# Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions

> Reference

Canonical page: [https://chrome-stats.com/d/id418091864](https://chrome-stats.com/d/id418091864)

## Overview

- **ID:** `id418091864`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Chewy Applications
- **Category:** Reference
- **Rating:** 4.50 / 5 (22 ratings)
- **Version:** 2.0
- **Last updated:** 2015-09-24
- **First published:** 2011-02-09
- **Size:** 1.92 MB
- **Data as of:** 2026-09-24
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/drill-size-charts-drill-bit-size-tables-to-show-us/id418091864)
- **Website:** [http://chewyapplications.com/](http://chewyapplications.com/)

## Description

An easy-to-use set of charts for viewing various drill bit size types and their decimal inch and metric size equivalents and conversions. No typing required, just tap the required size type, and scroll through the chart to find your drill size. 

Tables include common drill bit size types: 
• US Number and Letter Gauge Sizes
• Fractional-Inch Sizes
• Metric Sizes
• A table with all types combined, for easy comparison of sizes

A helpful reference tool for anyone dealing with drills of various types: engineers, trades-men, students, tool makers, fitters and turners, fabricators, etc. 

Other Features:

• Search • 
Scroll up within any drill  table to reveal the search bar. 

• All Device Orientations Supported • 
The app can be used in both landscape and portrait orientations, as well as upside-down. 

• Universal App • 
This app is universal; meaning you only need to buy it once to be able to install it on all your iOS devices (iPhone, iPod Touch, and iPad)

If you have suggestions, requests, or need support, feel free to contact us through the app, or by emailing support@chewyapplications.com.

## Rankings

- #241,922 — Overall
- #61 — size

## Review summary

Reviewers praise the app as a quick, easy-to-use drilling-size reference that saves time and reduces reliance on printed charts. It supports multiple units (English, Metric, Fractional, Decimal) and offers convenient displays, including an All sizes list. Many find it handy in the field and worth the price. A common improvement is adding a drill/tap size reference (tap drill sizes). A few reports note reliability issues opening the app on some devices, indicating a need for fixes.

### Pros

- Handy quick reference that's easy to use and saves time
- Simple, straightforward UI and easy to reference
- Supports English, Metric, fractional, and decimal sizes
- All sizes display/list helps locate the nearest drill size
- Worth the price / good value

### Cons

- Missing drill/tap size reference; user requests a drill/tap size chart (tap drill sizes) as a feature

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Source: [Chrome-Stats](https://chrome-stats.com/d/id418091864)