Watts Amps Volts Calculator
Solve AC power problems: from voltage, current and power factor get kW, kVA, HP and BTU/h for single or three-phase circuits.
Single-phase: P = V·I·PF, S = V·I. Three-phase: P = √3·V·I·PF (line-to-line voltage), S = √3·V·I. Reactive power Q = √(S² − P²). Common household references: 100 W bulb ≈ 0.43 A at 230 V PF 1; 2 HP motor ≈ 1.5 kW output ≈ 2.2 kVA at PF 0.8.
About Watts Amps Volts Calculator
Solve AC power problems: from voltage, current and power factor get kW, kVA, HP and BTU/h for single or three-phase circuits.
Watts Amps Volts Calculator applies the standard formula for this calculation and returns a clean, readable result — no spreadsheet setup or manual working required.
How to Use Watts Amps Volts Calculator
- Enter your numbers in the input fields shown above.
- Choose any options (units, rounding, precision) if the tool offers them.
- The result updates automatically — no button needed.
- Copy the answer or reset the fields to start a new calculation.
Key Features
- Instant results with a clear, readable output format.
- Handles decimals, percentages and large numbers cleanly.
- Fast and private — every calculation runs on your device.
Frequently Asked Questions
What formula does Watts Amps Volts Calculator use?
Watts Amps Volts Calculator uses the standard, widely accepted formula for this calculation. Results are rounded only for display, so they are reliable for homework, planning and quick checks.
Is Watts Amps Volts Calculator free to use?
Yes. Watts Amps Volts Calculator is completely free with unlimited use — no account, download or payment required.
Is my data uploaded to a server?
No. Watts Amps Volts Calculator runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.
Does Watts Amps Volts Calculator work on mobile?
Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.