Feet and Inches Calculator
Perform accurate arithmetic operations on feet and inches measurements. Perfect for construction, woodworking, and home improvement projects.
Missing Required Information
Please complete all required fields to calculate.
Examples:
- • Fractions: 1/4, 78/64, 5/8, 1/2, 5/16
- • Mixed numbers: 1+1/2, 5+3/8, 4+5/16, 1+4/32
- • All operations: Add, subtract, multiply, divide
How to Calculate Feet and Inches
The feet and inches calculator performs arithmetic operations on imperial measurements by converting everything to inches, performing the calculation, and then converting back to feet and inches with the proper fraction representation.
Addition & Subtraction
- 1. Convert both measurements to total inches
- 2. Add or subtract the inch values
- 3. Convert result back to feet and inches
- 4. Express remainder as proper fraction
Multiplication & Division
- 1. Convert measurement to total inches
- 2. Multiply or divide by the number
- 3. Convert result back to feet and inches
- 4. Round to nearest selected fraction
Construction Applications
Framing & Layout
Calculate stud spacing, joist placement, and beam lengths. Perfect for determining precise measurements when framing walls, floors, and roofs in residential and commercial construction.
Lumber & Materials
Calculate board lengths for trim work, siding, and custom millwork. Essential for determining cut lists and minimizing waste when working with expensive hardwood lumber.
Finish Carpentry
Precision measurements for crown molding, baseboards, and custom cabinetry. Critical for achieving tight joints and professional-quality finish work in high-end projects.
Common Construction Fractions
Standard Fractions
Measurement Tips
Always measure twice, cut once. Double-check your calculations before making any cuts.
Use the finest fraction that your measuring tools can accurately handle (typically 1/16").
Account for material thickness and saw blade kerf when calculating cut lengths.
Convert complex fractions to simplest form for easier reading on tape measures.
Frequently Asked Questions
Our calculator uses precise decimal conversion and rounding to provide accuracy within 1/64 of an inch. All calculations follow standard construction measurement practices and can be trusted for professional building projects.
Yes! You can enter measurements as whole numbers, decimals, or fractions. The calculator accepts mixed numbers like 5 feet 7½ inches and automatically converts everything for accurate calculations.
The calculator supports fractions down to 1/64 of an inch, which matches the precision of most construction measuring tools. You can set the output precision to display results in 1/2, 1/4, 1/8, 1/16, 1/32, or 1/64 increments.
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