Posted by Howard Lewis on 07/04/2021 15:17:20:
If you use an Involute gear cutter, it is likely to be marked with the df number, which is the depth of cut.
More usually referred to as d + f .
If you search for 'd + f gear' or 'whole depth of gear tooth', there is a lot of material available.
For metric gears, this one is good: https://khkgears.net/new/gear_knowledge/abcs_of_gears-b/basic_gear_terminology_calculation.html
For imperial gears (not your current challenge), this one is good: https://www.bostongear.com/-/media/Files/Literature/Brand/boston-gear/catalogs/p-1930-bg-sections/p-1930-bg_engineering-info-spur-gears.ashx