Electrical Calculations: Ohm's Law and Circuits Explained
The everyday electrical maths every hobbyist and electrician uses — Ohm's law, power, sizing a resistor, combining resistors, and the basics of current, voltage and safe wiring.
Watts to Amps Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Current
4.348
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Watts to Amps Calculator
The Watts to Amps Calculator works out your current in an instant. Enter power and voltage and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the power.
- Enter the voltage.
- Read off your current — the calculator updates automatically, with no button to press.
Formula
The Watts to Amps Calculator uses the formula:
Current = Power ÷ Voltage
Worked example
For example, with power of 1,000 W and voltage of 230 V, the current is 4.348.
| Power | 1,000 W |
|---|---|
| Voltage | 230 V |
| Current | 4.348 |
|---|
Results are estimates for educational use, not professional advice.
Frequently asked questions
Divide the power in watts by the voltage. A 1000 W appliance on 230 V draws about 4.35 amps.
Current depends on both power and voltage. The same wattage draws more current at a lower voltage and less at a higher one.
For DC and resistive AC loads, yes. For reactive AC loads, divide further by the power factor to get the true current.
Choose a rating above the calculated current, allowing for surges. Always follow local electrical codes and consult an electrician.
The Watts to Amps Calculator uses the formula: Current = Power ÷ Voltage. For example, with power of 1,000 W and voltage of 230 V, the current is 4.348.
Enter the power. Enter the voltage. Read off your current — the calculator updates automatically, with no button to press.
Related guides
Watts to Amps Table: Current by Power
Reference table of current for Watts to Amps across a range of power values — exact, engine-computed figures you can read off at a glance.
How to Calculate Watts to Amps: Formula, Steps & Examples
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