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Metric & imperial calculator for plans that mix units

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.

Try free for 7 days See all features

What this metric/imperial calculator does

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.

  • Feet, inches, millimeters and meters in one running equation
  • One-tap conversion to any supported unit
  • Ideal for imported plans, international suppliers and remodel work
  • Pairs with stairs, square footage, rafters and fraction tools

Stop converting. Start calculating.

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.

FAQ

Can HammerCalc mix metric and imperial units?

Yes. Enter feet, inches, millimeters and meters together and convert the result with one tap.

Do I need a separate unit converter app?

No. Mixed-unit math and conversion are built into HammerCalc.

Get this tool on your iPhone, iPad & Mac

Stairs, square footage, feet & inches, metric & imperial — all in HammerCalc.

Download on the App Store ← Back to home