# CNC Machinist Calculator Pro

> Productivity

Canonical page: [https://chrome-stats.com/d/id1037668281](https://chrome-stats.com/d/id1037668281)

## Overview

- **ID:** `id1037668281`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Shane Anderson
- **Category:** Productivity
- **Rating:** 4.70 / 5 (677 ratings)
- **Version:** 19
- **Last updated:** 2024-10-05
- **First published:** 2015-09-25
- **Size:** 47 MB
- **Data as of:** 2026-09-18
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/cnc-machinist-calculator-pro/id1037668281)
- **Website:** [http://www.cncdirt.com](http://www.cncdirt.com/)
- **Privacy policy:** [http://cncdirt.com/privacypolicy/](http://cncdirt.com/privacypolicy/)

## Description

CNC Machinist Calculator Pro is a comprehensive machining calculator designed for manufacturing engineers, machinists, CNC operators, tool & die makers, and hobbyists. It delivers fast turning, milling, drilling, and threading calculations, true position, GD&T, bolt patterns, and material data to support on-the-fly decision making and quoting.

From SFM and cycle-time calculations to G-code and M-code export, the app bundles dozens of tools—circle milling, thread data (NPT, Acme, STI), tool wear insights, center drill data, weight calculations for 170+ materials, and a machinist forum—built to boost productivity and tool life.

## Rankings

- #64,255 — Overall

## Review summary

Users praise CNC Machinist Calculator Pro as a comprehensive, on-the-go reference with thread data, speeds/feeds, drill charts, and other calculators. It’s widely appreciated for putting critical data at your fingertips and serving both learners and seasoned machinists. However, some users report navigation frictions requiring multiple menu hops to locate data, and point to calculator accuracy issues (math results and bolt-hole calculations) that can require double-checking. The app remains a strong pocket reference for shop-floor work, though some want continued updates and feature enhancements.

### Pros

- All-in-one machinist reference with extensive data and calculators (speeds/feeds, thread data, drill charts, etc)
- Thread data and reference is particularly valuable, giving data at your fingertips
- Portable, pocket-sized tool that you can pull out at the machine for quick info
- Great for both beginners and experienced machinists; helps with learning and on-the-job programming/fixture design
- Easy-to-use interface and quick access to essential data

### Cons

- Navigation/search to find specific data is clunky; you often have to drill through multiple menus, especially to access thread/tap data
- Calculator/data accuracy issues (math results not following standard rules, and some calculations like bolt holes are incorrect)

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Source: [Chrome-Stats](https://chrome-stats.com/d/id1037668281)