Fundamental SI Units
There are seven, dimensionally independent, base SI-units and two supplementary units.
All other units can be derived from the base ones. Below, you can find the list of the
base SI units as well as the list of the derived units.
| Unit | Symbol | Quantity |
|---|---|---|
| Meter (metre) | m | Length |
| Kilogram | kg | Mass |
| Second | s | Time |
| Ampere | A | Electric current |
| Kelvin | K | Thermodynamic temperature |
| Mole | mol | Amount of substance |
| Candela | cd | Luminous intensity |
| SI Supplementary Units | ||
| Radian | rad | Plane angle (2D angle) |
| Steradian | sr | Solid angle (3D angle) |
SI Derived Units
| Unit | Symbol | In SI Units | Quantity |
|---|---|---|---|
| Mechanics | |||
| Pascal | Pa | kg·m-1·s-2 | Pressure,Stress |
| Joule | J | kg·m2·s-2 | Energy,Work,Heat |
| Watt | W | kg·m2·s-3 | Power |
| Newton | N | kg·m·s-2 | Force,Weight |
| Electromagnetism | |||
| Tesla | T | kg·s-2·A-1 | Magnetic Field |
| Henry | H | kg·m2·s-2·A-2 | Inductance |
| Coulomb | C | A·s | Electric Charge |
| Volt | V | kg·m2·s-3·A-1 | Voltage |
| Farad | F | kg-1·m-2·s4·A2 | Electric Capacitance |
| Siemens | S | kg-1·m-2·s3·A2 | Electrical Conductance |
| Weber | Wb | kg·m2·s-2·A-1 | Magnetic Flux |
| Ohm | Ω | kg·m2·s-3·A-2 | Electric Resistance |
| Optics | |||
| Lux | lx | cd·sr·m-2 | Illuminance |
| Lumen | lm | cd·sr | Luminous Flux |
| Radioactivity | |||
| Becquerel | Bq | s-1 | Radioactivity |
| Gray | Gy | m2·s-1 | Absorbed Dose |
| Sievert | Sv | m2·s-1 | Equivalent Dose |
| Other | |||
| Hertz | Hz | s-1 | Frequency |
| Katal | kat | mol·s-1 | Catalytic Activity |
