Convert 1 Per Btu (IT) to Per Calorie

1 Btu⁻¹ (Per Btu (IT)) is equal to 0.003968320719327655 cal⁻¹ (Per Calorie). To convert from Per Btu (IT) to Per Calorie, multiply by 0.003968320719327655 or divide by 251.99576111112012.

• 1 Btu⁻¹ × 0.0039683207193277 = 0.0039683207193277 cal⁻¹
• 1 Btu⁻¹ ÷ 251.99576111112 = 0.0039683207193277 cal⁻¹