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Convert between units of length, weight, temperature, volume, and more.

by Launch Arcade

A real-time strategy game in 13KB of JavaScript and WebGL. Command units, capture resources, and conquer the map.

by phoboslab

Convert between Celsius, Fahrenheit, and Kelvin instantly. Enter any temperature and see all three units update in real time.

by TheNewC0der-24

A reactive notepad calculator. Type math expressions and see results instantly — supports variables, functions, and unit conversions.

by grimalschi

On-screen measurement tool with rulers in centimeters, millimeters, inches, and feet. Calibrate to your display.

by samyakrajbayar

Calculate your Total Daily Energy Expenditure. Get your BMR, maintenance calories, and targets for fat loss, maintenance, and bulking.

by Launch Arcade

Calculate pace, finish time, or distance for running and cycling. Includes mile/km splits table, preset race distances, and imperial/metric support.

by Launch Arcade

Full scientific calculator with trig, log, and advanced operations.

by Launch Arcade

Calculate voltage, current, resistance, and power using Ohm's law.

by Launch Arcade

An interactive duration picker for hours, minutes, and seconds. Scroll or type to set precise time durations — clean, lightweight, no dependencies.

by nadchif

Compress JSON into ultra-short URL-friendly strings. Paste JSON, get a crushed version you can share in URLs or query params.

by KilledByAPixel

Create professional invoices with line items, tax calculation, and notes. Print or save as PDF directly from the browser.

by vinay20045