Unit Converter

Convert length, weight, temperature, and data sizes. Metric and imperial, all in one place.

100% private. Your files never leave your device.

Value

Millimetres (mm)
1,000
Centimetres (cm)
100
Metres (m)
1
Kilometres (km)
0.001
Inches (in)
39.3701
Feet (ft)
3.2808
Yards (yd)
1.0936
Miles (mi)
0.000621

About this tool

Switch between everyday units without hunting for a formula. Pick a category, type a number, and every other unit in that group updates at once. Length covers millimetres through miles, weight covers milligrams through pounds, temperature covers Celsius, Fahrenheit, and Kelvin, and data size covers bytes through terabytes. It is built for homework, cooking, travel, and file-size questions alike. The math runs in your browser, so nothing you type is stored or sent anywhere.

How to use

1Choose a category: Length, Weight, Temperature, or Data size.
2Type a value in any unit field. The rest update immediately.
3Copy any converted value you need.
4Switch categories at any time. Each one keeps its last numbers.

Frequently asked questions

Which units are included?

Length (mm, cm, m, km, in, ft, yd, mi), weight (mg, g, kg, oz, lb), temperature (C, F, K), and data size (B, KB, MB, GB, TB using 1024-based binary units).

Are data sizes binary or decimal?

Binary (1 KB = 1024 bytes), which matches how operating systems usually report file sizes.

How accurate is the conversion?

Conversions use standard SI and imperial factors. Results show up to 6 meaningful decimal places and drop trailing zeros so they stay easy to read.

Is anything I type stored?

No. The numbers live only in your browser until you close or reload the page.

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