Category

Unit

Symbol

available

Geometry

Length

L

mm, in, m

Area

A

mm², m², in²

Volume

V

mm³, m³, in³

Angle

δ

°, - (radiant)

Energy

Specific energy, Enthalpy

Y, h

m²/s², J/kg, kJ/kg, Nm/kg, Ws/kg, ft²/s², BTU/lb

Head

H

m, ft

Pressure

p

MPa, PSI, bar, mbar, Pa, kPa, mm H20, mm Hg, in H20, ft H20

Stress

τ

MPa, Pa, PSI

Temperature

T

°C, K, °F, °R

Power

P

W, kW, hp

Torque

T

Nm, lbft, lbin

Force

F

N, kN, lbf

Flow

Volume flow

Q

m³/h, m³/min, m³/s, l/min, l/s, ft³/min, ft³/s, gpm, gps

Mass flow

ṁ

kg/s, lb/s

Velocity

v

m/s, ft/s

Swirl

v·r

m²/s, ft²/s, in²/s

Fluid

Density

ρ

kg/m³, lb/ft³

Dynamic viscosity

μ

Pa·s, cP

Kinematic viscosity

ν

m²/s, mm²/s, ft²/s

Heat capacity

cp

J/(kg·K), BTU/(lb·°F)

Molar weight

M

kg/mol

Thermal conductivity

λ

W/(m·K)

Other

Ratio

x/y

%, - (absolute)

Revolutions

n

/min, /s

Mass

m

kg, lb

Time

t

s, m, h