Best Drill Size Charts Apps & Games

247+ iOS apps & games curated and reviewed

3.9 avg rating

13 free apps & games

Updated September 2026

Every iPhone needs a few good drill size charts apps and games. We benchmark 247+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Compare top Drill Size Charts Apps & Games (September 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions	$0.99	4.5★ (22)	No	No	Aug 2026
2	Screw Size Drill Bit Chart	Free	—	No	Yes	Sep 2026
3	Drill Bit Converter	$0.99	—	No	No	Jul 2026
4	Drill and Tap Tool - Thread Tapping & Through Hole	$1.99	4.3★ (30)	No	No	Aug 2026
5	Tap & Drill Size Reference	$0.99	—	No	No	Aug 2026
6	Drill Bit Matcher	Free	—	No	Yes	Jun 2026
7	Drill Speed	Free	5.0★ (2)	No	No	May 2026
8	Drill Collar	$0.99	—	No	No	May 2026

Top Picks for Drill Size Charts

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

Editor's Choice

🔍 Reference

4.5(22 ratings)

$0.99

Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions screenshot 1

Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions screenshot 2

Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions screenshot 3

Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions screenshot 4

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.

Screw Size Drill Bit Chart by Phuc Pham

Pilot Hole Gauge Tap Finder

Strong Contender

🔧 Utilities

0.0(0 ratings)

FreeIn-App Purchases

Drill Bit Converter by Dohmann Engineering Services

Worth Considering

🔧 Utilities

0.0(0 ratings)

$0.99

More Drill Size Charts apps to explore

Drill and Tap Tool - Thread Tapping & Through Hole

by Chewy Applications

$1.99

Calculate the correct drill bit size for your tapping operations. Supports various thread types and inch/metric measurements. Provides precise calculations for depth of thread and clearance.

Metric and US Standard tap/drill supportSpinning dial interface for easy selectionCalculates drill size for tapping

🔍 Reference

(30)

paid

Tap & Drill Size Reference

UNC UNF Metric Thread Chart

Find Bit & Pilot Hole Size

Drill Speed Calculator

Free

Easily calculate optimal drill speeds for various drill bits and materials with an intuitive icon-based interface. This app automatically adjusts options based on your selections and remembers your progress.

Intuitive icon-based interfaceWide selection of drill bits and materialsAutomatic option adjustment

This utility app helps you determine the correct drill bit size for threaded holes. It supports both inch and metric threads, calculates close and tight fit hole sizes, and provides tables for standard drill bit sizes and pipe information.

Calculates drill bit size for threaded holesSupports inch and metric threadsDisplays close and tight fit hole sizes

This application serves machinists, designers, and manufacturing personnel with essential drill bit calculations. It features a comprehensive drill size chart with decimal equivalents, a calculator for optimal speeds and feeds across various materials, and a tool for determining drill point depth based on angle.

Drill size and decimal equivalent chartFast vertical scrolling with color-coded valuesSliding scale for quick list navigation

📚 Education

(2)

free

Duncan Drill Calibration

Duncan Seed Drill Calibration

Free

💼 Business

(0)

Machinist Calc: Speeds Feeds

RPM, Chip Load & Tap Drill

Drilling productivity software

Free

📊 Productivity

(0)

Mila's Ring Sizer & Converter

Jewelry & Wedding Band Fit

Thread & Drill Calculator

By the power of the drill!!!

Free

🎮 Games

(0)

FitCheck: Hole Sizes & Fits

Screws, bearings & inserts

This application assists fuel haulers in accurately calculating product quantities when manually measuring tank levels. It simplifies the process of determining amounts for gasoline transport.

Manual tank gaugingProduct amount calculationGasoline hauler assistance

🔍 Reference

(1)

free

Ring Sizer : Finger Size

Ring Size & Finger Measure

Easily create a variety of charts with customizable options. Export or share your creations as images. Supports dark mode and multiple languages for a user-friendly experience.

Multiple chart types supportedExport and share as picturesCustomizable icons and appearance

🔧 Utilities

(3)

free with in-app purchases

FAQ about Drill Size Charts

What are the best drill size charts apps & games for iPhone?

Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions tops our drill size charts apps & games ranking as of September 2026, with a 4.5-star average from 22 App Store ratings, and it's priced at $0.99.

Are there free drill size charts apps & games for iPhone?

Yes — 13 of the top drill size charts apps & games we rank are free to download, including Screw Size Drill Bit Chart and Drill Bit Matcher.

Does Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions have ads or in-app purchases?

Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions has no ads and has no in-app purchases, according to its App Store listing as of September 2026.

How many drill size charts apps & games are on the App Store?

We track 247+ drill size charts apps & games on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.

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.