Watts to Volts Conversion Calculator

Convert power to voltage using current or resistance.

⏱ Updated: 17 Sep 2026

Calculator

Free watts to volts calculator: convert power to voltage using current or resistance.

Voltage
V

Enter a power value, plus current or resistance, to calculate voltage.

How to Use the Watts to Volts Conversion Calculator

Power plus current or resistance — the last of this family's paired-input conversions, all built on the same underlying Ohm's Law relationships.

Using current:    V = P ÷ I
Using resistance: V = √(P × R)

Same pattern as the other watts-conversions in this category: a direct rearrangement if you know current, a square root if you're starting from resistance instead — because power scales with voltage squared (P = V²÷R), not voltage directly. This Watts to Volts Calculator covers both.