Canvas & Surface Calculators
Calculators for canvas sizing, stretcher bars, gesso coverage, panel dimensions and surface preparation.
Canvas Size Calculator
Calculate canvas dimensions including wrap-around allowance for gallery wrap and stapling edges. Free online calculator, no signup required.
Stretcher Bar Calculator
Work out stretcher bar lengths, cross braces and corner keys needed for your canvas. Includes brace spacing for large canvases.
Canvas Area Calculator
Calculate the total area of canvas fabric needed including overlap for stapling. Works for single canvases or cutting multiples.
Gesso Coverage Calculator
Calculate how much gesso primer you need for your canvas or wood panel based on surface area, absorbency and number of coats applied.
Panel Size Calculator
Work out wood panel dimensions and cradling requirements for rigid painting surfaces. Covers MDF, birch plywood and hardboard panels.
Canvas Cost Calculator
Estimate the total material cost of canvas fabric, stretcher bars, gesso and staples for building your own stretched canvases.
Aspect Ratio Calculator
Calculate equivalent canvas dimensions when scaling artwork up or down. Detects the golden ratio and common art proportions automatically.
Canvas Weight Calculator
Estimate the weight of a stretched canvas including stretcher bars, fabric and paint layers. Useful for shipping and hanging.
8 free calculators in Canvas & Surface
Canvas & Surface Preparation
Choosing and preparing the right painting surface is the first step in any artwork. Whether you stretch your own canvases, build wood panels, or buy pre-stretched options, getting the dimensions and materials right from the start ensures your work lasts.
The canvas size calculator works out the total canvas fabric dimensions including gallery wrap allowance and stapling overlap. Our stretcher bar calculator determines the exact bar lengths, cross braces and corner keys you need.
Priming is essential for a good painting surface. The gesso coverage calculator tells you exactly how much gesso to buy based on your canvas area and number of coats. Most artists apply 2-3 coats of gesso, sanding lightly between each coat for a smooth finish.