Speed and feed calculator

    Work out spindle speed, feed rate and chip load from your material, tool and machine limits — then keep every input while you switch to the next calculation.

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    Calculators

    Speeds & Feeds CalculatorSpeed and feed calculator for every tool type (mills, drills, reamers, taps, thread mills, turning): RPM from SFM, feed rate, chip load, 280+ materials, chip thinning, HSM, your own SFM and chip load, machine limits and partner data.Milling CalculationsMilling speed, feed, chip thinning and HFM geometry.Turning CalculationsLathe RPM, feed per revolution and material removal rate.Material Removal RateVolumetric MRR for milling and turning operations.

    Speeds and feeds by material

    224 of 224 materials

    PSteel76
    MStainless steel42
    KCast iron14
    NNon-ferrous & plastics61
    SSuperalloys & titanium31
    HHardened steel0

      Drilling and tapping speeds by size

      What it covers

      • RPM = (SFM × 12) ÷ (π × D) — capped by your machine's spindle limit
      • Feed rate = RPM × chip load × effective teeth
      • Material library with hardness-aware starting values
      • Optional chip thinning and high-feed milling geometry

      Common questions

      How do I calculate RPM from SFM?
      Multiply surface feet per minute by 12, then divide by π times the cutter diameter in inches. Metric: Vc × 1000 ÷ (π × D in mm).
      Are these values guaranteed?
      No. They are starting points. Your tool supplier's data and your machine's limits always come first.

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