Unit converter
Convert units of length, mass, temperature, volume, area, speed, data and more free in your browser. Live and 100% private. No upload, no sign-up.
100% private — files never leave your deviceHow to use
- Pick a measure. Choose what you're converting — length, weight, temperature, data and more.
- Choose units. Select the from and to units from the list for that measure.
- Enter a value. Type a number and the converted result appears live.
- Swap if needed. Use the swap button to reverse the conversion instantly.
Features
- Many measures. Length, mass, temperature, volume, area, speed, time, digital storage, energy, pressure and more.
- Live conversion. Results update as you type — no button to press.
- Metric and imperial. Convert freely between metric and imperial (US) units.
- One-tap swap. Flip the from and to units to reverse the calculation.
- Nothing leaves your device. All conversion happens locally in your browser.
When to use it
- Convert kilometres to miles or metres to feet.
- Switch a recipe between grams, ounces and cups.
- Convert Celsius to Fahrenheit and back.
- Work out data sizes between MB, GB and GiB.
- Convert speeds like km/h to mph for travel.
Is it private?
All conversions happen locally in your browser and nothing is uploaded.
Frequently asked questions
Is this unit converter free?
Yes, it's completely free with no sign-up and no limits.
Which measures are supported?
Many, including length, mass, temperature, volume, area, speed, time, digital storage, energy, power and pressure.
Does it convert live?
Yes. The result updates as you change the value or the selected units.
Is my data uploaded?
No. Conversions happen locally in your browser and nothing is sent to a server.
Can I convert metric to imperial?
Yes. Each measure includes both metric and imperial units so you can convert either way.
Do I need to install anything?
No. It runs entirely in your web browser with nothing to install.
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