sumivo

Sumivo · Converters

Power Converter

Convert through one Watt (SI) baseline and round only the displayed value.

01 / CONVERT POWER

0.74569987

CONVERTED VALUE

1 hp = 0.74569987 kW

Conversion constant: 1 hp = 0.74569987 kW

Converted value
0.74569987 kW
Baseline (W)
745.69987158 W

Calculation trace

  1. 1 hp → W
    745.69987158 W
    Normalise to base unit
  2. 745.699872 W → kW
    0.74569987 kW
    Convert to target unit
SOURCERELATIONCONVERTED
1 hp=0.74569987 kW
5 hp=3.72849936 kW
10 hp=7.45699872 kW
25 hp=18.64249679 kW
100 hp=74.56998716 kW

Maintained by Jack Shi

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How it works

The input is normalised to the normalization unit (W) using fixed NIST SP 811 conversion factors, then converted to the target unit. Same-unit conversions return the input exactly.

Assumptions & limits

  • SI prefixes and metric horsepower use defined factors. Mechanical horsepower, BTU/hour and foot-pound/second factors are stored as finite decimal approximations.
  • Calculations use JavaScript double-precision floating-point arithmetic, which can introduce small rounding errors; display formatting may round further.

Verified runs

Synthetic examples executed at build revision 24533ff on . Cards round decimal results to 6 significant figures; matching uses full precision and the tolerance below. Matches cover the displayed fields, not every possible input or clinical or engineering validation.

  • Inputs: Value: 1 hp; From unit: hp; To unit: W

    Result: Value: 745.7 W (expected Value: 745.7 W) ✓

  • Inputs: Value: 0 hp; From unit: hp; To unit: W

    Result: Value: 0 W (expected Value: 0 W) ✓

  • Inputs: Value: 1 kW; From unit: kW; To unit: W

    Result: Value: 1000 W (expected Value: 1000 W) ✓

How these runs were checked

Method: power-linear@1.0.1. Expectations come from the listed test fixtures or hand arithmetic; they are not copied from these executions. Omitted optional inputs use the method defaults. Run dates record execution, not expert review or fresh measurements.

Download all verified runs (JSON) — full inputs, returned values, expectations, timestamps and buildRevision.

  • normal: . Absolute tolerance: 5e-7. Text and booleans match exactly. Full-precision result: Value: 745.6998715822702 W. Expected: Value: 745.6998715822702 W. Expectation: packages/calculator-core/tests/power-converter.test.ts
  • boundary: . Absolute tolerance: 0. Text and booleans match exactly. Full-precision result: Value: 0 W. Expected: Value: 0 W. Expectation: Hand arithmetic: 0 hp × the finite conversion factor = 0 W.
  • sensitivity: . Absolute tolerance: 5e-7. Text and booleans match exactly. Full-precision result: Value: 1000 W. Expected: Value: 1000 W. Expectation: packages/calculator-core/tests/power-converter.test.ts

Reproduce from the source checkout with pnpm --filter @sumivo/web gen:verified-runs. A rebuild changes execution times; the revision identifies its Git starting point, including any uncommitted changes made for that build.

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FAQ

Why convert through a base unit?
Normalising every unit to W first means one small, checkable factor table covers every from/to pair with floating-point rounding possible.
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Related calculators

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SOURCES