BTU per pound-degree Fahrenheit to Joules per kilogram-kelvin

Snapshot

1 BTU per pound-degree Fahrenheit equals 4,186.8 Joules per kilogram-kelvin. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.

Reference basis: This conversion uses a fixed factor based on physics reference unit model.
Example: For 0.1 BTU per pound-degree Fahrenheit, the result equals 418.68 Joules per kilogram-kelvin.
Use the reverse page if you need the opposite direction with the same basis.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Converter Calculator

4,186.8 Joules per kilogram-kelvin (J/(kg·K))

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Explanation

Formula: Joules per kilogram-kelvin = BTU per pound-degree Fahrenheit × 4,186.8. Why: the route normalizes to joules per kilogram-kelvin, then applies the fixed BTU energy definition, the pound mass definition, and the Fahrenheit-to-kelvin interval scaling.

BTU per pound-degree Fahrenheit (BTU/(lb·°F)): an imperial engineering heat-capacity unit used in HVAC, combustion, and US thermal property references.

Joules per kilogram-kelvin (J/(kg·K)): the standard SI-style specific heat capacity unit expressing how many joules are needed to raise one kilogram by one kelvin.

This route is useful when comparing SI thermal property data with US engineering or HVAC references that report specific heat in BTU per pound per degree Fahrenheit.

This conversion is purely multiplicative because both units reduce through one joules-per-kilogram-kelvin basis, and temperature intervals are handled as fixed scale relationships with no offset term.

Method & Reference

Method basis: exact conversion formula shown in Snapshot.
Applied factor: 1 BTU per pound-degree Fahrenheit = 4,186.8 Joules per kilogram-kelvin.
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

BTU per pound-degree Fahrenheit (BTU/(lb·°F))	Joules per kilogram-kelvin (J/(kg·K))
0.1	418.68
0.5	2,093.4
1	4,186.8
2	8,373.6
4	16,747.2
10	41,868
100	418,680
1,000	4,186,800

Frequently Asked Questions

What result does this BTU per pound-degree Fahrenheit to Joules per kilogram-kelvin page give for an input of 1?

For an input of 1 BTU per pound-degree Fahrenheit, this page gives 4,186.8 Joules per kilogram-kelvin.

Does this BTU per pound-degree Fahrenheit to Joules per kilogram-kelvin page use the fixed BTU, pound, and Fahrenheit-interval relationships?

Yes. BTU per pound-degree Fahrenheit routes use fixed energy, mass, and temperature-interval relationships through one joules-per-kilogram-kelvin normalization path, so US and SI thermal-property values stay aligned across the page.

When would I convert btu per pound-degree fahrenheit to joules per kilogram-kelvin?

This route is useful when comparing SI thermal property data with US engineering or HVAC references that report specific heat in BTU per pound per degree Fahrenheit.

How do I reverse BTU per pound-degree Fahrenheit to Joules per kilogram-kelvin?

Use the mirror Joules per kilogram-kelvin to BTU per pound-degree Fahrenheit route; it applies the inverse relationship with the same specific-heat-capacity assumptions.