Free for every machinist
CNC calculators and shop references
Speeds and feeds, drill and tap, thread sizes and everyday shop math — all in one workspace that keeps your numbers while you switch tools.
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Machining
Speed & Feed CalculatorRPM, feed rate, and chip load from SFM and cutter geometry.Milling CalculationsMilling speed, feed, chip thinning and HFM geometry.Turning CalculationsLathe RPM, feed per revolution and material removal rate.Drilling CalculationsDrilling RPM, feed per revolution, point allowance and cutting time.Lathe ThreadingSingle-point threading pitch, multi-start lead and synchronized feed.Material Removal RateVolumetric MRR for milling and turning operations.Cycle Time EstimatorEstimate total cycle time from cutting parameters.
Measurement
Math CalculatorGeneral-purpose calculator with order of operations, functions, and history.Tolerance CalculatorMin/max dimensions, bilateral tolerance stackup, and pass/fail.Surface Finish CalculatorTheoretical Ra from feed rate and tool nose radius.Right Triangle SolverSolve any right triangle from two known values.