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RPM From SFM And Diameter Calculator
Find spindle RPM from surface speed and tool diameter.
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RPM
Compare Your Options And Get Clear Answers
Find spindle RPM from surface speed and tool diameter.
RPM From SFM And Diameter Estimator
Enter your numbers below for an instant estimate.
0
๐ก Tip: RPM = SFM x 3.82 / D.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
RPM Quick Guide
Typical values for reference.
| SFM | Diameter | RPM | Notes |
|---|---|---|---|
| 100 | 0.5 | 764 | Steel |
| 300 | 0.5 | 2292 | Default |
| 300 | 1 | 1146 | Larger |
| 600 | 0.25 | 9167 | Small |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
RPM From SFM Calculator FAQ
Answers to common questions about this calculator.
Surface feet per minute.
It gives a quick estimate of rpm from sfm and diameter from the values you enter.
No. It is a planning estimate, so check important figures with a professional or official source.
Yes. Edit any field and the result updates when you calculate.