Energy Converter

Calorie to British thermal unit
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Converting between calories and british thermal units is essential in physics, nutrition, electrical engineering, and heating calculations. Energy units bridge different domains: joules in physics, calories in nutrition, kilowatt-hours in electricity, and BTUs in heating.

Also convert to: J kJ MJ kcal Wh kWh BTU

42.99952 cal = 0.170522 btu

42.99952 (forty-two) calorie(s) is equal to 0.170522 (zero) british thermal unit(s)

What is calorie?

The calorie (cal) equals 4.184 joules. It was originally defined as the energy needed to raise one gram of water by one degree Celsius. Small calories are used in chemistry and physics.

What is british thermal unit?

The British thermal unit (BTU) equals approximately 1,055 joules. It is used in the United States for rating heating and cooling systems, water heaters, and the energy content of fuels.

How to convert cal to btu

To convert Calorie to British thermal unit, multiply the value by 0.0039656668.
42.99952 cal × 0.0039656668 = 0.170522 btu

Common Conversions

cal btu (British thermal unit) Description
1 cal 0.003966 BTU 1 Calorie(s) = 0.003966 British thermal unit(s)
2 cal 0.007931 BTU 2 Calorie(s) = 0.007931 British thermal unit(s)
5 cal 0.019828 BTU 5 Calorie(s) = 0.019828 British thermal unit(s)
10 cal 0.039657 BTU 10 Calorie(s) = 0.039657 British thermal unit(s)
25 cal 0.099142 BTU 25 Calorie(s) = 0.099142 British thermal unit(s)
50 cal 0.198283 BTU 50 Calorie(s) = 0.198283 British thermal unit(s)
100 cal 0.396567 BTU 100 Calorie(s) = 0.396567 British thermal unit(s)
250 cal 0.991417 BTU 250 Calorie(s) = 0.991417 British thermal unit(s)
500 cal 1.982833 BTU 500 Calorie(s) = 1.982833 British thermal unit(s)
1000 cal 3.965667 BTU 1000 Calorie(s) = 3.965667 British thermal unit(s)
2500 cal 9.914167 BTU 2500 Calorie(s) = 9.914167 British thermal unit(s)
5000 cal 19.828334 BTU 5000 Calorie(s) = 19.828334 British thermal unit(s)
10000 cal 39.656668 BTU 10000 Calorie(s) = 39.656668 British thermal unit(s)

Convert Calorie to other units

cal Unit Description
42.99952 cal 179.909992 J Joule
42.99952 cal 0.17991 kJ Kilojoule
42.99952 cal 0.00018 MJ Megajoule
42.99952 cal 0.043 kcal Kilocalorie
42.99952 cal 0.049975 Wh Watt-hour
42.99952 cal 0.00005 kWh Kilowatt-hour
42.99952 cal 0.170522 BTU British thermal unit

More British thermal unit conversions

1 cal 2 cal 3 cal 4 cal 5 cal 6 cal 7 cal 8 cal 9 cal 10 cal 11 cal 12 cal 13 cal 14 cal 15 cal 16 cal 17 cal 18 cal 19 cal 20 cal 25 cal 30 cal 40 cal 50 cal 60 cal 70 cal 80 cal 90 cal 100 cal 200 cal 300 cal 500 cal 1000 cal 2000 cal 5000 cal 10000 cal

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