Diamond painting calculator
Questions
How many drills are in a 30 × 40 cm diamond painting?
With 2.5 mm square drills, 120 across and 160 down: 19,200 drills for full coverage. Round drills (2.8 mm) need about 15,200.
What size are diamond painting drills?
Square drills are usually 2.5 mm and round drills 2.8 mm, though sizes vary slightly between brands.
Why add spare drills?
Kits include extras because a few drills are always lost, cracked or misshapen. 10% is a comfortable margin when ordering custom drills.