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`S = ( L * W )/(32 ft^2)`

Enter a value for all fields

The **Subfloor 4x8 Sheets** calculator computes the number of 4x8 sheets (e.g. plywood) required for a floor, sub-floor or deck. The area of the sub-floor is calculated to find the correct number of sub-floor sheets.

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

- (L) Length of Floor
- (W) Width of Floor

**Sub-flooring Sheets (S):** The calculator computes the area of the floor and the number of 4x8 sheets required to cover it.

- Area of Room's Floor - Area of Floor in Rectangular Room
- Area of Room's Floor with Angled Bump-out - Area of Floor in Rectangular Room with Angled Bump-out
- Area of Room's Floor with Squared Bump-out - Area of Floor in Rectangular Room with Squared Bump-out

Most rooms are simple rectangles with a length and a width. The only common departure are rooms with bump-outs. Some bump-outs are angular and taper down from an opening. Some bump-outs have squared corners. To compute the square feet of these floors are simple geometry based on the measurements of the main floor and the bump-out dimensions.

To compute the area of a floor with a different shape (e.g., circular, oval, or polygon), see the Area Calculator.

**Deck Builder Calculator** provides estimates for a simple rectangular deck project. Calculator functions include the following:

**Deck Board Count**: Computes the number of decking boards needed for your deck based on the size of the deck and the size of the decking boards.**Deck Boards Cost**: Computes the cost of deck board flooring based on a computed number of deck boards and the price per board.**Decking Cost Estimate**: Estimates the cost of wood board decking based on total area and unit pricing in dollars per square feet.**Subfloor 4x8 Sheets**: Computes the number of 4x8 sheets to cover floor/deck area.**Subfloor Cost**: Computes the cost of 4x8 sheets to cover fool/deck area.**Deck Joist Count**: Computes the number of floor joists needed for a deck. It returns the number of joists and plate boards, square feet of area and the length of the diagonal.**Joists on Beams**: Computes the number of joists (2x dimensional lumber or i-joists), number of beams, number of joist hangers, and length of plate boards needed for a floor or deck with a span that might require one or more beams.**Deck Joist Cost**: Computes the total cost of the floor joist boards.**Deck Stain and Sealer**: Computes the amount of stain and sealer needed for a deck.

- Area of a Roof
- Pitch of a Roof
- Number of Trusses Needed for a Roof
- 4x8s needed for a roof
- Shingles needed for a roof
- Number and Length of Metal Roof Panels
- Number and Length of Purlins
- Number and Length of Rafters
- Number and Length of Rafter and Collar ties

- Number and Length of wall top and bottom wall plates
- Number of Studs for a Room
- Number of Studs in a Wall
- Room Interior Area (wall and ceiling)
- Cubic Feet in a Room (volume)
- Number of 4x8 or 4x12 Sheets for a Room

- Number and Length of Floor Joists
- Number of Joist Hangers
- Compute the Cost of Floor Joists
- Compute iJoists for larger floors
- Compute the Number of 4x8 Sheets to cover the Deck or Floor
- Compute the number of Decking Boards to cover the deck or floor