Machining & Workshop calculators
Lathe, threading, milling and drilling calculations for the workshop.
CNC Machining Cycle Time EstimatorCycle time and parts per hour from cutting moves, rapids, tool changes and handling.Machining & WorkshopCutting Speed & Spindle RPM CalculatorSpindle speed from cutting speed and diameter — or cutting speed from RPM.Machining & WorkshopLathe Change-Gear Calculator for Thread CuttingFind or check change gears for cutting a metric or TPI thread on your lathe.Machining & WorkshopLathe Turning Time CalculatorMachining time for a turning operation from length, feed and RPM or cutting speed.Machining & WorkshopMachining Cost & Tool Cost per Part CalculatorCost per part from machine rate, cutting and handling time, tool life and tool cost per edge.Machining & WorkshopSingle-Point Thread Depth CalculatorThread depth, compound-slide infeed and an equal-area pass schedule for 60° threads.Machining & WorkshopTap Drill Size CalculatorTap drill diameter for ISO metric and UNC/UNF threads at your chosen % of thread.Machining & WorkshopTaper Turning CalculatorTaper angle, compound setting, taper per foot and tailstock offset for turning tapers.Machining & WorkshopTaylor Tool Life CalculatorTool life from cutting speed with V·Tⁿ = C, the speed for a target life, or n and C from two tests.Machining & WorkshopThread Pitch, TPI & Lead CalculatorConvert pitch in mm to TPI and back, and find the lead of multi-start threads.Machining & WorkshopTurning Material Removal Rate CalculatorMetal removal rate (cm³/min) of a turning cut from diameter, depth of cut, feed and speed.Machining & Workshop