BuildX tools
Feet & inches
calculator.
Add or subtract measurements in feet, inches, and fractions. The result stays exact—useful for layout, materials, and everyday field math.
Your measurements
Exact result
149 total inches.
How it works
Keep the fractions in the answer.
Construction measurements are often written in feet, inches, and sixteenths. This calculator converts both measurements to sixteenths of an inch, performs the calculation, then converts the exact result back into a format you can use.
Made for the field
Exact construction math, ready when the job needs it.
BuildX keeps a full construction calculator, layout tools, and material estimates within reach on iPhone—without making you translate the notation you already use.