Units of Measurement
Measurement units and symbols, grouped by what they measure and the system they belong to.
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10 of 61 records · Select a column heading to sort.
| ID | Unit name | Symbol | Quantity | System |
|---|---|---|---|---|
| 1 | Metre | m | Length | SI |
| 2 | Kilogram | kg | Mass | SI |
| 3 | Second | s | Time | SI |
| 4 | Ampere | A | Electric current | SI |
| 5 | Kelvin | K | Temperature | SI |
| 6 | Mole | mol | Amount of substance | SI |
| 7 | Candela | cd | Luminous intensity | SI |
| 8 | Radian | rad | Plane angle | SI derived |
| 9 | Steradian | sr | Solid angle | SI derived |
| 10 | Hertz | Hz | Frequency | SI derived |
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Scope and sources
Last checked against sources: October 15, 2026.
Last changed: July 19, 2026. This is when we last changed the data or its description. It doesn’t mean the data runs up to that date.
- NIST Special Publication 811, Guide for the Use of SI (used with permission)
A complete download includes all 61 records currently held in this dataset. Check the description and sources to decide whether its scope fits your project.
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