International System of Units (SI) ke sistimi e sebelisoang haholo ea liyuniti ho metha bongata ba 'mele. SI e sebelisoa linaheng tse ngata tsa lefats'e mme hoo e batlang e le kamehla saenseng.
Tafole e ka tlase e fana ka tlhahisoleseding ka li-unit tse 7 tsa motheo tsa SI: lebitso le lebitso ( le Senyesemane / Machaba), hammoho le boleng bo lekantsoeng.
| Lebitso la unit | ho khethoa ha | Boleng bo lekantsoeng | ||
| Senyesemane. | Senyesemane. | |||
| ea bobeli | ea bobeli | с | s | Time |
| Meter | mitha | м | m | Bolelele (kapa sebaka) |
| Kililone | Kililone | kg | kg | Weight |
| Ampere | Ampere | А | A | Matla a hona joale a motlakase |
| Kelvin | Kelvin | К | K | Thermodynamic mocheso |
| Mole | mole mole | mole mole | Mol | Palo ea thepa |
| Candela | Candle | cd | cd | Matla a kganya |
Hlokomela: Esita le haeba naha e sebelisa tsamaiso e fapaneng, li-coefficients tse itseng li behiloe bakeng sa likarolo tsa eona, ho li lumella hore li fetoleloe ho li-unit tsa SI.