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Unit Converter
Length, weight, temperature, volume, area, speed, time and data sizes. Conversions use exact definitions, not rounded factors.
Numbers can use a decimal point, a comma as a thousands separator (1,000), or scientific notation (2.5e-4).
Enter a value.
Precision-
All units in this category
| Unit | Value |
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Definitions
Each conversion uses the exact definition below. Where a unit is defined by a rule rather than a fixed factor, that rule is given.
| Unit | Definition |
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Results are exact when the answer has a finite number of digits. Otherwise they are rounded to 15 significant digits, and the page says so. Everything runs in your browser; no numbers are sent or stored.
How it works
Each value is held as an exact fraction (two whole numbers), and each unit's factor is an exact definition, so no rounding happens until the result is shown. Temperatures use the exact offset and scale rules, so 100 °C is exactly 212 °F.