Electrical Converter
From ampere to watt, from kW to horsepower or from watt to kWh: convert the key electrical units. For ampere–watt you enter the voltage (usually 230 V in Europe), and for energy the time in hours. That way you always get a correct, grounded answer instead of a rough rule of thumb.
Result
2,300 W
Power
Formula
P (W) = U (V) × I (A); E (kWh) = P (W) × t (h) ÷ 1000; 1 hp = 735.49875 W
Power (watt) is voltage (volt) times current (ampere), which is why ampere–watt conversion needs the voltage. Energy (kWh) is power times time: 1000 watts for 1 hour is 1 kWh. Metric horsepower is a fixed multiple: 1 hp = 735.49875 watts.
Step by step
- 1Choose what to convert (e.g. ampere → watt).
- 2Enter the value, plus voltage or time if asked.
- 3Read the result.
Worked examples
10 A at 230 V to watt
→ 2,300 W (10 × 230).
100 kW to hp
→ ≈ 135.96 hp.
Reference table
| Ampere (A) | Watt (W) | Example |
|---|---|---|
| 1 A | 230 W | Small fan |
| 4 A | 920 W | Toaster |
| 10 A | 2,300 W | Kettle |
| 16 A | 3,680 W | Standard household circuit |
| 25 A | 5,750 W | Heavy appliance / EV charger |
W = A × V. At 400 V (three-phase) the power is ~1.73× higher per phase.
| kW | hp / pk |
|---|---|
| 50 kW | 68 hp |
| 75 kW | 102 hp |
| 100 kW | 136 hp |
| 150 kW | 204 hp |
| 200 kW | 272 hp |
1 hp = 735.49875 W (metric horsepower).
Common mistakes
- Converting ampere to watt without the voltage; it cannot be done without volts.
- Confusing watt (power) and kWh (energy); energy needs time.
- Mixing metric hp and US hp (small difference).
When to use it
- Checking how many amps a 3,000 W appliance draws at 230 V.
- Converting engine power from kW to hp in a car listing.
- Estimating an appliance's energy use in kWh for your energy bill.
Frequently asked questions
How many watts is 1 ampere?
It depends on the voltage: W = A × V. At 230 V, 1 A equals 230 W.
How many hp is 100 kW?
About 135.96 hp (100,000 W ÷ 735.49875).
How do I convert watt to kWh?
Multiply the power in watts by the time in hours and divide by 1000. 2000 W × 3 h ÷ 1000 = 6 kWh.
Which voltage should I use?
For household use in Europe that is usually 230 V (single phase). For power circuits it is 400 V (three phase).
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