BTU to kWh Converter
Convert BTU to kilowatt-hours for HVAC, heating, and energy billing comparison.
How It Works
Formula: BTU to kWh = value × 0.00029307107
Example: 10000 BTU = 2.930711 kWh
Note: 1 BTU equals 0.000293071 kilowatt-hours, the conversion for US heating and cooling energy.
Common Uses
Quick Conversion Table
| BTU | kWh |
|---|---|
| 1 | 0.0003 |
| 5 | 0.0015 |
| 10 | 0.0029 |
| 50 | 0.0147 |
| 100 | 0.0293 |
| 500 | 0.1465 |
Rounding Rule
Rounded to 4 decimal places
Error Margin
±0.0001 kWh
Precision Guidance
For HVAC, round to 2 decimals. For billing, keep 3-4 decimals.
Common Mistakes
BTU measures energy, while BTU per hour measures power. Confirm whether a spec is BTU or BTU/h before converting.
Frequently Asked Questions
What is 10000 BTU in kWh?
10000 BTU equals 2.9307 kWh using the conversion 1 BTU = 0.000293071 kWh.
How do I convert BTU to kWh?
Multiply the BTU value by 0.00029307. For example, 3412 BTU × 0.00029307 = 1 kWh.
How many BTU in 1 kWh?
1 kilowatt-hour equals about 3412 BTU.
Is this for HVAC?
Yes, US air conditioners rate cooling in BTU, while energy bills use kWh.
Deep Dive Guide
BTU to KWH: Air Conditioner Energy Use for US Homeowners
Convert btu to kwh to estimate air conditioner energy use and cost. 1 BTU equals 0.000293071 kWh, so a 12000 BTU window AC uses about 3.52 kWh per hour.
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Exact Constants & Authoritative Sources
Every conversion on this page uses the fixed, internationally agreed constants below — drawn from NIST and the SI Brochure. No values are estimated or rounded as if exact. See the full list on our Sources & Standards page.
- EXACT1 mechanical horsepower (hp) = 745.6998715823 watts (exact, 550 ft·lbf/s)
- EXACT1 British thermal unit, IT (Btu) = 1055.05585262 joules (exact)
- EXACT1 Btu/h = 0.293071070172 watts (exact, Btu ÷ 3600 s)
- EXACT1 watt (W) = 1 joule per second (definition)
Common Pitfalls & How to Avoid Them
Mechanical hp vs. metric hp
Mechanical hp = 745.7 W. Metric (PS) hp = 735.5 W and electrical hp = 746 W. Engine specs may use any of these; always check which.
Btu IT vs. thermochemical
UnitFig uses the IT Btu (1055.05585262 J). The thermochemical Btu (1054.35 J) is ~0.07% smaller and used in some chemistry contexts — keep them separate.
A unit-conversion reference site has no manufacturer-specific or device calibration parameters, so "layered tuning" does not apply here. The only real error-handling is input validation: the converter rejects non-numeric, empty, or out-of-range entries and shows a clear message, then falls back to exact constants above. No estimated or rounded figures are ever presented as exact.
Authoritative sources for this page
- NIST (U.S. National Institute of Standards and Technology) — NIST SP 330 — The International System of Units (SI), 2019 edition
- BIPM (International Bureau of Weights and Measures) — SI Brochure — The International System of Units (9th edition)
Last Updated 2026 | This converter was reviewed for accuracy