Distance: Kilometres ( km ), Metres ( m ), Millimetres ( mm )

Area: Square Metres ( m² )

Volume: Room Volume, Cubic Metres ( m³ ), Litre ( l )

Velocity: Kilometres per hour ( km/h ), Metres per second ( m/s )

Mass: Tonne, Kilogramme ( kg )

Density: Kilogramme per Litre ( kg/l ), Tonnes per Cubic Metre ( Tonnes/m³ )

Force: Kilonewtons ( kN ), Newtons ( N )

Acceleration: Metres per second per second ( m/s/s or m/s² or ms^-2 )

Sound Pressure Level (SPL): Decibel (dB) ['A' close to human ear response]

Light: Lumen, Lux ( 1 Lux = 1 Lumen / m² )

Temperature: Kelvin ( °K ), Celsius( °C ) - [ 0 °K = -273 °C ]

Electrical: Potential - Volt ( V ), Current - Amp ( I ) [AC or DC], Resistance - Ohm( Ω )

Electrical Power: Watt ( W ), kiloWatt (kW). Power used: kilowatt hours ( kWh )