2 free tools
Science calculators
Enter the values you know, choose your units and get the rest, with the formula shown so you can follow the working.
- Science
Ohm's law calculator
Enter any two of voltage, current, resistance and power to find the other two with Ohm's law. Units include mV, kV, mA, µA, kΩ, MΩ, mW and kW.
Open tool - Science
Speed, distance and time calculator
Find speed, distance or time from the other two, with km/h, mph, m/s or knots and km, miles, meters or nautical miles.
Open tool