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`BTUs"/"hr = DeltaT * "W" * "L" * "H" * c`

Enter a value for all fields

The **BTUs per hour to Heat a Room** calculator computes the energy (heat) required to heat a space of a certain volume by a specified temperature variance..

**INSTRUCTIONS:** Choose units and enter the following:

**(L)**Length of Room**(W)**Width of Room**(H)**Height of Room**(ΔT)**Change in Temperature- (
**c**) Heat Transfer Coefficient in BTUs per cubic foot

**BTUs per Hour (BpH): ** The calculator returns the energy rate in BTUs per hour. However, this can be automatically converted into other volume units (e.g. cubic yards or meters) via the pull-down menu.

The formula to compute the energy to heat a room is:

BpH = L * W * H * ΔT * c

where:

- BpH = BTUs per hour to support the temperature variance in a room volume
- L = Length of Room
- W = Width of Room
- H = Height of Room
- ΔT = Temperature Variance
- c = Heat Transfer Coefficient
- c = constant (BTUs per hour, per cubic foot per degree Fahrenheit.
*Top to Bottom Materials*

This formula is base on the simple formula mentioned in the Ferrell Gas article on How many BTUs you need to heat your home, shop, garage, and more!.

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- Surface area of the interior walls and ceiling of a room.
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- Insulation for a Room
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- Number of drywall sheets needed for a room
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- Cost of studs needed to frame a room

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