Author
Muhammad Sohaib
Founder, PressMath
Muhammad Sohaib founded PressMath to give print and DTF shops free, honest calculators — the same kind of sizing, DPI, film-cost and fee math operators need when quoting real jobs.
About Muhammad
PressMath started as a practical toolbox: one calculator per production question, formulas shown in plain language, and guides that pair with the tools instead of burying them under fluff.
Muhammad focuses on shop-facing utility — DPI and print size, gang sheets, DTF cost, Etsy and POD fees, and pricing helpers — so owners can sanity-check a quote before film, ink or ad spend is locked in.
Results on PressMath are estimates. Always verify against your equipment, supplier invoices and marketplace fee schedules. Corrections and custom calculator requests are welcome via the contact page.
Areas of expertise
- Print shop quoting
- DTF cost math
- Marketplace fees
- Calculator UX
- SEO for utility sites
Guides by Muhammad Sohaib
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.
How Much to Charge for Custom Print Shirts
Combine garment cost, decoration cost, setup, and markup into a quote customers accept — without undercharging.
Printify vs Printful Profit: How to Compare Before You List
A simple way to compare POD providers using base cost, shipping and fees — not marketing claims.
How to Plan DTF Gang Sheets Without Wasting Film
Grid packing, gaps, margins and pricing rules so mixed designs still make money.
T-Shirt Print Size Chart Explained (Adult Unisex)
Starting widths for left chest, full front, back and sleeve — and how to turn them into pixels.
Calculators maintained by Muhammad
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 or advanced DTF true-cost quoting: film, ink, powder, labour, waste, energy and overhead.
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 Profit Calculator
Compare Printify, Printful or any POD base cost against sell price, shipping and platform fees.
Every calculator and guide on PressMath is written and maintained for shop use: formulas are documented, examples are worked through, and FAQs cover the edge cases operators actually hit. Spot an error? Contact us and we will correct it.