Deck Calculator
Divides deck surface area by board width to estimate how many linear feet of decking you must buy before accounting for gaps.
Step 1: Units
Step 2
Enter project measurements
Use decimals if needed (e.g. 3.5).
Step 3
How to use this calculator
Enter deck area and the actual decking face width (common 5.5 in for a nominal 6 in board).
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.