Physics & Electricity Calculators

Motion and energy problems with units converted for you, plus everyday electricity: Ohm’s law, single and three-phase power, your monthly bill from slab tariffs or appliances, voltage dividers and resistor colour codes.

Speed Distance Time Calculator

Speed, distance or time from the other two.

Acceleration Calculator

Acceleration from velocity change and time.

Force Calculator

F = ma: force, mass or acceleration.

Work Calculator

Work done, W = F × d × cos θ.

Kinetic Energy Calculator

KE = ½mv² in J, kJ or kWh.

Potential Energy Calculator

PE = mgh on Earth, Moon or Mars.

Momentum Calculator

p = mv, momentum and impulse.

Ohm's Law Calculator

V = IR and P = VI from any two values.

Electrical Power Calculator

Power or current: DC, single and three phase.

Electricity Bill Calculator

Bill from units and slabs, or from appliances.

Voltage Divider Calculator

Vout from two resistors, or R2 for a target.

Resistor Color Code Calculator

Resistance from 4, 5 or 6 colour bands.