Column Form Calculator
Calculate column form plywood area, clamp spacing, and concrete volume.
Inputs
Results
Max pressure at base (psf)
1,800
Max pressure (psi)12.5
Plywood contact area (sf)96
4×8 plywood sheets3
Concrete volume (cy)1.78
Min clamp spacing (in)13
Total clamps needed13
How to Use This Calculator
- Enter the Column Width, Column Depth in inches, and Column Height in feet.
- Enter the Concrete Unit Weight (typically 145–150 pcf) and Clamp Safe Working Load.
- Review Max Lateral Pressure at Base in psf — this governs clamp spacing design.
- Check Minimum Clamp Spacing at the base and Total Clamps needed for the full column height.
- Use Concrete Volume in cubic yards to coordinate pour scheduling and truck ordering.
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