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PressMath

Free calculators and guides for print shops, DTF presses and online sellers. Size a print, check DPI, price film, or see marketplace profit — with the formula and a worked example on every tool.

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Featured tools

Start with the calculators shops use daily

CM to Inches Converter (Print)

Convert centimetres to inches for print sizes, with optional 300 DPI pixel width.

Pixels to Inches Calculator

Convert image pixels to print inches, mm and cm at any DPI.

DTF Cost Calculator (Basic & Advanced)

Two modes: Basic fast quote, or Advanced true-cost with CMYK/white ink, film roll, powder, electricity, labour, overhead, maintenance, waste and packaging.

Etsy Fee & Profit Calculator

Estimate Etsy transaction, processing, ads and listing fees — see net profit before you publish.

Inches to Pixels Calculator

Convert print inches to pixel dimensions at any DPI for Photoshop, Canva and RIP exports.

POD Provider Comparison Calculator

Compare Printify vs Printful vs Custom side by side: base cost, shipping, platform fees, profit and margin.

Guides

Answer the question, then open the tool

What DPI Should You Use for DTF Transfers?

A practical DPI target for DTF artwork, how to check your file before print, and when to resize the canvas.

How to Price DTF Prints (Cost + Markup Method)

Build a repeatable DTF quote: film area, ink, powder, waste, labour, then markup — without guessing.

A4 Size in Pixels at 300 DPI (and Other Paper Sizes)

Exact pixel dimensions for A4, US Letter, and Tabloid at 300 DPI — plus bleed canvas sizes.

Etsy Fees Explained for Print-on-Demand Sellers

Transaction, processing, listing, and ads — what actually hits margin on a POD order.

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Topics

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Shop & Seller Pricing

Etsy fees, markup and customer quotes

Why PressMath

Built for shop quoting — not keyword filler

PressMath is a utility hub for print shops, DTF operators and sellers who need clear math before they buy film, quote a job or publish a listing. Every important calculator shows the formula, a worked example, assumptions and FAQs — so you can trust the number, then verify against your own costs.

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