Which specific heat units are supported?

The tool supports J/(kg·K), kcal/(kg·°C), and BTU/(lb·°F).

Are kcal/(kg·°C) and BTU/(lb·°F) numerically equal?

Yes. In this converter, 1 kcal/(kg·°C) equals 1 BTU/(lb·°F) numerically.

What is the conversion basis?

Conversions use J/(kg·K), with 1 kcal/(kg·°C) and 1 BTU/(lb·°F) equal to 4186.8 J/(kg·K).

Can I enter zero or a negative value?

Zero is allowed, but the value must not be negative.

How many decimal places can the result use?

You can select between 0 and 10 decimal places.

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Specific Heat Capacity Converter (J/(kg·K) / kcal / BTU)

Convert specific heat capacity between J/(kg·K) (joule per kilogram-kelvin, SI base, = J/(kg·°C)), kcal/(kg·°C) (1 = 4186.8 J/(kg·K)), and BTU/(lb·°F) (1 = 4186.8 J/(kg·K)). Key identity: 1 kcal/(kg·°C) = 1 BTU/(lb·°F) — numerically equal because the energy/mass·temperature factors cancel. Converts via J/(kg·K) and lists all three equivalents. Reference values: water ≈ 4186, air cp ≈ 1005, aluminum ≈ 900, iron ≈ 450 J/(kg·K).

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2 examples

Water: 4186.8 J/(kg·K) → 1 kcal/(kg·°C), 1 BTU/(lb·°F)

Water at 15°C has cp = 4186.8 J/(kg·K) by definition of the IT calorie. ÷ 4186.8 = 1.000 kcal/(kg·°C), 1.000 BTU/(lb·°F). The canonical reference value.

{"result":"4186.8 J/(kg·K) = 1 kcal/(kg·°C). All units: J/(kg·K)=4186.8, kcal/(kg·°C)=1, BTU/(lb·°F)=1.","metadata":{"input":{"inputUnit":"J/(kg·K)","value":4186.8,"outputUnit":"kcal/(kg·°C)"},"result":{"outputValue":1,"outputUnit":"kcal/(kg·°C)","JkgK":4186.8,"kcal":1,"BTU":1}}}

Air cp: 0.240 BTU/(lb·°F) → J/(kg·K) ≈ 1004.832

Air at 25°C has cp ≈ 1005 J/(kg·K) ≈ 0.240 BTU/(lb·°F). 0.240 × 4186.8 = 1004.832 J/(kg·K), 0.240 kcal/(kg·°C).

{"result":"0.24 BTU/(lb·°F) = 1004.832 J/(kg·K). All units: J/(kg·K)=1004.832, kcal/(kg·°C)=0.24, BTU/(lb·°F)=0.24.","metadata":{"input":{"inputUnit":"BTU/(lb·°F)","value":0.24,"outputUnit":"J/(kg·K)"},"result":{"outputValue":1004.832,"outputUnit":"J/(kg·K)","JkgK":1004.832,"kcal":0.24,"BTU":0.24}}}

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4 options

SettingsAdjust formats, ranges, numbers, and modes.4

Input unitselectOptionalValuenumberRequiredSpecific heat capacity in the selected Input unit. Must be non-negative.Output unitselectOptionalDecimal PlacesnumberOptional

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Specific Heat Capacity Converter (J/(kg·K) / kcal / BTU)

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Examples

1. Water specific heat conversion

2. Air specific heat in SI units

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