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`Greenhouse_"vol" = (pi/4 * "W" * "H2" + "H1" * "W" )* "L" `

Enter a value for all fields

The **Greenhouse Volume (arched roof)** calculator computes the interior volume of a greenhouse based on simple measurements.

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

- (W) Width of the greenhouse (under the gable).
- (L) Length of the greenhouse (perpendicular to gable).
- (H
_{1}) Height of main area - (H
_{2}) Height of the gable

**Greenhouse Volume:** The volume (**V**) is returned in cubic feet. However this can be automatically converted to other volume units via the pull-down menu.

The volume calculation is a simple computation using the lateral area of the green house defined by the rectangle of (H_{1}*W) and half of a ellipse (.5 * π * W/2*H_{2}) all times the (L) the length. The default input units are feet, and the calculator returns cubic feet. However, vCalc lets the user can choose one of many length and volume units for automatic conversion from the pull-down list for both the input length units and the output volume units.

The volume of a greenhouse is useful in many ways. It is most often needed for calculating the heating and moisture (humidity) needs of the greenhouse.

**Greenhouse or High-tunnel Calculators**

- Volume of a Gabled Greenhouse: Enter the dimensions of a gabled building and compute the cubic feet volume.
- Volume of an Arched Roofed Greenhouse: Enter the dimensions of an arched roofed building (see diagram) and compute the cubic feet volume.
- Volume of a Quonset Hut Greenhouse: Enter the dimensions of the Quonset Hut and compute the cubic feet volume.
- Surface Area of a Gabled Greenhouse: Enter the dimensions of a normal gabled building and compute the square feet surface area.
- Surface Area of an Arched Roof Greenhouse: Enter the dimensions of an arched roof building and compute the square feet surface area.
- Surface Area of a Quonset Hut Greenhouse: Enter the dimensions of a Quonset Hut and compute the square feet surface area.
- Greenhouse Air Flow: Computes the air flow volume at the fan, middle and end of the greenhouse and the Evaporative Cooling Efficiency
- Conductive Heat Loss: Enter the surface area, the heat loss coefficient for the surface material and the maximum heat range, and the calculator will compute the BTUs per hour needed to heat the inside.