Best Drill Bit Converter Apps

188+ iOS apps curated and reviewed

4.7 avg rating
15 free apps
Updated May 2026

Looking for free drill bit converter apps? 15 of our 188+ tracked titles are free to download β€” no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for Drill Bit Converter

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

This application provides easy access to drill bit size charts, allowing users to quickly find decimal inch and metric size equivalents for various drill bit types, including US Number and Letter Gauge Sizes, Fractional-Inch Sizes, and Metric Sizes. A helpful reference tool for professionals and students, it features search functionality, support for all device orientations, and is available for use across multiple iOS devices.

Conversion Calculator Plus#3

Conversion Calculator Plus by Yan Liong Tan

Unit Converter
Worth Considering
πŸ“Š Productivity
4.7😞(15K ratings)
FreeAdsIn-App Purchases
Conversion Calculator Plus screenshot 1
Conversion Calculator Plus screenshot 2
Conversion Calculator Plus screenshot 3
Conversion Calculator Plus screenshot 4
Conversion Calculator Plus screenshot 5
Conversion Calculator Plus screenshot 6

"Explore the ultimate Unit Converter tool with Conversion Calculator Plus – your go-to Swiss army knife for effortless unit conversions. Simplify complex calculations and streamline your work effortlessly."

What We Love

  • πŸš€ Great app
  • πŸ‘ Easy to use
  • πŸš€ Comprehensive conversions
  • πŸ‘ Intuitive interface

Room to Improve

  • πŸ› Consent required for tracking
  • πŸ› Update problems
  • πŸ› Currency not updating

More Drill Bit Converter apps to explore

4
Unit Converter - Pro Units App
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Units Plus Converter is a versatile application capable of converting any unit of measurement into another. From length and weight to temperature and currency, this app provides a comprehensive tool for all your conversion needs. Download now for hassle-free unit conversions.

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Metric Conversion tool
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A must-have unit conversion app with over 30,000 conversions, 160 currencies, and detailed historical records. Easily convert weights, temperatures, lengths, areas, volumes, time, angles, and more. Access nine significant digits and fractional results.

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GlobeConvert Currency & Units
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Convert currencies quickly and easily with this user-friendly app. Access up-to-date exchange rates and make conversions on the go. Experience convenience at your fingertips. Try it now!

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Convertible: Unit Converter
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This application is a comprehensive unit converter that allows users to easily convert between various units of measurement, including standard and non-standard units, across multiple categories such as length, mass, area, and more. With its elegant interface, customizable themes, and unique features like fraction input and output, it helps users visualize and understand complex conversions in a fun and educational way, try it now!

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9
Drill and Tap Tool - Thread Tapping & Through Hole
Drill and Tap Tool - Thread Tapping & Through Hole
Drill and Tap Tool - Thread Tapping & Through Hole
by Chewy Applications
$1.99

This application helps users find the correct drill size for thread tapping operations by selecting thread type, tap size, and other variables, providing results in multiple units. It is a valuable reference tool for professionals and DIYers, ensuring accuracy and control in their operations.

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10
Converter+ (Units, Currencies)
Converter+ (Units, Currencies)
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Unit and Currency Converter: Access a comprehensive unit conversion tool featuring a wide range of currencies and units across various categories. Perform calculations with calculators for everyday needs, edit templates, and download user-contributed templates. Keep up-to-date with automatic currency exchange rate updates every 6 hours.

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Fancy Units Converter
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Unit Converter: Mila's Tools
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Experience quick and easy unit conversions with a free, fast, and elegant calculator tool from Mila's Tools. Convert various units such as Area, Bits, Bytes, Length, Temperature, and more effortlessly. Try it out now for hassle-free conversions!

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Convert Any Unit Lite
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Convert Any Unit Lite is a versatile app that simplifies unit conversions for users, offering a wide range of conversion options. Easily switch between various units for length, weight, volume, and more with a user-friendly interface. Download now to streamline your conversion needs.

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"An all-in-one conversion tool for engineers and scientists, featuring over 300 units across 32 categories, currency conversion, timezone conversion, and more. Switch between themes, create favorite lists, and enjoy a seamless user experience. Available in multiple languages – download now!"

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Unit Converter - Best Unit App
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A free unit converter app optimized for iPhone and iPad, featuring 12 categories for converting various units including area, currency, data, length, and more. Includes daily currency updates for 155 world currencies and is designed for easy use. Download now for quick and accurate unit conversions.

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Unit Converter Calculator Pro
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This application is a user-friendly tool for swiftly converting units across various metrics, making calculations hassle-free. Try it now for effortless unit conversions on-the-go.

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17
Drill Calc
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Drill Calc
by Black Cat Systems
$2.99

This application calculates the correct drill bit size for threaded holes based on bolt diameter, thread pitch, and percentage, supporting both inch and metric threads. It also provides tables of standard drill bit sizes, pipe sizes, and wood screw information, making it a handy tool for finding the right drill bit size.

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18
Unit Converter HD.
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WS Drill Bits
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Simplify your machining tasks with a comprehensive drill bit calculator. Quickly access a detailed size chart, determine optimal speeds and feeds for various materials, and calculate precise drill point depths for any angle.

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Get real-time currency exchange rates, set up rate alerts, and track multiple currencies with ease. Stay updated on global currency trends and make informed decisions. Download now to manage your finances more effectively!

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