Deck Calculator
Plan deck boards and framing quantities from deck area and dimensions.
Step 1: Units
Step 2
Enter project measurements
Use decimals if needed (e.g. 3.5).
Step 3
How to use this calculator
Provide deck length, width, and selected spacing assumptions.
What the math is doing
Linear feet ≈ (sq ft ÷ board width in feet) × (1+waste).
Frequently asked questions
Hidden fasteners?
Gap spacing may change effective coverage.
Diagonal pattern?
Increase waste percentage.
Picture framing?
Add border boards separately.
Joists and beams?
Use span tables; not included here.