Ohm's Law Calculator

Solve voltage, current, resistance, or power using classic Ohm's law relationships.

120 V / 15 ohm =

8 A

Representative value from the Ohm's Law Calculator reference table.

Predefined Value Pages

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Ohm's Law Calculator

Pick what to solve for, then provide the required known values.

Calculated Result

Reference Table

Use this complete table for quick lookup and internal linking to specific value pages.

Ohm's Law Calculator Reference
ScenarioCurrentPower (W)
120 V / 2 ohm60 A7,200
120 V / 4 ohm30 A3,600
120 V / 6 ohm20 A2,400
120 V / 8 ohm15 A1,800
120 V / 10 ohm12 A1,440
120 V / 12 ohm10 A1,200
120 V / 15 ohm8 A960
120 V / 20 ohm6 A720
120 V / 30 ohm4 A480
120 V / 40 ohm3 A360
120 V / 60 ohm2 A240
120 V / 80 ohm1.5 A180