Ohm’s law calculator
Find voltage, current, resistance and power for a simple DC resistive load.
Useful tools, right when you need them. All free. All in your browser.
Find voltage, current, resistance and power for a simple DC resistive load.
Decode four- or five-band resistor values and tolerance.
Estimate a series resistor and dissipation from supply voltage, LED drop and current.
Calculate classical kinetic energy, mass or speed from two known values.
Explore ideal projectile trajectories with a launch speed, angle and height.