
Bench Math: CNC Calculator
Tap drill, feeds, cut lists
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About
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/
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What's New in Bench Math
1.0
September 29, 2026
1
Subscriptions & In-App Purchases
$5.99
Bench Math Pro
Every tool unlocked. One payment, for good.





