ChipLoad: The Free Machinist Calculator App with 17 Tools for the Shop Floor

Every machinist has done the walk: stop at the machine, trudge back to the office computer or the dog-eared handbook, look up a feed, a drill size, a thread pitch — then walk back and hope you remembered it right. We built the fix. ChipLoad Machinist Calculator puts 17 shop calculators in your pocket, built by a working machinist to be used standing at the machine: big targets, plain numbers, and no subscription.

It's free to download on the App Store for iPhone — and it works fully offline, so it runs fine in the dead zones every shop has.

Download ChipLoad FREE on the App Store

Speeds & feeds without the handbook

The Mill Speeds & Feeds tool gives you RPM, feed rate, chip load per tooth, material removal rate, horsepower and torque in one pass — with operation, coating, coolant, rigidity and interrupted-cut factors applied the way you'd apply them yourself, plus a cut-intensity slider tuned to your machine and depth/width suggestions per cutter. Lathe work is covered too: G96/G97, insert shapes with depth-of-cut guidance, and a stock-diameter RPM bracket so you don't overspeed a big bar at startup.

The everyday lookups, all in one place

• Drill & Tap — drill point and countersink math, plus full cut tap, form tap, close fit and free fit charts
• Thread Lookup — UN, metric and Acme, with 3-wire measurement and fastener torque/clamp load
• Bolt Circle, True Position, Sine Bar and right-triangle trig
• Ball Nose finish stepover for contour work
• Material Weight — six shapes, including square tube and angle, with material rates and a total price for the piece

Job costing the way shops actually quote

The Job Cost tool is the one shop owners will open daily: marked-up material, setup spread across the run, scrap allowance, and profit figured as a true margin — not a markup pretending to be one. Pair it with the Material Weight tool and you can quote a job from the parking lot.

Free vs. Pro

A new install gets every tool for a 5-minute trial. After that, the free version keeps the calculator and the basics of Mill and Lathe. ChipLoad Pro is a single one-time purchase that unlocks everything forever — no subscription, no ads, no account. Your machines save as profiles, your setups save on the phone, and every number is a starting point from the same handbook math — verify before you cut.

ChipLoad was built by Kyle Davison here at Burton Tool. If you run a machine, grab it free and tell us what to add next.

Get ChipLoad FREE on the App Store

More on our Apps page.