CNC Cycle Time Calculator

What is CNC cycle time? CNC cycle time is the total machine time required to complete one part, including cutting and relevant non-cutting machine movements.

How do I calculate CNC cutting time? Divide total cutting distance by feed rate. Make sure both values use compatible units, such as mm and mm/min.

Does rapid movement count toward cycle time? Yes. Rapid movements take machine time even though the tool is not cutting material.

Do tool changes count toward cycle time? Yes. Tool-change time is part of the machine cycle when tool changes occur during the part program.

What is dwell time? Dwell is a programmed pause in the CNC cycle, often used for machining or process requirements. It contributes directly to cycle time.

Can I calculate total time for a batch? Yes. Enter the production quantity and the calculator multiplies the cycle time per part by the number of parts.

Does feed rate determine the entire CNC cycle time? No. Feed rate determines the estimated cutting time for the entered cutting distance. Rapid movements, tool changes, dwell and other operations also contribute.

Why can actual machine cycle time differ from the calculation? The controller may slow down or modify programmed movements because of acceleration limits, cornering, look-ahead, machine dynamics and other control behavior.

Can this calculator be used for milling? Yes. Enter the combined cutting distance and feed rate for the milling operations, then add non-cutting machine times.

Can this calculator be used for CNC turning? Yes. Enter the total effective cutting distance and corresponding feed rate for the turning operations, along with tool changes and other machine time.

Should setup time be included in cycle time? Normally no. Setup is generally treated separately from per-part cycle time, especially when estimating production cost for a batch.