---
title: "Drill Calc - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "Need to find the right drill bit size for a hole? Drill Calc calculates the correct drill bit size to use for threaded holes, based on the bolt (tap) diameter and thread pitch and percentage, for both"
---

# Drill Calc — United States

![Drill Calc App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/7d/5a/73/7d5a738c-98f1-3516-f79f-cd1bff2cb919/AppIcon-0-0-1x_U007epad-0-85-220.png/400x400bb.png)

**Developer:** [Black Cat Systems](https://apptail.io/developer/black-cat-systems-Gpc) (United States)
**Category:** Utilities
**Rating:** 4.1/5 (18 ratings)
**Price:** Free
**Bundle ID:** com.blackcatsystems.DrillCalc
**Store:** Apple App Store
**Country:** United States
**Version:** 2.5 (released 2024-11-22)
**Original Release:** 2009-02-10

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id304434324)
**AppTail Page:** [https://apptail.io/app/drill-calc-oGEe/united-states](https://apptail.io/app/drill-calc-oGEe/united-states)

## Drill Calc Description
Need to find the right drill bit size for a hole? Drill Calc calculates the correct drill bit size to use for threaded holes, based on the bolt (tap) diameter and thread pitch and percentage, for both inch and metric threads.  Close and tight fit hole sizes for many popular drill sizes are also displayed. 

It also has tables of standard inch fractional and numeric drill bit sizes, as well as complete information for various pipe sizes. There is also detailed information about the commonly used sizes of wood screws. 

Buy your copy of Drill Calc today, and put away your drill chart.

## Drill Calc Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/23/99/1f/23991faa-ecea-f984-6f25-51ae1465885e/pr_source.png/640x960.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/cb/78/a9/cb78a907-d8aa-9a69-2f00-1f3b10f2fba2/pr_source.png/640x960.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/0c/56/ba/0c56ba33-526e-7fac-1e8c-e580d0f09b1c/pr_source.png/640x960.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/91/07/0f/91070f4a-aa1d-8d31-ea2a-5bc157288a8a/pr_source.png/640x960.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/c8/75/38/c8753804-448c-f051-690d-c1a321096bbe/pr_source.png/640x960.png)

## Drill Calc Rating Breakdown in United States
- 5 stars: 11 (61%)
- 4 stars: 3 (17%)
- 3 stars: 1 (6%)
- 2 stars: 0 (0%)
- 1 stars: 3 (17%)

## Drill Calc Reviews in United States

### *---- "App fail to load"
I was unable to access the app after downloading it.  Restarting my phone did not repair it.  Money wasted.
-- Bultaco643, 2024-02-02

### ***** "Awesome"
This app puts at my fingers all the data I could ever need in the machine shop when tapping time comes around. Very detailed and accurate.
-- Gilberto Diaz, 2015-09-02

### ***** "Drill Tap"
Excellent Reference...
-- Brint6, 2014-04-15

### ****- "Good, but could be better"
I am a hobbyist machinist.  I am always using Drill Calc for looking up drill sizes when I am threading.  One feature I would appreciate is an all encompassing  decimal lookup chart.  This single chart would contain fractional, lettered, numbered and metric drill sizes. 
I also would find it helpful if you supplied the data for doing external threading.
-- Billw37, 2012-11-10

### ***** "V 2.0 works great & w/Pipe Thd data"
This is great; all the Inch - Metric and Pipe Information in one app.

We deal with both english and metric taps at the machine shop I work for, so this makes it a very handy app.
-- W8WCA, 2010-09-15

### ****- "Works well"
Functionality of app is great!  Good clean layout. I agree that pipe theads would be a great addition, as well as fine threads for metric taps. Clearance drills, counterbores, and reamer drill sizes would also be a welcomed upgrade. I would pay extra for those options even.   Keep up the good work
-- Dieguy, 2009-12-01

### ****- "Works fine"
It is a plain ol' drill chart, and it works just fine.  Thanks!  Would like to have pipe threads too, though.
-- TOCC, 2009-05-30

### ****- "Good, needs though-hole measurements"
As far as I can tell does not have though-hole measurements, which would be easy to add to each bolt size and very useful
-- bavetta, 2009-04-24

### ***** "Can't live without it"
Great tool for any tool and die maker.
-- Robert machine shop, 2009-03-29

[View all Drill Calc reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)



## Drill Calc Discovered Keywords
- drill calc

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## Drill Calc Available In
- [United States](https://apptail.io/app/drill-calc-oGEe/united-states)
- [United Kingdom](https://apptail.io/app/drill-calc-oGEe/united-kingdom)
- [Mexico](https://apptail.io/app/drill-calc-oGEe/mexico)
- [Canada](https://apptail.io/app/drill-calc-oGEe/canada)
- [Switzerland](https://apptail.io/app/drill-calc-oGEe/switzerland)
- [Australia](https://apptail.io/app/drill-calc-oGEe/australia)
- [Belarus](https://apptail.io/app/drill-calc-oGEe/belarus)
- [Chile](https://apptail.io/app/drill-calc-oGEe/chile)
- [China](https://apptail.io/app/drill-calc-oGEe/china)
- [Colombia](https://apptail.io/app/drill-calc-oGEe/colombia)
- [Czechia](https://apptail.io/app/drill-calc-oGEe/czechia)
- [Germany](https://apptail.io/app/drill-calc-oGEe/germany)
- [Denmark](https://apptail.io/app/drill-calc-oGEe/denmark)
- [Dominican Republic](https://apptail.io/app/drill-calc-oGEe/dominican-republic)
- [Algeria](https://apptail.io/app/drill-calc-oGEe/algeria)
- [Ecuador](https://apptail.io/app/drill-calc-oGEe/ecuador)
- [Egypt](https://apptail.io/app/drill-calc-oGEe/egypt)
- [Spain](https://apptail.io/app/drill-calc-oGEe/spain)
- [Finland](https://apptail.io/app/drill-calc-oGEe/finland)
- [France](https://apptail.io/app/drill-calc-oGEe/france)
- [Greece](https://apptail.io/app/drill-calc-oGEe/greece)
- [Hong Kong SAR China](https://apptail.io/app/drill-calc-oGEe/hong-kong)
- [Croatia](https://apptail.io/app/drill-calc-oGEe/croatia)
- [Indonesia](https://apptail.io/app/drill-calc-oGEe/indonesia)
- [Ireland](https://apptail.io/app/drill-calc-oGEe/ireland)
- [Israel](https://apptail.io/app/drill-calc-oGEe/israel)
- [India](https://apptail.io/app/drill-calc-oGEe/india)
- [Italy](https://apptail.io/app/drill-calc-oGEe/italy)
- [Jordan](https://apptail.io/app/drill-calc-oGEe/jordan)
- [Japan](https://apptail.io/app/drill-calc-oGEe/japan)
- [South Korea](https://apptail.io/app/drill-calc-oGEe/south-korea)
- [Kuwait](https://apptail.io/app/drill-calc-oGEe/kuwait)
- [Kazakhstan](https://apptail.io/app/drill-calc-oGEe/kazakhstan)
- [Lebanon](https://apptail.io/app/drill-calc-oGEe/lebanon)
- [Latvia](https://apptail.io/app/drill-calc-oGEe/latvia)
- [Malaysia](https://apptail.io/app/drill-calc-oGEe/malaysia)
- [Nigeria](https://apptail.io/app/drill-calc-oGEe/nigeria)
- [Netherlands](https://apptail.io/app/drill-calc-oGEe/netherlands)
- [Norway](https://apptail.io/app/drill-calc-oGEe/norway)
- [New Zealand](https://apptail.io/app/drill-calc-oGEe/new-zealand)
- [Oman](https://apptail.io/app/drill-calc-oGEe/oman)
- [Peru](https://apptail.io/app/drill-calc-oGEe/peru)
- [Philippines](https://apptail.io/app/drill-calc-oGEe/philippines)
- [Pakistan](https://apptail.io/app/drill-calc-oGEe/pakistan)
- [Poland](https://apptail.io/app/drill-calc-oGEe/poland)
- [Portugal](https://apptail.io/app/drill-calc-oGEe/portugal)
- [Romania](https://apptail.io/app/drill-calc-oGEe/romania)
- [Russia](https://apptail.io/app/drill-calc-oGEe/russia)
- [Saudi Arabia](https://apptail.io/app/drill-calc-oGEe/saudi-arabia)
- [Sweden](https://apptail.io/app/drill-calc-oGEe/sweden)
- [Singapore](https://apptail.io/app/drill-calc-oGEe/singapore)
- [Thailand](https://apptail.io/app/drill-calc-oGEe/thailand)
- [Türkiye](https://apptail.io/app/drill-calc-oGEe/turkey)
- [Taiwan](https://apptail.io/app/drill-calc-oGEe/taiwan)
- [South Africa](https://apptail.io/app/drill-calc-oGEe/south-africa)
- [Argentina](https://apptail.io/app/drill-calc-oGEe/argentina)
- [Austria](https://apptail.io/app/drill-calc-oGEe/austria)
- [Azerbaijan](https://apptail.io/app/drill-calc-oGEe/azerbaijan)
- [Belgium](https://apptail.io/app/drill-calc-oGEe/belgium)
- [Brazil](https://apptail.io/app/drill-calc-oGEe/brazil)
- [United Arab Emirates](https://apptail.io/app/drill-calc-oGEe/united-arab-emirates)
- [Vietnam](https://apptail.io/app/drill-calc-oGEe/vietnam)
- [Ukraine](https://apptail.io/app/drill-calc-oGEe/ukraine)

---

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