Entropy Converter

Convert between entropy units including J/K, cal/K, BTU/R, and more.

Value

From

1 J/K =

0.239006

Calorie per Kelvin (cal/K)

1 J/K in all units

Joule per Kelvin (J/K)1

Kilojoule per Kelvin (kJ/K)0.001

Joule per Celsius (J/C)1

Calorie per Kelvin (cal/K)0.239006

Kilocalorie per Kelvin (kcal/K)0.000239

BTU per Rankine (BTU/R)0.000527

BTU per Fahrenheit (BTU/F)0.000527

Boltzmann constant (kB)7.242971e+22

1 cal/K

= 4.184 J/K

1 BTU/R

= 1,899.1 J/K

Boltzmann k

= 1.38e-23 J/K

1 kJ/K

= 1,000 J/K

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MyCalcBuddy Editorial Team

This page is maintained as an educational calculator reference.

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Formula Source: NIST Guide to SI Units

by National Institute of Standards

ðŸ”„Last reviewed: May 2026

âœ“Formula checks are based on standard references and internal QA review.