# Tap And Drill Chart Calculator

> Calculate charts for various thread percentages for SAE and Metric screws

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

## Overview

- **ID:** `com.principiaprogramatica.tapanddrillcalculator`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Greg A Miller
- **Category:** TOOLS
- **Downloads:** 367,758
- **Rating:** 4.45 / 5 (539 ratings)
- **Version:** 4.2.3
- **Last updated:** 2025-06-30
- **First published:** 2016-07-24
- **Publisher country:** US
- **Size:** 1.82 MB
- **Data as of:** 2026-09-14
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.principiaprogramatica.tapanddrillcalculator)
- **Website:** [http://www.principiaprogramatica.com](http://www.principiaprogramatica.com/)
- **Privacy policy:** [http://www.principiaprogramatica.com/privacy.html](http://www.principiaprogramatica.com/privacy.html)

## Description

"Tap And Drill Chart Calculator" is an Android app designed to calculate thread percentages for various standard SAE and Metric screws. It provides users with essential information, including hex nut sizes and visual aids to verify TPI/TPMM and screw diameters. This user-friendly app requires no permissions and aims to assist DIY enthusiasts and professionals alike in their projects. Support free development by rating the app after use, and enjoy an invaluable tool for your threading needs.

## Rankings

- #117,310 — Overall

## Review summary

Reviews praise the app for accuracy, clarity, and ad-free usefulness, with strong metric/SAE support and thread-engagement guidance. The main recurring drawbacks are gaps in size coverage (notably M14x1.25 and #14-20), missing data compared to older chart apps, and requests for broader thread standards and features.

### Pros

- Accurate and high-quality information.
- Clear, fast, and easy to use with a clean layout.
- Ad-free experience with no fluff, focused data.
- Comprehensive tap/drill data with metric/SAE options and adjustable thread engagement, showing hole sizes and recommended drill bits.

### Cons

- Missing tap sizes (e.g., M14x1.25 and #14-20) and generally incomplete size coverage.
- Missing information compared to older drill-bit charts apps.
- Requests for more sizes and standards (NPT, BSP, PSPP) and additional features.

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