Bench Calculator
Calculate the optimal dimensions and materials for building a bench based on your space and preferences.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Bench Calculator
- Enter Seat Dimensions (in inches):
- Seat Length (min 12 in, typical 36–72 in)
- Seat Depth (min 10 in, typical 15–20 in)
- Seat Height (min 14 in, standard 17–19 in)
- Select Material – choose from Cedar, Pine, Oak, or Teak.
- Click Calculate.
What You Get:
- Wood Volume in board feet (total lumber needed).
- Estimated Cost based on material price per board foot.
- Number of Slats (2.5″ wide with 0.25″ gaps).
- Leg Length (same as seat height, using 2×2 nominal lumber).
Note: All inputs are in inches. The calculator assumes a 1.5″ thick seat board and 1.5″×1.5″ legs.
Previous Results
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Frequently Asked Questions
You need the desired seat length, seat depth, and seat height in inches. You also select the wood material (cedar, pine, oak, or teak).
The volume is calculated as seat volume (length × depth × 1.5 in) plus leg volume (4 legs × leg height × 1.5×1.5 in cross-section), converted to board feet (divide by 144).
Cost varies by material. Using pine, a 48-inch bench might cost around $20-30, while teak could be $80-120. The calculator provides an estimate based on current average prices.