Floor Joist Span Calculator

    Floor Joist Span Calculator

    Determine the maximum allowable span based on joist size and spacing.

    * Values are in feet.

    Step 1: Enter Joist Details

    Select the nominal joist size.

    Select the spacing between joists.

    The values are based on a simplified span table:
    For 16″ O.C. – 2×6: 9.0 ft, 2×8: 12.0 ft, 2×10: 15.0 ft, 2×12: 18.0 ft.
    Spacing adjustments available for 12″ and 24″ O.C.

     
    Angle and Pitch Calculator
    Previous
    Project Timeline Calculator
    Next