UnitConvConvert
Power

Convert watts to BTU per hour

1 W=3.41214BTU/h

Use the converter below to change any watts value into BTU per hour instantly — with formula, conversion table, and real-world examples.

3.412142

Conversion formula

Forward
BTU per hour = watts × 3.41214
Reverse
watts = BTU per hour × 0.2931

Example: 10 W × 3.41214 = 34.1214 BTU/h.

About both units

From

Watt

W

The watt is the SI unit of power — 1 joule per second. Named after James Watt. Common examples: LED bulb 5–10 W, laptop 45–100 W, kettle 2000–3000 W, car engine 50,000+ W.

Real-world: LED bulb: 5–10 W. Laptop: 45 W. Kettle: 2200 W. Oven: 2000 W. Sun per m² on Earth: 1361 W/m².
Read full watt reference →
To

BTU per Hour

BTU/h

BTU per hour equals 0.293 watts. It is the standard power unit for US HVAC — air conditioners, heaters and boilers. A 24,000 BTU/h AC provides 7 kW of cooling.

Real-world: Small window AC: 5000 BTU/h. Central AC: 24,000 BTU/h. Home furnace: 80,000 BTU/h.
Read full btu per hour reference →

Watt to BTU per Hour conversion table

Common watts to BTU per hour values for quick reference.

Watt (W)BTU per Hour (BTU/h)
1 W3.41214 BTU/h
5 W17.0607 BTU/h
10 W34.1214 BTU/h
50 W170.607 BTU/h
100 W341.214 BTU/h
500 W1,706.07 BTU/h
1,000 W3,412.14 BTU/h
5,000 W17,060.71 BTU/h
10,000 W34,121.42 BTU/h
50,000 W170,607.08 BTU/h

Tips & common mistakes

Quick tips

  • 1 W = 1 J/s = 1 V × 1 A (for DC).
  • LED lighting: 10× more efficient than incandescent.
  • For home appliances, rating × hours used = kWh.

Avoid these

  • Confusing watts (power) with joules (energy).
  • Assuming "100 W bulb" for LED — old incandescent rating.
  • Mixing W with V or A — different quantities.

Frequently asked questions

How many BTU per hour in a watt?
One watt equals 3.41214 BTU per hour.
How do I convert watts to BTU per hour?
Multiply the watt value by 3.41214 to get the equivalent in BTU per hour.
What is 100 watts in BTU per hour?
100 watts equals 341.214 BTU per hour.
Is a watt bigger than a btu per hour?
Yes. 1 watt equals 3.41214 BTU per hour, so one watt is larger.
How to convert watts to BTU per hour without a calculator?
Multiply by 3.41 for a quick estimate; use a calculator for precise results.

Related power conversions

📊 See full comparison matrix →

More from Watt

W → kW
1 = 0.001 kW
W → MW
1 = 1.0000e-6 MW
W → hp
1 = 0.001341 hp
W → PS
1 = 0.00136 PS
W → ft·lbf/s
1 = 0.7376 ft·lbf/s
W → VA
1 = 1 VA

More to BTU per Hour

kW → BTU/h
1 = 3,412.14 BTU/h
MW → BTU/h
1 = 3,412,141.64 BTU/h
hp → BTU/h
1 = 2,544.43 BTU/h
PS → BTU/h
1 = 2,509.63 BTU/h
ft·lbf/s → BTU/h
1 = 4.62624 BTU/h
VA → BTU/h
1 = 3.41214 BTU/h

Conversions in other categories

WeightKilogram → PoundLengthKilometer → MileTemperatureCelsius → FahrenheitVolumeLiter → US GallonAreaSquare Meter → Square FootSpeedKilometer per Hour → Mile per HourEnergyKilojoule → KilocaloriePressureBar → Pound per Square Inch