Calculate common circuit values including voltage, current, resistance, power, series resistance, parallel resistance, circuit load, watts, amps, and basic Ohm's Law results.
Ohm's Law circuit:
Use voltage, current, resistance, and power formulas to solve a missing circuit value.
Series resistance:
Add each resistor value together to estimate total circuit resistance.
Parallel resistance:
Add the reciprocal of each resistance value, then take the reciprocal of that total.
A circuit calculator helps estimate common electrical values when designing, checking, or troubleshooting simple circuits.
It can help with Ohm's Law, resistor combinations, circuit current, watts, amps, breaker load estimates, electronics projects, DC circuits, and basic electrical planning.
Your result shows solved circuit value, voltage, current, resistance, power, series resistance, parallel resistance, load percentage, energy estimate, component totals, and a calculation summary.
A circuit calculator estimates common circuit values such as voltage, current, resistance, power, series resistance, and parallel resistance.
Use I = V ÷ R. Divide voltage by resistance to estimate current in amps.
Add each resistor value together. For example, 10 ohms plus 20 ohms plus 30 ohms equals 60 ohms.
Use the reciprocal formula: total resistance equals 1 divided by the sum of each reciprocal resistance.