Calorie to British thermal unit converter (cal to btu)

Conversion Formula

1 cal = 0.003966 btu

Step-by-Step Explanation

1. Understand the base relationship:
   1 Calorie = 4.184 joules
   1 British Thermal Unit = 1.06k joules
2. Establish the conversion factor:
   1 cal = (4.184 J) / (1.06k J/btu) = 0.003966 btu
3. Apply the conversion:
   Multiply the value in cal by 0.003966 to get the equivalent in btu

Example Conversion

Convert 5 cal to btu:

5 cal × 0.003966 = 0.019828 btu