formula.expertYour record
BTU/∘R\text{BTU/}^{\circ}\text{R}

BTU per Rankine degree

Heat capacityexact by definition

The BTU per Rankine degree is exactly 1899.100535 J/K, identical in size to BTU/°F. One US gallon of water is about 8.34 BTU/°R, which is the origin of the 500 factor in the US hydronic heat equation.

1 BTU/∘R\text{BTU/}^{\circ}\text{R} 1,899.1005 J/K\text{J/K}
Where the unit came from

The familiar Q = 500 × gpm × ΔT for water comes straight from this unit: 8.34 lb per gallon times 1 BTU/(lb·°F) times 60 minutes per hour is 500.4, rounded to 500 and printed in every North American hydronic manual.

One btu per rankine degree in every heat capacity unit

1,899,100millijoule per kelvin (mJ/K)
1,899.1joule per kelvin (J/K)
1,899.1joule per Celsius degree (J/°C)
453.896calorie per kelvin (cal/K)
1.8991kilojoule per kelvin (kJ/K)
1.8991kilojoule per Celsius degree (kJ/°C)
1BTU per Fahrenheit degree (BTU/°F)
1BTU per Rankine degree (BTU/°R)this unit
0.527528watt-hour per kelvin (W·h/K)
0.453896kilocalorie per kelvin (kcal/K)
0.0018991megajoule per kelvin (MJ/K)
0.000527528kilowatt-hour per kelvin (kW·h/K)
Solvers that use heat capacity

← Every unit on formula.expert

Cite this page

formula.expert. (n.d.). BTU per Rankine degree (BTU/°R): definition & conversion. https://formula.expert/units/btu-per-rankine-degree