HammerCalc is the metric imperial calculator contractors actually need — combine feet, inches, mm and meters in a single equation, then convert the answer with one tap.
When drawings mix imperial and metric, unit converters slow you down. HammerCalc lets you run mixed-unit math natively inside a full construction calculator — then convert the result to whatever unit the cut list needs.
A standalone unit converter can’t finish stair layouts or rafter math. HammerCalc is the best construction calculator when mixed units are just the start of the problem.
When you must do it by hand: 1 ft = 304.8 mm, 1 in = 25.4 mm, 1 m = 3.28084 ft. A dedicated metric imperial calculator keeps those factors inside the equation so you are not bouncing to a separate converter.
2.4 m + 8 ft 6 in = 2.4 m + 2.5908 m ≈ 4.9908 m (~16 ft 4-1/2 in)
Imported plan shows meters; the supplier list is in feet-inches:
Yes. Enter feet, inches, millimeters and meters together and convert the result with one tap.
No. Mixed-unit math and conversion are built into HammerCalc.
Enter each value with its unit in HammerCalc’s keypad. The app evaluates the mixed expression and lets you convert the result with one tap.
Usually not. A metric/imperial construction calculator that accepts mixed units replaces most standalone converter apps on site.
Stairs, square footage, feet & inches, metric & imperial — all in HammerCalc.
