Drill Calc

iOS app by Black Cat Systems. Utilities · Black Cat Systems

Store rating
4.11 / 5
Store rating count
19
Download price
2.99 USD
In-app purchases
Unknown
Version
2.5
Listing last refreshed
2026-09-06

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Store description excerpt

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.

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