Niche & Everyday CalculatorsFree100% Client-Side
Unit Converter
Convert between units of length, weight, temperature, volume, area, speed, and time instantly as you type.
100% privateRuns instantly in-browserUpdated regularly
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100% Secure & Private
Your files never leave your computer — processed in-browser with WebAssembly.
Lightning Fast
No queues, no uploads — results in milliseconds, even on mobile.
Modern & Ad-Light
Clean interface, dark mode, and no popups — built to beat legacy tools.
What you get
- 7 categories: length, weight, temperature, volume, area, speed, time
- Live conversion as you type
- Accurate temperature formulas (C/F/K)
- One-click unit swap
- Wide range of everyday and scientific units
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Frequently asked questions
No, temperature uses proper formulas: Celsius, Fahrenheit, and Kelvin each require specific offset and scale calculations rather than a single multiplier.
Length, weight/mass, temperature, volume, area, speed, and time, each with a range of common metric and imperial units.
Yes, click the swap icon between the two unit selectors to instantly reverse the conversion direction.