British thermal units to Calories Converter

British thermal units

The British thermal unit (BTU) is a unit of energy approximately equal to 1,055.06 joules, defined as the energy required to raise the temperature of one pound of water by one degree Fahrenheit. It remains the standard unit for heating and cooling capacity in HVAC systems in the United States: air conditioners and furnaces are rated in BTU/hour. A typical residential air conditioner is rated at 5,000–24,000 BTU/h. One BTU equals approximately 0.000293 kWh.

Calories

The calorie (cal) is a unit of energy equal to exactly 4.184 joules, defined as the energy required to raise the temperature of one gram of water by one degree Celsius at 15 °C. This is the thermochemical calorie — distinct from the food calorie (written as Cal or kcal), which is 1,000 times larger. The calorie originated in 19th-century thermodynamics before the joule was established as the SI standard, and persists in chemistry, biology, and food science.

British thermal units (BTU) to Calories (cal) - Conversion Table
British thermal units (BTU)	Calories (cal)
0.1 BTU	25.2164 cal
1 BTU	252.1644 cal
2 BTU	504.3288 cal
3 BTU	756.4932 cal
5 BTU	1,260.822 cal
10 BTU	2,521.644 cal
20 BTU	5,043.288 cal
30 BTU	7,564.932 cal
50 BTU	12,608.22 cal
100 BTU	25,216.4401 cal
1000 BTU	252,164.4007 cal

Frequently Asked Questions (FAQ)

How many calories are in 1 British thermal units?

1 British thermal units (BTU) is exactly 252.164 calories (cal).

How do I convert British thermal units to calories?

Multiply the value in British thermal units by 252.164 to get the result in calories. Or use the converter above — type any number and see the result instantly.

Convert British thermal units (BTU) to other units of Energy

Conversions from British thermal units
‣ British thermal units (BTU) to Joules (J)
‣ British thermal units (BTU) to Kilojoules (kJ)
‣ British thermal units (BTU) to Megajoules (MJ)
‣ British thermal units (BTU) to Calories (cal)
‣ British thermal units (BTU) to Kilocalories (kcal)
‣ British thermal units (BTU) to Watt-hours (W·h)
‣ British thermal units (BTU) to Kilowatt-hours (kW·h)
‣ British thermal units (BTU) to British thermal units (BTU)
‣ British thermal units (BTU) to Electronvolts (eV)
‣ British thermal units (BTU) to Ergs (erg)

Conversions to British thermal units
‣ Joules (J) to British thermal units (BTU)
‣ Kilojoules (kJ) to British thermal units (BTU)
‣ Megajoules (MJ) to British thermal units (BTU)
‣ Calories (cal) to British thermal units (BTU)
‣ Kilocalories (kcal) to British thermal units (BTU)
‣ Watt-hours (W·h) to British thermal units (BTU)
‣ Kilowatt-hours (kW·h) to British thermal units (BTU)
‣ British thermal units (BTU) to British thermal units (BTU)
‣ Electronvolts (eV) to British thermal units (BTU)
‣ Ergs (erg) to British thermal units (BTU)