Machining · feeds speeds
Machining Time Calculator
Estimate cutting-feed time and a transparent cycle total from manual path, feed, rapid and fixed-time inputs.
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Estimate machining time
Build a transparent time estimate from manual path, rate and delay inputs.
Example path and feed values are preloaded to demonstrate the arithmetic. Replace them with program- or measurement-derived values.
0.0333 hours
Cutting
2 min
Rapid
0 min
Tool changes
0 min
Show calculation steps
| Step | Expression | Raw value |
|---|---|---|
| Cutting-feed time | path × passes ÷ feed | 2 min |
| Rapid time | rapid distance ÷ rapid rate | 0 min |
| Estimated total | cut + rapid + tool changes + fixed time | 2 min |
How to estimate machining time
Enter cutting path per pass, programmed cutting feed and the number of passes. Optionally add total rapid distance and rate, tool-change count and time, and other fixed minutes. Every added term remains visible in the result.
cutting minutes = path per pass × passes ÷ cutting feed
rapid minutes = rapid distance ÷ rapid rate
estimated total = cutting + rapid + tool-change + fixed minutes
Worked example
A 1,000 mm path at 500 mm/min takes 2 minutes for one pass. Two passes take 4 minutes. Adding 600 mm of rapid at 3,000 mm/min, three 0.5-minute tool changes and 4 fixed minutes gives 4 + 0.2 + 1.5 + 4 = 9.7 minutes.
What is excluded
The simple model assumes entered rates are maintained. Actual machines accelerate and decelerate, blend corners, apply look-ahead, dwell, probe, change modes and wait for operators or automation. This edition does not parse G-code or CAM files and does not model machine dynamics. Use observed production data for quoting or capacity commitments.
Common mistakes
- Entering straight-line part dimensions instead of the complete toolpath length.
- Forgetting the number of passes.
- Treating rapid nameplate rate as achieved average motion.
- Omitting approach/retract, probing, spindle, coolant and handling delays.
- Presenting calculated cutting-feed time as total cycle time.
FAQ
Can I upload G-code?
No. This safe edition uses manual values and performs no parser or machine simulation.
Why is actual time longer on short moves?
Acceleration, deceleration, direction changes and controller behavior prevent the commanded rate from being maintained for the entire move.
Can I use this for production quoting?
Use it as a transparent early estimate and calibrate with observed machine/process data before making commitments.
References and further reading
These sources define or explain the calculation. Source editions and model limits are part of the result—not decorative citations.
- Formulas and definitions for milling — metric, Sandvik Coromant; accessed 2026-08-22. CHIP-C01
- Mill Speeds and Feeds Formulas — Inch, Haas Automation; accessed 2026-08-22. CHIP-C02
- NIST Guide to the SI, National Institute of Standards and Technology; accessed 2026-08-22. CHIP-C04