Subfloor 4x8 Sheets

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.  

Room Floor Area Calculators

• 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.

Building Calculators

• Total Building Materials Calculator
• Total Pole Barn Materials Calculator

• 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

• Insulation Materials and Cost Estimate Calculator