-- Core --

✔

Use the multipliers M (mega), k (kilo), c (centi) and m (milli).

length: symbol l, h, d, s, x; unit km, m, cm, mm

area: symbol A; unit m², cm²

volume: symbol V; unit m³, cm³, dm³

weight: symbol W; unit N

mass: symbol m, M; unit kg, g

time: symbol t; unit h, min, s

density: symbol ρ; unit g / cm³, kg / m³

speed: symbol u, v; unit km / h, m / s, cm / s

acceleration: symbol a; unit m / s²

acceleration of free fall: symbol g; unit m / s²

force: symbol F; unit N

gravitational field strength: symbol g; unit N / kg

moment of a force: unit N m

work done: symbol W; unit J, kJ, MJ

energy: symbol E; unit J, kJ, MJ, kW h

power: symbol P; unit W, kW, MW

pressure: symbol p; unit N / m², N / cm²

temperature: symbol θ, T; unit °C, K

frequency: symbol f; unit Hz, kHz

wavelength: symbol λ; unit m, cm

focal length: symbol f; unit m, cm

angle of incidence: symbol i; unit degree (°)

angle of reflection: symbol r; unit degree (°)

angle of refraction: symbol r; unit degree (°)

critical angle: symbol c; unit degree (°)

potential difference / voltage: symbol V; unit V, mV, kV

current: symbol I; unit A, mA

e.m.f.: symbol E; unit V

resistance: symbol R; unit Ω

count rate: unit counts / s, counts / min

half-life: unit s, min, h, days, weeks, years

-- Extended --

✔

Use the multipliers G (giga), µ (micro) and n (nano).

mass: symbol m, M; unit mg

time: symbol t; unit ms, µs

spring constant: symbol k; unit N / m, N / cm

momentum: symbol p; unit kg m / s

impulse: unit N s

pressure: symbol p; unit Pa

specific heat capacity: symbol c; unit J / (g °C), J / (kg °C)

wavelength: symbol λ; unit nm

refractive index: symbol n

charge: symbol Q; unit C

Hubble constant: symbol H₀; unit s⁻¹