Unit Converter
Convert length, weight, volume, area, speed, time, data, and temperature
How to use
- Choose a category (Length, Weight, etc.)
- Enter a value and pick its unit
- Every other unit updates instantly
- Click a cell to copy
Use cases
- International work
- Cooking conversions
- Engineering
- Travel
About the Unit Converter
Unit conversion is the most reached-for utility in any tool belt — length for travel, weight for cooking, data for storage, temperature for travel and cooking both. This converter covers all 8 major physical categories with NIST-grade precision, updates live, and runs entirely in your browser.
Features
- 8 categories: Length, Weight, Volume, Area, Speed, Time, Data storage, Temperature
- 50+ units covering metric, imperial, and industry-specific scales
- All conversions update live as you type
- One-click copy for every output
- Both decimal (KB = 1000 B) and binary (KiB = 1024 B) data units
How it works
- Pick a category (Length, Weight, Temperature, etc.).
- Enter a value and choose its unit.
- Every other unit in the category updates instantly.
- Click any cell to copy that converted value.
Frequently asked questions
How precise are the conversions?
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We use exact ratios from NIST/SI definitions and render up to 12 significant figures. Results with tiny decimals switch to scientific notation automatically.
Is 1 MB = 1000 KB or 1024 KB?
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Both — we show them separately. MB/GB/TB are decimal (1000-based, used by disk manufacturers and network speeds). MiB/GiB/TiB are binary (1024-based, used by operating systems).
Are US and UK gallons the same?
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No. 1 US gallon ≈ 3.785 L; 1 UK gallon ≈ 4.546 L. We include both.
Does temperature use exact conversions?
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Yes. Celsius, Fahrenheit, and Kelvin use their exact formulas — Fahrenheit = Celsius × 9/5 + 32, Kelvin = Celsius + 273.15.
Can I add custom units?
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Not yet — the 50+ built-in units cover ~99% of real-world needs. If you need an unusual unit, reach out.