Brush size relative to canvas
Enter canvas long side — get three brush width guides (sketch / block / detail) for stroke scale.
Calculator form
How to use
Fill in the fields
Enter values for “Brush size relative to canvas” — hints sit under each field.
Read the result
Numbers update as soon as you change inputs.
Copy or share
Use the result buttons to copy text or the page link.
Apply it
Match the output to your deliverable and set up your canvas or quote.
Sample calculations
50 cm canvas
Sketch ~5 mm, block ~10 mm, detail ~2 mm
Common mistakes
Mistake
Guessing pixel sizes → Calculate before you create the file.
Mistake
Mixing screen and print DPI → For print, use 150–300 DPI from physical size in cm.
Mistake
Ignoring file weight → Large canvases and many layers need RAM and disk space.
FAQ
Filbert vs flat?
Numbers are working edge width in mm for medium stiffness brushes.
Lock it in with practice
Open the free editor and apply the result — a short sketch beats more reading.