Where these calculators fit in a project
A typical piece passes through them roughly in order. Before you buy a support, the Canvas Size Calculator converts the size, finds the nearest stock canvas in US inches or French Figure, Paysage and Marine sizes, and draws it to scale next to a person or a sofa. If the composition began as a sketch or a photo in a different shape, the Aspect Ratio Calculator shows what a crop to the new proportions will cost you before you commit.
Once the work is finished and photographed or scanned, the DPI & Print Size Calculator tells you how large it will print and at which sizes the quality starts to slip. Pricing comes last: the Art Pricing Calculator for originals, the Commission Price Calculator for custom work, and the framing, mural, Etsy and gallery-split tools for everything around the sale.
Which one to open first
- You’re ordering canvases or frames from another country. Start with canvas size; US and European stock sizes rarely line up, and the table shows how far apart they are.
- A print shop asked for “a 300 DPI file”. Open the DPI calculator and drop the image in. It reads the pixel size locally and lists every common print size with its real resolution.
- You don’t know what to charge. If you’ve sold a few originals, enter them in the past-sales tab of the pricing calculator and let it find your rate. If you haven’t, cost plus time gives you a floor.
- A client wants two characters and a background by Friday. The commission calculator itemizes every extra and shows what the PayPal or Stripe fees leave you.
Numbers worth remembering
One inch is exactly 2.54 cm, and every conversion on these pages starts there. At about 12 in (30 cm), normal eyesight resolves roughly 300 dots per inch; a print viewed from twice as far needs only half the resolution, which is why posters get away with 150 DPI.
On the money side, a gallery taking 50% means your retail price has to be twice what you need to receive, frame included. And a deposit plus a balance means paying a platform’s fixed fee twice, so small commissions are often cheaper to collect in one payment.