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Construction Math Calculator
Add feet, inches, and fractions together for fast on-site construction math.
This scientific calculator is optimized for electricians and tradespeople. Use the DECIMAL / FRACTION toggle to switch between standard decimal inputs and fractional feet/inch inputs (e.g., 5' 3-1/2"). It also supports standard trig functions and power calculations needed for conduit bending and load calculations.
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Construction Math
This tool handles fractional arithmetic (e.g., 1' 3-1/2" + 5") directly. It converts decimal feet to feet-inches-fractions, essential for layout and pipe fitting.
Precision in Trades
Accurate measurement and calculation are critical for code compliance. NEC 110.12 requires electrical equipment to be installed in a neat and workmanlike manner.
Frequently Asked Questions
How do I convert decimal feet to inches?
Multiply the decimal part by 12. For example, in 5.75 feet: 0.75 × 12 = 9 inches. Total is 5' 9".
Can this calculate pipe offsets?
Yes, use the trig functions to calculate offsets if you know the angle (e.g., Offset × Cosecant = Travel).
What is the "Tape Measure" mode?
Tape Measure mode rounds calculation results to the nearest practical fraction (like 1/16" or 1/8") rather than showing a long decimal string.