Free Electrical Calculators & Converters
Instantly convert volts, amps, and watts for DC and AC circuits. No signup, no ads, no nonsense.
Tool Categories
Voltage Converters
Convert between volts, amps, and watts in both directions.
3 ToolsPower Converters
Convert watts to volts and volts to watts for any circuit type.
2 ToolsCurrent Converters
Convert amps to watts and watts to amps at any voltage.
2 ToolsPopular Tools
Volts to Watts Converter
Convert voltage and current to power instantly.
W = V × AAmps to Watts Calculator
Find power consumption from current and voltage.
W = A × VWatts to Volts Converter
Find voltage from power and current.
V = W ÷ AAmps to Volts Converter
Convert current to voltage using resistance.
V = A × RAll Tools
Why Use These Calculators?
Instant Results
No page reload. Results calculate as you type. Built for speed on any device.
Formula Shown
Every result displays the full formula used — no black box, full transparency.
DC & AC Covered
All tools support DC and AC circuits including single phase and three phase.
Always Free
No account, no email, no paywall. Every tool is permanently free to use.