Calculating your horsepower (hp) is straightforward once you know the Power Converter formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Power Converter.
What is Power Converter?
The Power Converter calculation tells you your horsepower (hp) from a few simple inputs. The figure you are solving for here is the horsepower (hp).
The Power Converter formula
This calculation combines several inputs through a multi-step method rather than a single one-line formula. Enter the values below and the calculator resolves each step in order. The inputs it needs are:
- Power — a number. Example: 1.
- From unit — one of: Watt (W), Kilowatt (kW), Horsepower, mechanical (hp), Metric horsepower (PS), BTU per hour. Example: Kilowatt (kW).
How to calculate it step by step
- Write down the power (for example, 1).
- Choose the from unit (for example, Kilowatt (kW)).
- Apply the formula above to get your horsepower (hp).
- Double-check the result with the Power Converter.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Power | 1 |
| From unit | Kilowatt (kW) |
| Horsepower (hp) | 1.3410 |
| Kilowatt (kW) | 1.0000 |
| Watt (W) | 1,000.00 |
| Metric horsepower (PS) | 1.3596 |
With power of 1 and from unit of Kilowatt (kW), the horsepower (hp) works out to 1.3410.
Example 2
With power of 2 and from unit of Kilowatt (kW), the horsepower (hp) works out to 2.6820.
| Result | Value |
|---|---|
| Horsepower (hp) | 2.6820 |
| Kilowatt (kW) | 2.0000 |
| Watt (W) | 2,000.00 |
| Metric horsepower (PS) | 2.7192 |
Example 3
With power of 5 and from unit of Kilowatt (kW), the horsepower (hp) works out to 6.7051.
| Result | Value |
|---|---|
| Horsepower (hp) | 6.7051 |
| Kilowatt (kW) | 5.0000 |
| Watt (W) | 5,000.00 |
| Metric horsepower (PS) | 6.7981 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Power Converter does it instantly, for free, with the formula and a worked example built in.
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