How many kilowatt-hours is 1 BTU?

1 BTU (International Table) equals exactly 0.00029307107 kWh. This comes from: 1 BTU = 1055.05585262 joules, and 1 kWh = 3,600,000 joules, so 1055.05585262 / 3,600,000 ≈ 0.00029307107 kWh.

How do I convert BTU to kilowatt-hours manually?

Multiply the BTU value by 0.00029307107. For example, 10,000 BTU × 0.00029307107 ≈ 2.93 kWh. To convert kWh back to BTU, divide by 0.00029307107 (or multiply by 3412.14).

What is the difference between BTU and kilowatt-hour?

Both measure energy. A BTU (British Thermal Unit) is the heat needed to raise 1 pound of water by 1°F — about 1055 joules. A kilowatt-hour is the energy used by a 1-kilowatt device running for one hour — exactly 3,600,000 joules. BTU is common in US HVAC specs; kWh is the standard unit on electricity bills.

How do I convert BTU/hr to kW?

BTU/hr is a power unit (energy per hour). Divide by 3412.14 to get kilowatts. For example, 12,000 BTU/hr ÷ 3412.14 ≈ 3.52 kW. This is a separate conversion from BTU (energy) to kWh (energy).

Why is kWh used for electricity bills instead of BTU?

Kilowatt-hours are the SI-aligned unit for electrical energy and are universally used by utilities worldwide. BTU remains common in US heating and cooling equipment specs because the HVAC industry adopted it before electricity became dominant. Converting between them is routine when comparing gas and electric heating or cooling systems.

BTU to Kilowatt Hours Converter

Name: BTU to Kilowatt Hours Converter
Availability: InStock
Author: Nham Vu

Enter a BTU value and get the kilowatt-hour equivalent instantly. Reverse kWh-to-BTU conversion and a reference table included.

Converter

Energy in BTU

Result in kilowatt-hours (kWh)

Reverse: kilowatt-hours to BTU

Energy in kilowatt-hours (kWh)

Result in BTU

Reference Table

BTU Kilowatt-hours (kWh)

100 BTU 0.029307 kWh

500 BTU 0.146536 kWh

1,000 BTU 0.293071 kWh

5,000 BTU 1.4654 kWh

10,000 BTU 2.9307 kWh

20,000 BTU 5.8614 kWh

50,000 BTU 14.6536 kWh

100,000 BTU 29.3071 kWh

250,000 BTU 73.2678 kWh

500,000 BTU 146.5355 kWh

1,000,000 BTU 293.0711 kWh

Formula: kWh = BTU × 0.00029307107 • BTU = kWh ÷ 0.00029307107

Summary

Enter a BTU value and get the kilowatt-hour equivalent instantly. Reverse kWh-to-BTU conversion and a reference table included.

How it works

Enter an energy value in BTU in the top input field.
The kilowatt-hour result appears instantly — no button press needed.
Use the reverse field to convert kilowatt-hours back to BTU.
Click "Copy" next to any result to copy it to your clipboard.
Check the reference table for common BTU-to-kWh values at a glance.

Use cases

Size a home air conditioner by converting BTU cooling capacity to kWh electricity draw.
Estimate monthly energy costs by converting a furnace BTU rating to kWh for utility billing.
Compare air conditioner efficiency ratings across BTU and kilowatt-hour metrics.
Convert natural gas heating output from BTU to kWh for energy audits.
Translate HVAC contractor BTU specs to kWh for solar panel sizing.
Convert boiler or heat pump BTU ratings to kWh for carbon footprint calculations.
Cross-check generator fuel consumption in BTU against kWh electricity output.
Convert thermal energy storage values from BTU to kWh for building automation systems.

Frequently Asked Questions

Last updated: 2026-07-22 · Reviewed by Nham Vu