Convert between length, weight, temperature, area, volume, speed, data storage (bytes to petabytes), and elapsed time units — fast, accurate, no sign-up.
Frequently Asked Questions
- What units does the Data category cover?
- Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes, and Petabytes, using binary (1024-based) conversion factors.
- Does it support imperial and metric?
- Yes. Length covers mm, cm, m, km, in, ft, yd, mi. Weight covers g, kg, oz, lb. Temperature: C, F, K.
- Is my data stored or sent anywhere?
- No. All conversion math runs locally in your browser — nothing is uploaded.
- Can I add custom units?
- Not yet. Standard SI and imperial units are supported.
- Does it work offline?
- Yes. After first load, every category works fully offline — there's no external API call for any conversion.
- Does it support cooking units?
- The Volume category supports liters, milliliters, US gallons, quarts, pints, cups and fluid ounces. Tablespoons and teaspoons are not currently included.
How to convert units online
- Pick a category. Choose Length, Weight, Temperature, Area, Volume, Speed, Data, or Time.
- Enter a value. Type any number. Negative and decimal values are supported.
- Pick source and target units. Select what you have (meters, pounds, Fahrenheit, etc.) and what you want.
- Read the result. See the conversion live along with the exact formula used. Switch source ↔ target with one click.
FreeNo sign-upRuns in your browser
Use Cases
- Convert kitchen recipes between metric and imperial
- Convert pounds to kilograms for travel weight limits
- Convert Fahrenheit to Celsius for travel or weather
- Convert file sizes between MB, GB, and TB when checking storage limits
- Convert engineering units in a pinch