Convert

Watt to BTU per hour

PS and hp are not identical. Vehicle data often uses metric horsepower, while US/UK contexts often use mechanical horsepower.

Unit console

Convert units with formula, context and precision

UnitCloud is a local measurement lab for everyday work, engineering, IT, energy, mobility and design. Every conversion shows result, formula, base unit, rounding and the common mistake.

What do you want to convert?

From1 W

Result3.41214163 BTU/h

Factor1 W = 3.4121416331 BTU/h

Source basisBIPM SI Brochure · NIST Guide to SI Appendix B

Examples

01100 W = 341.21416331 BTU/h

Example value from the reference table. Internal calculation uses stored factors; display output is rounded.

02Common mistake

PS and hp are not identical. Vehicle data often uses metric horsepower, while US/UK contexts often use mechanical horsepower.

03Base unit: W

base. Then the value is converted through the base unit W into BTU per hour.

Table

Watt	BTU per hour
100	341.21416331
500	1,706.07081656
1,000	3,412.14163313

Formula

base. Then the value is converted through the base unit W into BTU per hour.

Sources

BIPM SI BrochureSI base units, prefixes and official SI context.NIST Guide to SI Appendix BNIST conversion-factor method and non-SI factors.

Related conversions

Kilowatt to Metric horsepowerkW → PSPower Metric horsepower to KilowattPS → kWPower Kilowatt to Mechanical horsepowerkW → hpPower

Search and practice paths

FormulaTableExamplesCommon mistakeEveryday/engineeringExcel/CSVBatch converterPrint view

Factor origin

Factors come from the stored source family and are not derived from rounded display values.

Rounding rule

UnitCloud keeps calculating with stored factors and rounds only the displayed output by selected precision.

When not to use

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.

Citation

Citation note: UnitCloud, conversion with formula, sources current as of May 2026. Power. Source basis: BIPM SI Brochure · NIST Guide to SI Appendix B.

Common questions

What is the factor for Watt to BTU per hour?

1 W = 3.4121416331 BTU/h

Which formula does Watt to BTU per hour use?

base. Then the value is converted through the base unit W into BTU per hour.

When should I verify the result?

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.