SHOP-FLOOR CALCULATORS

Less calculating. More cutting.

Fast, transparent CNC formulas for milling, drilling, tapping and lathe work—built for practical use.

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LATHE · MILL · DRILLRPMFEEDIMPERIAL + METRIC
FREE MACHINIST TOOL

Milling calculator

SPINDLE1,528RPM
FEED RATE12.22IPM
FEED / REV0.0080in/rev

Educational starting point only. Verify against the cutting-tool manufacturer’s data and prove out safely.

CNC calculations you can understand

CNC TrueCut provides practical starting-point calculators and plain-language machining guides for mills, lathes, drills and taps. Every formula shows the inputs that matter, so machinists can check the result instead of trusting a mystery number.

Built for careful prove-out

Calculated values are educational starting points. Confirm them against your insert or cutting-tool manufacturer’s data, your machine limits, workholding, tool condition and shop procedures before cutting.

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Clear formulas. Editable inputs. No mystery numbers.

Always pair calculated values with your toolmaker’s recommendations, machine condition and safe prove-out.