Unit Converter
Convert length, weight, data, speed, area, volume, time, and temperature — instantly, accurately, and right on your device.
Built for real conversions
Exact standards
Definitions come from international standards — an inch is exactly 25.4 mm, a pound is exactly 453.59237 grams.
Instant results
Every keystroke converts immediately. Swap units with one click and the calculation follows.
Works offline
All math runs on your device. After the page loads, you can go offline and keep converting.
Frequently asked questions
How do I convert units?
Pick a category — length, weight, temperature, and more — then type a value on the left. The converted result updates instantly on the right as you type.
Which unit categories are supported?
Length, weight, data size, speed, area, volume, time, and temperature — covering the conversions people actually need day to day.
How accurate are the conversions?
Conversions use exact standard definitions (for example, 1 inch = 25.4 mm exactly) and results are shown to 10 significant digits, then rounded for display.
Does this work offline?
Yes. Once the page has loaded, every conversion is computed on your device — no connection required.
Need file conversion too?
Images, PDFs, video, and audio — converted on your device, never uploaded.
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