doomath Calculator
Ohm Law Calculator
Solve voltage, current or resistance.
InputsChange a value to recalculate instantly
ResultUpdates as you type
PHYSICAL SIMULATOR
Electrical Closed-Loop Circuit & Ohm's Simulator
LIVE ENGINE 60FPS
FORMULA & STEPSOhm Law Calculator — Mathematical Derivation & Steps
3 StepsSequential Calculation Breakdown
1
Given Electrical Values
Applied electrical potential difference and circuit impedance.
2
Solve for Current (Amperes)
Electrical charge flow rate in amperes.
3
Calculate Power Dissipation (Watts)
Rate at which energy is converted to heat or work.
λ DooMathWork with this calculation
Local · deterministic · optionalQuick mathNatural-language-style shortcuts for deterministic arithmetic.
Calculator guide
How to use the Ohm Law Calculator
Solve voltage, current or resistance.
01Set inputsChoose values, units and assumptions.
02Apply the modelUse the stated mathematical relationship.
03Read the resultCheck the output against the assumptions before using it.
What this calculator does
Solve voltage, current or resistance.
Formula & method
The result is calculated from the inputs and assumptions shown in the calculator.
Assumptions & notes
Review the inputs, units and assumptions before using the result for a real decision.