DTF Print Size Calculator — Pixels to Inches & CM Converter
If you have ever ordered a transfer and been surprised by how small it came back, the reason is almost always a misunderstanding between pixel dimensions and physical print size. A 1000×1000 pixel file is not a 10×10cm print — it depends entirely on the DPI.
This calculator converts in both directions: enter your pixel dimensions and DPI to see the physical print size, or enter your target physical size to get the exact pixel dimensions you need in your design file.
The formula every DTF seller needs to know
Physical size = Pixels ÷ DPI × 2.54 (for cm). So a 3543×3543 pixel file at 300 DPI = 3543 ÷ 300 × 2.54 = 30cm. This is why the standard DTF file for a 30cm design requires exactly 3543×3543 pixels at 300 DPI.
What DPI should I use for DTF?
300 DPI is the industry standard minimum. Some sellers use 350-400 DPI for very detailed or fine-line designs. Going higher than 400 DPI adds file size without visible quality improvement for most DTF applications. Never submit files below 300 DPI — the output will look soft or blurry on anything larger than a small chest logo.
Frequently Asked Questions
What pixel size do I need for a 30cm DTF transfer?
For a 30×30cm transfer at 300 DPI: 30 ÷ 2.54 × 300 = 3543 pixels. Your canvas should be 3543×3543 pixels. For a 30×40cm: 3543×4724 pixels.
My Canva design is 1080×1080 pixels — how big will it print?
At 300 DPI, 1080 pixels = 1080 ÷ 300 × 2.54 = 9.14cm. So your design would print at approximately 9×9cm. If you want a 30cm design, you need to set your Canva canvas to 3543×3543 pixels using Custom Size.
Does higher DPI always mean better quality for DTF?
300 DPI is sufficient for most DTF designs. 350-400 DPI gives slightly better results for very fine lines and small text. Above 400 DPI the visual difference is minimal but file size increases significantly. Never go below 300 DPI.
I designed at 72 DPI. Can I just change the DPI in Photoshop?
No. Changing DPI in Photoshop without resampling only changes the metadata, not the actual pixel count. To get a 300 DPI file from a 72 DPI design, you need to recreate it from scratch at 300 DPI. Upscaling a 72 DPI file to 300 DPI adds blur, not quality.