Best Drill Size Charts Apps & Games

249+ iOS apps & games curated and reviewed

4.3 avg rating

12 free apps & games

Updated November 2026

Every iPhone needs a few good drill size charts apps and games. We benchmark 249+ 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 (November 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	Oct 2026
2	Screw Size Drill Bit Chart	Free	—	No	Yes	Oct 2026
3	Drill and Tap Tool - Thread Tapping & Through Hole	$1.99	4.3★ (30)	No	No	Oct 2026
4	Tap & Drill Size Reference	$0.99	—	No	No	Oct 2026
5	Drill Bit Converter	$0.99	—	No	No	Oct 2026
6	Drill Speed	Free	5.0★ (3)	No	No	Oct 2026
7	Tap & Drill: Tap Drill Chart	Free	—	—	No	Oct 2026
8	Drill Calc	$2.99	4.1★ (19)	No	No	Oct 2026

Top Picks for Drill Size Charts

#1

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

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.

#2

Screw Size Drill Bit Chart by Phuc Pham

Pilot Hole Gauge Tap Finder

Strong Contender

0.0(0 ratings)

FreeIn-App Purchases

Screw Size Drill Bit Chart screenshot 1

Screw Size Drill Bit Chart screenshot 2

Screw Size Drill Bit Chart screenshot 3

Screw Size Drill Bit Chart screenshot 4

Screw Size Drill Bit Chart screenshot 5

Screw Size Drill Bit Chart screenshot 6

#3

Drill and Tap Tool - Thread Tapping & Through Hole by Chewy Applications

Worth Considering

4.3(30 ratings)

$1.99

Drill and Tap Tool - Thread Tapping & Through Hole screenshot 1

Drill and Tap Tool - Thread Tapping & Through Hole screenshot 2

Drill and Tap Tool - Thread Tapping & Through Hole screenshot 3

Drill and Tap Tool - Thread Tapping & Through Hole screenshot 4

Drill and Tap Tool - Thread Tapping & Through Hole screenshot 5

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.

More Drill Size Charts apps to explore

Tap & Drill Size Reference

Tap & Drill Size Reference

Tap & Drill Size Reference

UNC UNF Metric Thread Chart

Drill Bit Converter

Drill Bit Converter

Drill Bit Converter

by Dohmann Engineering Services

Drill Speed Calculator

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

Tap & Drill: Tap Drill Chart

Tap & Drill: Tap Drill Chart

Tap & Drill: Tap Drill Chart

by Atanas Dimitrov

by Black Cat Systems

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

by zhandos uakanov

Machinist Tap Drill Chart

Machinist Tap Drill Chart

Machinist Tap Drill Chart

Thread, screw & hole sizes

RingSizer – Ring Size Tool

RingSizer – Ring Size Tool

RingSizer – Ring Size Tool

Measure & Convert Ring Sizes

FitCheck: Hole Sizes & Fits

FitCheck: Hole Sizes & Fits

FitCheck: Hole Sizes & Fits

Corrected for printer or mill

Drill with Lantern

Drill with Lantern

Drill with Lantern

Drilling productivity software

📊 Productivity

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

Tap & Drill Pro

Tap & Drill Pro

Tap & Drill Pro

Thread & Drill Calculator

Drill Baby,Drill

Drill Baby,Drill

Drill Baby,Drill

Drill down first to win!

Compete against others to drill down and find hidden treasure. Navigate through obstacles and outmaneuver opponents to be the first to reach the prize. Test your drilling skills in this competitive treasure hunt.

Drill down to find treasureCompete against other playersAvoid obstacles

Spiral Drill Run

Spiral Drill Run

Spiral Drill Run

By the power of the drill!!!

Ring Sizer : Finger Size

Ring Sizer : Finger Size

Ring Sizer : Finger Size

Ring Size & Finger Measure

📊 Productivity

Tank Charts 5.1

Tank Charts 5.1

Tank Charts 5.1

by Donald Johnson

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

Tap Drill Pocket

Tap Drill Pocket

Tap Drill Pocket

Thread Chart for Machinists

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 November 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 — 12 of the top drill size charts apps & games we rank are free to download, including Screw Size Drill Bit Chart and Drill Speed.

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 November 2026.

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

We track 249+ drill size charts apps & games on the iOS App Store as of November 2026, ranked by rating, recency, and analysis of real user reviews.