Calorie to BTU Converter (cal to BTU)

How to Convert Calorie to BTU

Formula: BTU = Calorie × 0.00396565

Example: 1 cal = 0.00396565 BTU

You can also use the interactive converter above. Simply enter any Calorie value and the equivalent BTU value will appear instantly. Click the ⇄ button to reverse the conversion.

A little context on Calorie and BTU helps this conversion stick, along with some frequently asked questions below.

Step-by-step example — Convert 1000 cal to BTU:

What is Calorie and BTU?

A Calorie (cal) is a small energy unit originally defined as the heat needed to raise one gram of water by one degree Celsius.

A BTU (British Thermal Unit) is an imperial energy unit, used mainly for rating heating and cooling equipment.

Real World Uses of Calorie to BTU Conversion

• Calorie: Commonly used for used in scientific calorimetry experiments.
• BTU: Commonly used for rating the cooling capacity of air conditioners.
• Calorie: Commonly used in chemistry to describe the heat released or absorbed in small reactions.
• BTU: Commonly used in the US for rating air conditioner and furnace heating/cooling capacity.

Frequently Asked Questions

What is the formula to convert Calorie to BTU?

The formula is: BTU = Calorie x 0.00396565. Multiply any Calorie value by 0.00396565 to get the equivalent in BTU.

What is 1 Calorie in BTU?

1 cal = 0.00396565 BTU.

How many Calorie are in 1 BTU?

1 BTU = 252.165470982058 cal.

Is Calorie bigger or smaller than BTU?

Calorie is smaller than BTU. 1 BTU = 252.165470982058 cal.

What is 500 cal in BTU?

500 cal = 1.982825621 BTU.

What is 12000 BTU in cal?

12000 BTU = 3,025,984.704 cal.

Is a food Calorie the same as a chemistry calorie?

No — a food "Calorie" with a capital C is actually a kilocalorie, 1,000 times larger than the small calorie used in chemistry and physics.