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

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

This app is a versatile unit and currency converter with a user-friendly interface. It supports a wide range of conversion categories, including real-world and crypto currencies, with automatic exchange rate updates. Customize your experience with design options, dark mode, and adjustable home screen layouts.

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
Unit Converter - Pro Units App
Unit Converter - Pro Units App
Convert Any Unit
Free

This app offers a powerful and user-friendly unit converter with 16 categories, including currency, length, and temperature. It allows for custom unit lists and provides live exchange rate updates for 148 currencies. Unlock all features with a one-time in-app purchase.

16 conversion categoriesCustom unit listsLive currency exchange rates
πŸ” Reference
(16K)
free with in-app purchases
5
Units Plus Converter
Units Plus Converter
Units Plus Converter
Convert Any Unit & Currency
$19.99

Easily convert between various units and currencies with a simple, intuitive interface. Features live currency updates for 155 world currencies, refreshed every 15 minutes. Optimized for a wide range of Apple devices, including iPads with Split View support.

Unit conversion across 12 categoriesLive currency updates for 155 currenciesOptimized for iPhone and iPad
πŸ”§ Utilities
(8.3K)
free
6
Metric Conversion tool
Metric Conversion tool
Metric Conversion tool
Unit and currency converter
Free

This app provides a comprehensive unit and currency converter with a user-friendly interface. It offers offline functionality, supports over 30,000 unit conversions, and includes more than 160 currencies with live exchange rates. Users can save favorite conversions and get precise results.

Offline functionalityOver 30,000 unit conversions160+ currencies with live rates
πŸ” Reference
(15K)
free
7
GlobeConvert Currency & Units
GlobeConvert Currency & Units
GlobeConvert Currency & Units
Convert Currency and Units
Free

Easily convert over 160 currencies and 350 physical units with real-time updates and offline capabilities. Create a favorites list for quick access to frequently used conversions and enjoy geo-based currency options. An ad-free version is available for purchase.

Real-time conversion160+ currencies supported350+ physical units supported
πŸ”§ Utilities
(79K)
free with in-app purchases
8
Convertible: Unit Converter
Convertible: Unit Converter
Convertible: Unit Converter
Currency and Unit Converter
Free

This app offers a comprehensive unit and currency conversion tool with a visually appealing interface and extensive unit options. It supports standard and non-standard units, compound conversions, and fraction input, making it versatile for various needs.

Extensive standard and non-standard unit conversionsCurrency conversion with 161 currenciesCompound unit conversion
πŸ”§ Utilities
(97)
paid
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

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
πŸ” Reference
(29)
paid
10
Converter+ (Units, Currencies)
Converter+ (Units, Currencies)
Converter+ (Units, Currencies)
Unit and Currency Converter
Free

This app offers a comprehensive unit and currency converter with a vast array of categories and calculators for everyday needs. It allows users to customize templates, download shared ones, and provides automatic exchange rate updates for 167 world currencies.

Extensive unit and currency conversionMultiple calculators (mortgage, loan, tip)Customizable and downloadable templates
πŸ“Š Productivity
(2.3K)
free with in-app purchases
11
Fancy Units Converter
Fancy Units Converter
Fancy Units Converter
Currency and Unit Converter
Free

This app offers a fast and user-friendly way to convert units and currencies. Customize your conversion lists and get instant results as you type, with support for over 350 units and 160 currencies. It also includes a built-in calculator and offline currency data.

Real-time conversion350+ physical units160+ currencies
πŸ”§ Utilities
(1.6K)
free with in-app purchases
12
Unit Converter: Mila's Tools
Unit Converter: Mila's Tools
Unit Converter: Mila's Tools
Metric Conversion Calculator +
Free

This app offers a comprehensive unit conversion tool with over 300 units across 27 categories. It supports compound units, date calculations, and conversions between various number systems, including historical units. The interface is designed for ease of use with smart keyboards and customizable display options.

27 conversion categories300+ unitsCompound unit support
πŸ”§ Utilities
(1.4K)
free with in-app purchases
13
Convert Any Unit Lite
Convert Any Unit Lite
Convert Any Unit Lite
Units & Currency Converter
Free

Quickly convert between thousands of units with an intelligent search and autocomplete feature. This app offers a streamlined interface, an integrated calculator, and the ability to save favorite conversions. It supports over 6,400 units across 51 categories, making it a comprehensive tool for all your conversion needs.

Intelligent unit search with autocompleteAutomatic category selectionIntegrated calculator
✈️ Travel
(47K)
ad-supported
14
Converter-Universal Conversion
Converter-Universal Conversion
Converter-Universal Conversion
by Trelleborg Sealing Solutions
Free

This app offers a comprehensive unit and hardness conversion tool with an easy-to-use interface. It includes currency conversion with updated exchange rates, over 300 engineering and scientific units, and a specialized hardness converter. Additional features like timezone conversion, pace calculation, and a standard calculator enhance its utility.

Currency converter with live exchange ratesOver 300 engineering and scientific unitsSpecialized hardness converter
πŸ”§ Utilities
(897)
free
15
Unit Converter - Best Unit App
Unit Converter - Best Unit App
Unit Converter - Best Unit App
Convert All Units and Currency
Free

Easily convert between a wide range of units across 20 categories, including length, weight, temperature, and more. Features live currency updates for 155 world currencies, refreshed daily. Designed for simplicity and visual appeal.

20 conversion categoriesLive currency updates155 world currencies
✈️ Travel
(172K)
free with in-app purchases
16
Unit Converter Calculator Pro
Unit Converter Calculator Pro
Unit Converter Calculator Pro
Simple With Metric & Imperial
Free

Easily convert between metric and imperial units for a wide range of measurements including area, speed, temperature, and weight. Supports scientific prefixes and offers a history of your conversions. No internet connection required.

Metric to Imperial unit conversionImperial to Metric unit conversionArea, speed, temperature, volume, weight conversions
πŸ”§ Utilities
(916)
free with in-app purchases
17
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
πŸ”§ Utilities
(13)
paid
18
Unit Converter HD.
Unit Converter HD.
Unit Converter HD.
30 categories, 700+ units
Free

Easily convert over 700 units across 30 categories with this powerful tool. It offers a user-friendly interface, dark mode support, and a backspace key for quick corrections. Save time on all your measurement conversion needs.

700+ Units of Measure30 Conversion CategoriesEasy-to-Use Interface
πŸ”§ Utilities
(642)
free with in-app purchases
19
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
πŸ“š Education
(2)
free
20
Currency & Unit Converter #
Currency & Unit Converter #
Currency & Unit Converter #
Scientific Unit Converter
Free

This app offers a comprehensive solution for converting units across more than 20 common categories, including over 400 units. It supports mixed units and currency exchange with real-time updates, making it useful for work, study, and daily life. The app features a scientific calculator and a user-friendly interface.

20+ Categories & 400+ UnitsMixed-Unit SupportCurrency Exchange
πŸ”§ Utilities
(217)
free