Best Drill Size Charts Apps & Games

225+ iOS apps & games curated and reviewed

4.3 avg rating
16 free apps & games
Updated July 2026

Every iPhone needs a few good drill size charts apps and games. We benchmark 225+ 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 (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric ConversionsDrill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions$0.994.5★ (22)NoNoAug 2026
2FSWizardFSWizardFree4.6★ (47)NoNoAug 2026
3Drill and Tap Tool - Thread Tapping & Through HoleDrill and Tap Tool - Thread Tapping & Through Hole$1.994.3★ (30)NoNoAug 2026
4Tap & Drill Size ReferenceTap & Drill Size Reference$0.99NoNoJul 2026
5Screw Size & Drill Bit ChartScrew Size & Drill Bit ChartFreeNoNoJul 2026
6WS Drill BitsWS Drill BitsFree5.0★ (2)NoNoMay 2026
7iEngineeriEngineerFree4.5★ (191)NoYesJul 2026
8Oil Well DrillingOil Well DrillingFree4.2★ (6.4K)YesYesAug 2026

Top Picks for Drill Size Charts

FSWizard#2

FSWizard by Eldar Gerfanov

CNC Machinist Calculator
Strong Contender
📊 Productivity
4.6(47 ratings)
Free
FSWizard screenshot 1
FSWizard screenshot 2
FSWizard screenshot 3
FSWizard screenshot 4
FSWizard screenshot 5
FSWizard screenshot 6

This app is a comprehensive calculator for CNC machinists, simplifying the calculation of speeds and feeds for milling, drilling, and turning operations. It automatically suggests optimal cutting conditions based on material choices and supports advanced features like chip thinning and HSM machining.

More Drill Size Charts apps to explore

4
Tap & Drill Size Reference
Tap & Drill Size Reference
Tap & Drill Size Reference
UNC UNF Metric Thread Chart
$0.99
🔧 Utilities
(0)
5
Screw Size & Drill Bit Chart
Screw Size & Drill Bit Chart
Screw Size & Drill Bit Chart
Pick the right size
Free
🔧 Utilities
(0)
6
WS Drill Bits
WS Drill Bits
WS Drill Bits
by Rein Rapp
Free

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
7
iEngineer
iEngineer
iEngineer
by Perfectly Simple Apps LLC
Free

Access a vast database of screw and bolt information, including dimensions, material grades, and strength properties for both US and metric fasteners. Features a comprehensive drill chart, unit conversion, and customizable material displays.

Extensive US screw databaseMetric screw database (in-app purchase)Detailed dimensions and material grades
🔍 Reference
(191)
free with in-app purchases
8
Oil Well Drilling
Oil Well Drilling
Oil Well Drilling
How deep can you take drill?
Free

Dig deep into the earth to collect treasures and manage your oil well drilling company. Upgrade your drill, manage fuel, cooling, and speed to reach new depths and discover valuable resources. Earn cash by collecting gold and gems to enhance your drilling capabilities.

Dig and collect treasuresManage fuel, cooling, and speedHunt for oil
🎮 Games
(6.4K)
free with in-app purchases
9
Flange Bolt Size & Torque
Flange Bolt Size & Torque
Flange Bolt Size & Torque
Size & Torque Patterns
Free

Instantly access flange, pipe, and bolt data offline. Quickly find bolt sizes, torque patterns, flange dimensions, and pipe specifications. Ideal for pipefitters and steamfitters needing rapid access to piping information.

Offline data accessInstant data lookupsFlange bolting data
🔍 Reference
(363)
free with in-app purchases
10
Drill Speed
Drill Speed
Drill Speed
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
🔍 Reference
(2)
free
11
Ruler ++
Ruler ++
Ruler ++
Measure lengths
Free

This app allows you to measure lengths accurately in both inches and centimeters. It provides a simple and straightforward tool for quick measurements.

Measure in inchesMeasure in centimetersAccurate length measurement
📊 Productivity
(884)
free with in-app purchases
12
Measuring Tape & Ruler:Metrix
Measuring Tape & Ruler:Metrix
Measuring Tape & Ruler:Metrix
Ring Sizer,Level,Measure Tool
Free

Transform your smartphone into a precise digital measuring tape. Measure objects, size furniture, and scan rooms in 3D using augmented reality. Supports multiple units and allows saving/sharing measurements.

Real-time object measurementAR room scanningFurniture sizing
🔧 Utilities
(888)
subscription
13
i-Boating: Marine Charts & Gps
i-Boating: Marine Charts & Gps
i-Boating: Marine Charts & Gps
Lake Maps,Tide,Sailing Plotter
Free

Navigate waterways with detailed marine charts and GPS. Features include route planning, voice-guided navigation, tide and current predictions, and track recording. Offers extensive map coverage for various regions and inland rivers.

Detailed vector marine chartsRoute planning and editingVoice-guided navigation
🗺️ Navigation
(15K)
free with in-app purchases
14
Drill Calc
Drill Calc
Drill Calc
by Black Cat Systems
$2.99

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
🔧 Utilities
(19)
paid
15
Drill Bit Nozzle Calculator
Drill Bit Nozzle Calculator
Drill Bit Nozzle Calculator
by NOV Inc.
Free

Calculate essential drilling parameters like bit TFA, pressure drop, and impact force using bit size, flow rate, and mud weight. Offers a reverse calculation to determine nozzle sizes for a specific total flow area and number of nozzles.

Calculate bit TFACalculate pressure dropCalculate HSI
💼 Business
(2)
free
16
Rig Count
Rig Count
Rig Count
by Baker Hughes Company
Free

This app provides an interactive analysis of US rotary rig counts, a key indicator for the drilling industry. It helps users understand demand for products used in hydrocarbon extraction and processing.

Interactive rig count analysisBaker Hughes US rotary rig dataBusiness barometer for drilling industry
💼 Business
(23)
free
17
Shoe Size Converter & Chart
Shoe Size Converter & Chart
Shoe Size Converter & Chart
by Arsosa Network Inc.
Free

Easily convert shoe sizes across different regions, genders, and age groups. Get accurate conversions in cm and inches with a clear, readable chart for men, women, and children.

Cross-region shoe size conversionAdult and children's size optionsConversions in cm and inches
🔧 Utilities
(27)
free with in-app purchases
18
Halliburton eRedBook® Mobile
Halliburton eRedBook® Mobile
Halliburton eRedBook® Mobile
by Halliburton
Free

This app provides essential data and calculators for oil and gas well calculations. Access key dimensions, strengths, and specifications for tubulars to quickly determine volumes and capacities. Supports multiple unit systems for flexible calculations.

Instant access to pipe dimensions and strengthsQuickly calculate capacity and annulus volumesView volume measurements in Metric or Imperial units
💼 Business
(30)
free
19
ThreadKing
ThreadKing
ThreadKing
Ultimate Reference for Threads
Free

This app serves as a comprehensive reference and calculator for various thread types and dimensions. It provides detailed information on Metric and UN threads, including tap sizes and thread calculations for cutting and forming taps. Users can also find drill size charts and calculate RPM and feed rates for different materials.

Metric and UN thread referenceDrill/Tap size chartsPipe thread information
📊 Productivity
(12)
free
20
DigiTrak LWD
DigiTrak LWD
DigiTrak LWD
Real-time access to bore data
Free

Access and manage real-time drilling data from your mobile device. View bore data, make edits, and generate reports for immediate sharing and informed decisions.

Real-time bore data accessEdit and annotate drill dataGenerate customizable PDF reports
📊 Productivity
(8)
free

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 July 2026, with a 4.5-star average from 22 App Store ratings, and it's priced at $0.99.
Yes — 16 of the top drill size charts apps & games we rank are free to download, including FSWizard and Screw Size & Drill Bit Chart.
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 July 2026.
We track 225+ drill size charts apps & games on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
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.
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.