Construction Calculator
A full-featured construction calculator inspired by the Construction Master Pro. Feet-inches-fractions, area, volume, pitch/rise/run, stairs and circles
CONSTRUCTION
Master Pro Calculator
How to Use the Construction Calculator
Entering Feet, Inches & Fractions
Enter dimensions the way builders think: type the feet value, press Feet, then inches, then Inch. For fractions, enter the numerator, press /, then the denominator. Example: for 8 ft 6 ½ in, type 8 → Feet → 6 → Inch → 1/2.
Basic Arithmetic
Works like any calculator: enter a value, press an operator (+, −, ×, ÷), enter the second value, and press =. All arithmetic works in feet-inches, so adding 3 ft 6 in + 2 ft 9 in gives you 6 ft 3 in automatically.
Area & Volume
Switch to Area mode to calculate square footage. Enter Length, then press × and enter Width — the result is in square feet. For Volume, multiply all three dimensions (L × W × H) to get cubic feet or cubic yards.
Roof Pitch & Rise/Run
In Pitch mode, enter any two of pitch (as X/12), rise, or run, and the calculator solves for the third. Enter pitch as a number (e.g. 6 for a 6/12 pitch), rise or run in feet-inches. Press Solve to calculate.
Stair Calculator
Stair mode calculates the number of risers and optimal riser height. Enter the total rise (floor to floor) and your target riser height (typically 7–7¾ inches for building code compliance). The calculator gives you the number of risers and adjusted riser height.
Circle & Circumference
In Circle mode, enter a diameter or radius to instantly get circumference and area. Useful for calculating concrete for round columns, pipe sizing, or circular patio layouts.
Unit Conversions
Press the Conv button to convert the current display value between feet, inches, metres, centimetres, and yards. The conversion cycles through each unit with each press.
Memory Functions
M+ adds the current value to memory, MR recalls the stored value, and MC clears it. A small "M" indicator appears on the display when memory is in use.
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