calculate percentages, increases, decreases and ratios instantly. Three calculation modes.

Find out exactly how old you are in years, months and days. Includes total days lived and next birthday countdown.

Calculate your monthly mortgage payment, total interest, and full amortization schedule.

Calculate investment growth with compound interest, monthly contributions and inflation adjustment.

Calculate sale prices, find the original price before a discount, or determine what % off you received.

Find your Total Daily Energy Expenditure using the Mifflin-St Jeor formula. Get calorie targets for weight loss, maintenance or muscle gain.

Find the exact number of days, weeks, months and years between any two dates.

Live timer showing days, hours, minutes and seconds until any target date.

Calculate the tip and split the bill fairly among any number of people.

Generate strong random passwords with custom length, uppercase, numbers and symbols. Includes strength meter.

Create QR codes for URLs, WiFi, email and text. Customize colors and download as PNG or SVG.

Generate random UUID v4 identifiers. Generate one or many at once and copy to clipboard.

Generate placeholder text for design and layout. Choose paragraphs, sentences or words.

Pick a random number or run a full raffle draw with no duplicates. Set any min/max range.

Convert between 27 currencies with real-time ECB exchange rates. Cached in your browser for speed.

Convert between Celsius, Fahrenheit and Kelvin in real time. Edit any field to update the others.

Convert JPG, PNG, WebP, BMP, GIF and SVG. Batch convert, resize and control quality. Free, no upload.

Length, weight, speed, volume, area and data storage — metric, imperial and binary — all in one place.

Format, validate and convert JSON, XML, YAML, CSV and HTML. Auto-detects format.

Test and debug regular expressions with live match highlighting, capture groups, and replace preview.

Encode and decode URLs (percent-encoding). Useful for APIs and web development.

Convert Unix timestamps to dates and back. Live ticker, timezone support, seconds and milliseconds.

Live world clock for multiple cities. Convert time between any timezones instantly.

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from text or files. Runs entirely in your browser.

Count words, characters, sentences and paragraphs. Estimates reading time and top keywords.

Compare two texts and highlight differences line by line.

Calculate your 5 training heart rate zones by age. Supports Karvonen formula with resting HR.

Calculate running pace, finish time or distance. Supports km and miles with marathon presets.

Convert GPS coordinates between DD, DMS, DDM, UTM and Geohash. Auto-detects input format. WGS84.

Convert colors between HEX, RGB and HSL instantly. Live preview and copy to clipboard.

Generate harmonious palettes with 6 harmony modes and fine-tune sliders. Export to HEX, CSS vars, Tailwind or PNG.