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Watt to BTU/Hour Converter (W to BTU/h)

Convert Watt (W) to BTU/Hour (BTU/h) instantly. Enter any value and get the result immediately.

W → BTU/h Converter

Popular W to BTU/h Values

1 W to BTU/h 2 W to BTU/h ↩ Reverse: BTU/h to W

Watt to BTU/Hour Conversion Table

Watt (W)BTU/Hour (BTU/h)
0.1 W0.34121541 BTU/h
0.5 W1.70607705 BTU/h
1 W3.41215409 BTU/h
2 W6.82430819 BTU/h
5 W17.06077046 BTU/h
10 W34.12154093 BTU/h
20 W68.24308186 BTU/h
50 W170.60770464 BTU/h
100 W341.21540929 BTU/h
200 W682.43081858 BTU/h
500 W1706.07704644 BTU/h
1000 W3412.15409288 BTU/h
5000 W17,060.7705 BTU/h
10000 W34,121.5409 BTU/h

How to Convert Watt to BTU/Hour

The formula to convert Watt (W) to BTU/Hour (BTU/h) is:

BTU/h = W × 3.41215

Reverse formula — BTU/h to W:

W = BTU/h ÷ 3.41215   (or: W = BTU/h × 0.29307)

Step-by-step example — Convert 3,517 W to BTU/h:

BTU/h = 3,517 × 3.41215
BTU/h = 12,000 BTU/h (= 1 ton AC)

Common examples:

What is Watt?

The watt (W) is the SI base unit of power — named after Scottish inventor James Watt. It represents one joule of energy per second. Every electrical appliance is rated in watts — from a 10W LED bulb to a 2,000W electric geyser. Your electricity bill is calculated in kilowatt-hours (kWh) — where 1 kWh = 1,000W running for 1 hour = ₹7-9 in India.

What is BTU/Hour?

BTU/Hour (British Thermal Units per hour) measures how fast heat energy is transferred. One BTU is the heat needed to raise one pound of water by 1°F. BTU/h is primarily used in the US HVAC industry for rating air conditioners, furnaces, and heat pumps. In India, AC capacity is often expressed in "tons" — where 1 ton = 12,000 BTU/h = 3,517 W.

Home Appliances — Watts to BTU/h Chart

ApplianceWatts (W)BTU/Hour (BTU/h)
LED bulb10 W34.12 BTU/h
Ceiling fan75 W255.91 BTU/h
Laptop65 W221.79 BTU/h
Refrigerator150 W511.82 BTU/h
LED TV (43 inch)100 W341.22 BTU/h
Microwave oven1,200 W4,094.58 BTU/h
Electric geyser2,000 W6,824.31 BTU/h
1-ton AC3,517 W12,000 BTU/h
1.5-ton AC5,275 W18,000 BTU/h
2-ton AC7,034 W24,000 BTU/h

AC Sizing — Watts to BTU/h

This is the most practical use of this conversion in India:

AC CapacityWatts (W)BTU/HourRoom Size
0.75 ton2,638 W9,000 BTU/hUp to 100 sq ft
1.0 ton3,517 W12,000 BTU/h100–150 sq ft
1.5 ton5,275 W18,000 BTU/h150–200 sq ft
2.0 ton7,034 W24,000 BTU/h200–300 sq ft
2.5 ton8,792 W30,000 BTU/h300–400 sq ft
3.0 ton10,551 W36,000 BTU/h400–500 sq ft

Frequently Asked Questions

How do I convert watts to BTU/hour?

Multiply W by 3.41215. Formula: BTU/h = W × 3.41215. Example: 2,000 W × 3.41215 = 6,824.3 BTU/h.

How many BTU/hour is 1 watt?

1 watt = 3.41215 BTU/hour. This is the fundamental conversion factor — memorizing this makes all W to BTU/h calculations easy.

What is 3,517 watts in BTU/hour?

3,517 W = 12,000 BTU/h. This is the cooling capacity of a 1-ton air conditioner — the most common AC size in India.

What is 1,000 watts in BTU/hour?

1,000 W (1 kW) = 3,412.15 BTU/h. Every kilowatt equals 3,412 BTU/h — a useful reference for HVAC calculations.

How do I convert AC watts to BTU/h?

Multiply the AC wattage by 3.41215. Example: 1.5-ton AC = 5,275 W → 5,275 × 3.41215 = 18,000 BTU/h. This confirms 1.5-ton = 18,000 BTU/h.

What is 2,000 watts in BTU/hour?

2,000 W = 6,824.31 BTU/h. Formula: 2,000 × 3.41215 = 6,824.3 BTU/h. This is the heat output of a typical electric geyser running at full power.