Metric (non-SI) Units
Metric units that sit outside the SI proper but are accepted for use with it or remain in common use, such as the litre, tonne and hectare. 9 units are listed.
| Unit | Symbol | Quantity | Value in SI |
|---|---|---|---|
| Litre | L | Volume | 1 L = 1 dm³ = 0.001 m³ (exact) |
| Tonne | t | Mass | 1 t = 1000 kg (exact) |
| Hectare | ha | Area | 1 ha = 10,000 m² (exact) |
| Day | d | Time | 1 d = 86,400 s (exact) |
| Degree of arc | ° | Plane angle | 1° = π/180 rad |
| Bar | bar | Pressure | 1 bar = 100,000 Pa (exact) |
| Ångström | Å | Length | 1 Å = 10⁻¹⁰ m = 0.1 nm (exact) |
| Metric carat | ct | Mass | 1 ct = 200 mg (exact) |
| Kilowatt-hour | kWh | Energy | 1 kWh = 3,600,000 J (exact) |