Feedrate: CNC Speeds & Feeds
Machinist Calculator & Tools
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Radial chip thinning and slot de-rate built in the two corrections cheap calculators skip, and the two that break cutters. One payment, no subscription.
Feedrate gives you speeds and feeds you can actually run, for milling, drilling and
turning across 18 material groups.
REQUIRES A ONE-TIME PURCHASE
Feedrate is a paid tool. A single $8.99 purchase unlocks the whole app — no
subscription, nothing recurring, nothing to cancel. Buy it once, keep it.
BUILT FOR THE REAL CUT
Most calculators hand you a textbook number and stop. Feedrate applies the two
corrections that decide whether a cutter survives:
- Radial chip thinning. Below 50% radial engagement the chip comes out thinner than
your programmed feed, so the tool rubs instead of cutting. Feedrate raises the feed
to compensate, and shows you the factor it used.
- Slot de-rate. Buried in a full-width slot, chip evacuation and deflection are the
limit, not the formula. Feedrate backs the numbers off instead of pretending
otherwise.
YOUR MACHINES, NOT A GENERIC ONE
Save every machine you run with its real spindle speed, feed and power limits.
Results are clamped inside those limits, so you never get a number your mill cannot
reach. Starter profiles for a VMC, a benchtop mill and a router are included.
THE FULL SHOP REFERENCE
- Tap drill sizes at any thread engagement percentage, imperial and metric
- Clearance holes, close through loose
- Bolt circle coordinates
- Right-triangle solutions
- Sine bar stacks
WHAT YOU GET BACK
Spindle RPM, feed rate, feed per tooth or per rev, material removal rate, spindle
power and torque. Turning adds an estimated surface finish. Every result carries the
surface speed it assumed, so you can check the tool's datasheet against it.
INCH AND METRIC
Switch at any time. The engine computes in metric and converts at the boundary, so
nothing drifts when you change systems mid-job.
WORKS WITHOUT SIGNAL
No account, no cloud, no tracking. Everything runs on the device, which matters in a
shop with no reception.
A NOTE ON THE NUMBERS
Cutting data is a conservative starting point, not gospel. Values vary by tool brand,
coating, coolant and rigidity. Your specific tool's datasheet always wins. Feedrate
gives you a defensible place to start and shows its reasoning.
TERMS AND PRIVACY
Terms of Service: https://feedrate-web.vercel.app/terms
Privacy Policy: https://feedrate-web.vercel.app/privacy
Questions or a number that looks wrong: octacoach143@gmail.com
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Andrej Sazdovski, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Andrej Sazdovski
- Size
- 53.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Feedrate — Full Unlock $8.99
- Copyright
- © 2026 Andrej Sazdovski