Bench Math: CNC Calculator
Tap drill, feeds, cut lists
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Ten shop calculators that work with no signal. Tap drill sizes, speeds and feeds with chip thinning, bend allowance, and a cut list optimizer that accounts for your kerf.
Bench Math is the arithmetic of a working shop, on your phone, with no signal needed.
Ten tools built for machinists, metal fabricators and woodworkers. No account, no subscription, no internet.
FREE, COMPLETE, NO PURCHASE NEEDED
• Tap & Drill: the right drill for common UNC, UNF and ISO metric threads, at any thread engagement, chosen from the drill sets you actually own, plus clearance holes
• Board Feet: timber volume and cost, with the quarter sizes yards quote
• Right Triangle: solve from any two knowns, for miters, rise and run, bracing
BENCH MATH PRO, ONE PAYMENT
• Speeds & Feeds: RPM, feed rate and chip load for 16 materials, including the radial chip thinning correction that most charts leave out
• Cut List, linear: nest parts into bar and board stock, kerf accounted for
• Cut List, sheet: kerf-aware, grain-aware nesting for plywood and panels, with a cutting diagram
• Bend Allowance: flat patterns with K-factor, bend deduction, outside setback
• Bolt Circle: X and Y for every hole, ready for a DRO or a G-code file
• Belt & Pulley: belt length, ratio and the wrap angle that decides slip
• Gear Train: compound ratios, output speed and torque
• Saved projects, and PDF or CSV export to hand to whoever is at the saw
BUILT FOR THE SHOP
• Works fully offline. Nothing is uploaded, because there is no server
• Type fractions the way you write them: 3 1/2, 3-1/2, 7/8, or decimals
• Imperial or metric, following your region, and switchable any time
• Answers update as you type. No calculate button, no ads
• In English, French, Spanish, Japanese and Chinese
HONEST ABOUT WHAT IT IS
Speeds, feeds and K-factors are starting points, not specifications. They move with your tooling, your machine and your material. The screens that give those values say so, and tell you to try a test cut or a test bend first.
Bench Math Pro is a one-time purchase, not a subscription. Family Sharing is on.
Privacy Policy: https://benchmath-website.vercel.app/privacy
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Guillaume RATOUCHNIAK, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Guillaume RATOUCHNIAK
- Size
- 1.5 MB
- Category
- Utilities
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
English and 5 more
- English, French, Japanese, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Bench Math Pro $5.99
- Copyright
- © 2026 Guillaume Ratouchniak
