Carpenter Calculators

Practical woodworking and measurement tools

Measure, estimate and plan materials

Use these tools for carpentry, furniture projects, cabinets, shelves and general woodworking. Convert feet and inches, estimate board feet and lumber cost, and check cut-list totals before purchasing material.

For accurate estimates, measure each piece carefully and keep units consistent. A calculator can help with quantity planning, but actual material requirements may change because of saw kerf, defects, grain direction, joinery, trimming and project design.

Feet & Inches Calculator

Convert feet and inches to decimal feet and total length.

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Carpenter Area / Square Feet

Calculate area from length × width, including multiple pieces.

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Board Foot Calculator

Calculate lumber volume in board feet.

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Wood / Lumber Cost

Estimate total lumber cost from size, quantity and price.

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Cut List Calculator

Total cut length and estimated waste from a simple cut list.

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Room Area & Material

Estimate room area and material requirements.

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Staircase Calculator

Estimate stair rise, run and basic stair dimensions.

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Related construction tools

For flooring and room projects, use the Tile Calculator, Paint Calculator and Concrete Calculator. Read the Square Feet & Area Guide for area formulas, or browse Construction Calculators for building estimates.

How to use these carpenter calculators

Start with the measurement you know, then choose the matching tool: use feet-and-inches for mixed measurements, square feet for panel or floor area, and board feet for lumber volume. Enter dimensions in the units shown on each field and keep a written cut list before buying stock.

Worked example: board feet

For a board 1 inch thick, 6 inches wide and 8 feet long, board feet = thickness × width × length ÷ 12 = 1 × 6 × 8 ÷ 12 = 4 board feet. Multiply by the supplier's price per board foot for a basic material estimate; confirm actual dimensions and local pricing before purchase.

Cut-list limits

The cut-list tool totals requested lengths and estimates stock-length equivalents. It does not optimize a cutting pattern, account for saw kerf, grain direction, defects or every offcut. Add those factors when planning real woodworking jobs.

For interactive calculations, open the Carpenter Calculator tool. For tile, paint and concrete quantities, see the Construction Calculators.

Important: These are estimating tools. Confirm structural, stair and construction dimensions with drawings, applicable standards and qualified professional guidance where required.
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