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Calculate cutting speed, RPM, feed and pass time for milling, turning and drilling. Free, no registration needed.
Move a scale or type a value. Use the lock to keep it fixed while adjusting the others.
Values by material
Select a material to apply suggested starting values.
Linked scales
Adjust Vc, diameter, speed, feed and pass time live — on a milling cutter, lathe or drill — without Excel sheets. Ideal after obtaining the recommendation in the cutting parameters calculator.
Spindle speed is calculated with n = 1000 × Vc / (π × D). A 12 mm cutter at 120 m/min turns at about 3183 RPM. For turning, use the workpiece diameter; for drilling, the drill diameter. These are calculation examples, not recommended speeds for every material.
For milling, multiply feed per tooth × number of teeth × RPM. At 0.05 mm/tooth, 4 teeth and 3183 RPM, table feed is 636.6 mm/min. For turning and drilling, multiply feed per revolution by RPM. The CNC output uses S for spindle speed and F for feed; in turning, F is feed per revolution with G95.
Divide cutting distance by linear feed: tc = lf / vf. Travelling 100 mm at 636.6 mm/min takes about 0.157 minutes, or 9.4 seconds. Include cutting entry and exit distances. This time excludes tool changes, rapid moves and stops; it is not the total CNC cycle time.
It is a shop-floor calculator where Vc, diameter, RPM, feeds and pass time are linked: move any value and the rest recalculate instantly. It has three modes — milling, turning and drilling — with locks to pin whatever you don't want to change.
n = (1000 · Vc) / (π · D). If you know two of the three (cutting speed, diameter or spindle speed), the calculator finds the third. Units: Vc in m/min, D in mm, n in 1/min. Applies equally to a milling cutter, a turned part or a drill.
In milling: vf = fz · z · n (fz feed per tooth, z teeth). In turning and drilling: vf = f · n, with f in mm/rev. If you enter vf, fz (or f) is solved keeping the rest; with the lock you can pin whatever you don't want to change.
tc = lf / vf (minutes). lf is the cutting distance including lead-in and lead-out (when drilling, the depth). If you set a target time, the distance matching that feed is adjusted.
From the GetGCode materials catalog: you choose the material, the tool material (HSS or carbide) and the type of cut, and indicative Vc and feed are proposed. Always adjust for clamping, overhang and machine condition.
The chip flow rate Q (cm³/min) and the cutting power P = Q·kc/60000 with an indicative kc per ISO group. If you indicate the kW of your spindle, it warns you when the cut requires more power than you have.
The cutting parameters calculator recommends the starting point (Vc, feed, roughness, threading) by material and tool. This interactive calculator is for adjusting those quantities live at the machine: linked scales, locks, your machine's limits and pass time.
Yes. The calculation runs in the browser, without registration. The latest values for each mode are saved on the device, and you can share a link that opens the calculator already set to your values.
Cutting speed (Vc), rpm, feed and theoretical surface finish for turning, milling, drilling and threading by material and tool. A starting point.
Estimate CNC turning and milling cycle time from G-code. Calculate parts per hour with a breakdown of cutting, rapids, canned cycles and tool changes.
Works out ΔL with α corrected for the temperature you work at, corrects a reading to 20 °C using the part and the instrument you measured with, tells you how far to heat the bore or chill the shaft to fit, and how long to wait before measuring.
