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

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

by Chewy Applications

21 ratings
20 reviews
#176 in paid Reference
🔧 Utilities
🔍 Reference
$0.99

Details

  • Released
  • Updated
  • February 9, 2011
  • September 24, 2015

Features

Developer

Chewy Applications
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Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions screenshot #1 for iPhone
Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions screenshot #2 for iPhone
Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions screenshot #3 for iPhone
Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions screenshot #4 for iPhone
iphone
ipad
📉no. 176
Charts↘︎
⭐20
Reviews↘︎
📝6+ tags
Tags↘︎
🔄4+ apps
Alternatives↘︎
❓8 answered
FAQ↘︎
📦w/o updates
Updates frequency↘︎
🖼️Get Icon
Icons↘︎

About

Access comprehensive drill bit size charts with ease. Quickly find conversions between US Number/Letter, Fractional-Inch, and Metric sizes. A handy reference for professionals and students alike.

✓Drill bit size charts
✓US Number/Letter gauge sizes
✓Fractional-Inch sizes
✓Metric sizes
✓Combined size table
✓Search functionality
✓All device orientations supported
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What's New in Drill Size Charts

2.0

September 24, 2015

This update from Apple will improve the functionality of this app. No new features are included. • Updated for iOS 9 - our apologies for those users who couldn't use the app on iOS 9 until now. • Added Fractional Inch sizes up to 7 inches. • Added Metric sizes up to 180mm. • Added a table to show Fractional Inch sizes reduced down to X/64 and X/32. • UI updated for iPhone 5, iPhone 6, and iPhone 6 Plus. • Search function: since the tables are longer now, we added a search bar at the top of all tables (scroll up to access it). • Universal app - download it on your iPhone & iPad • New home screen layout and info section in Settings.

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Charts

Top Paid

📉 176-17

Reference

This app dropped -17 positions in Reference chart.

Last updated on July 26, 2026.

User reviews

Most RecentHighest RatedLowest Rated

Can’t open

This is probably one of the best apps when it was working but I haven’t been able to open it with any phone or computer. Please fix this app.
shasta homeshasta home

Drill chart

Awesome app very quick to reference
AkjeepkillerAkjeepkiller

Such a handy tool to have on my iPhone

Being an aircraft engineer I very often refer to this program to find clearance drills and various conversion sizes of drills to use in my daily job, weather it be on Boeing or Airbus (imperial/metric) components/parts. If I haven't got my trusty "Zeus Book" at hand this app has come to my rescue on more than one occasion. I only wish they did an iPad version rather than having to upscale the iPhone version but as they say "Beggars can't be choosers". I would recommend this app to one and all in the engineering game as it is a most handy tool 👍
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Big-DBBig-DB

Chewy and delicious

Seriously, if you ever drill holes this reference will come in handy.
Dent De LeonDent De Leon

Does what I want.

Very convenient. This is exactly what I was looking for to add to my other conversion Apps. English, Metric, Fractional & Decimal.
CG03026CG03026
See 15 more reviews

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FAQ

What drill bit sizes does Drill Size Charts show?

Drill Size Charts displays US Number and Letter Gauge Sizes, Fractional-Inch Sizes, and Metric Sizes. It also includes a combined table for easy comparison across all types.

How do I find a drill bit size in Drill Size Charts?

You can easily find drill bit sizes by tapping the required size type and scrolling through the chart. A search bar is also available by scrolling up within any drill table.

What is the price of Drill Size Charts?

Drill Size Charts is available for a one-time purchase of $0.99. This purchase allows installation on all your iOS devices.

What devices is Drill Size Charts compatible with?

Drill Size Charts is a universal app compatible with iPhone, iPod Touch, and iPad devices. It supports all device orientations, including landscape and portrait.

How often is Drill Size Charts updated?

The latest version, 2.0, was released on September 24, 2015. While not frequently updated recently, the app provides stable reference functionality.

What is the age rating for Drill Size Charts?

Drill Size Charts has an age rating of 4+, making it suitable for a wide range of users, including younger students learning about tools and measurements.

Does Drill Size Charts have ads?

No, Drill Size Charts does not contain advertisements. It is a paid application designed to be ad-free for a better user experience.

Can I get support for Drill Size Charts?

Yes, you can contact the developer, Chewy Applications, for suggestions, requests, or support through the app or by emailing support@chewyapplications.com.