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

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

BTU/h → W Converter

Popular BTU/h to W Values

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

BTU/Hour to Watt Conversion Table

BTU/Hour (BTU/h)Watt (W)
0.1 BTU/h0.029307 W
0.5 BTU/h0.146535 W
1 BTU/h0.29307 W
2 BTU/h0.58614 W
5 BTU/h1.46535 W
10 BTU/h2.9307 W
20 BTU/h5.8614 W
50 BTU/h14.6535 W
100 BTU/h29.307 W
200 BTU/h58.614 W
500 BTU/h146.535 W
1000 BTU/h293.07 W
5000 BTU/h1465.35 W
10000 BTU/h2930.7 W

How to Convert BTU/Hour to Watt

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

W = BTU/h × 0.29307

Reverse formula — Watt to BTU/h:

BTU/h = W × 3.41214

Step-by-step example — Convert 12,000 BTU/h to Watts:

W = 12,000 × 0.29307
W = 3,516.85 W (= 3.517 kW)

Common examples:

What is BTU/Hour?

BTU/Hour (British Thermal Units per hour) is a unit of power widely used in the US HVAC industry. One BTU is the amount of heat needed to raise one pound of water by 1°F. BTU/h tells you how much heat energy an appliance produces or removes every hour. Air conditioners, furnaces, water heaters, and boilers are commonly rated in BTU/h in the United States.

What is Watt?

The watt (W) is the SI standard unit of power used worldwide. Named after Scottish inventor James Watt, it measures how fast energy is used or generated. Every electrical appliance — from a 10W LED bulb to a 2000W geyser — is rated in watts. Your electricity bill is calculated in kilowatt-hours (kWh) — 1 kWh = 1000W running for 1 hour.

AC Capacity — BTU/h to Watts Chart

Most practical use of this conversion is for air conditioner sizing:

AC CapacityBTU/HourWatts (W)Kilowatts (kW)
0.75 ton9,000 BTU/h2,637.6 W2.638 kW
1.0 ton12,000 BTU/h3,516.8 W3.517 kW
1.5 ton18,000 BTU/h5,275.3 W5.275 kW
2.0 ton24,000 BTU/h7,033.7 W7.034 kW
2.5 ton30,000 BTU/h8,792.1 W8.792 kW
3.0 ton36,000 BTU/h10,550.5 W10.551 kW

How to Calculate AC Electricity Cost Using BTU/h to Watts

Here is a practical example for calculating your AC electricity bill:

Example: 1.5 ton AC (18,000 BTU/h) running 8 hours/day
Step 1: 18,000 × 0.29307 = 5,275 W = 5.275 kW
Step 2: 5.275 kW × 8 hours = 42.2 kWh per day
Step 3: 42.2 × ₹8/unit = ~₹338 per day

BTU/h to Watts — General Reference Chart

BTU/Hour (BTU/h)Watts (W)
100 BTU/h29.31 W
500 BTU/h146.54 W
1,000 BTU/h293.07 W
3,412 BTU/h1,000 W (1 kW)
5,000 BTU/h1,465.35 W
10,000 BTU/h2,930.7 W
12,000 BTU/h3,516.85 W
34,121 BTU/h10,000 W (10 kW)
100,000 BTU/h29,307 W (29.3 kW)

Frequently Asked Questions

How do I convert BTU/hour to watts?

Multiply BTU/h by 0.29307. Formula: W = BTU/h × 0.29307. Example: 5,000 BTU/h × 0.29307 = 1,465.35 W.

How many BTU/hour is 1 watt?

1 watt = 3.41214 BTU/hour. This is the fundamental conversion factor between these two units.

What is 12,000 BTU/h in watts?

12,000 BTU/h = 3,516.85 watts = 3.517 kW. This is a 1-ton air conditioner's cooling capacity in watts.

What is 5,000 BTU/h in watts?

5,000 BTU/h = 1,465.35 watts = 1.465 kW. This is equivalent to a small window air conditioner suitable for rooms up to 150 sq ft.

What is the difference between BTU/h and watt?

Both measure power. Watt is the global SI standard for all electrical appliances. BTU/h is the imperial unit used mainly in US HVAC for heating and cooling equipment. 1 W = 3.412 BTU/h.

How do I calculate AC electricity cost from BTU/h?

Convert BTU/h to kW (multiply by 0.00029307), then multiply by hours used per day to get kWh per day. Multiply kWh by your electricity rate to get the daily cost. Example: 12,000 BTU/h AC for 8 hrs = 3.517 × 8 = 28.14 kWh/day.