Design5 min read
Clothify tools
Print Size and DPI Calculator for Clothing
Check image resolution at your intended print size. Preview artwork and calculate the pixels you need.
- Image stays on your device
- Inches or centimeters
- CSV export
See your print at full size
Choose an image or type its pixel size, or try the example.
- Effective DPI against your target
- Artwork on a T-shirt, drawn to scale
- Resolution at other print widths
How to use it
Add your artwork
Choose the original PNG, JPEG or WebP file, or type its width and height in pixels.
Set the print width
Type the width it will print at, or tap a T-shirt placement such as left chest or full front.
Set your target
Use the resolution in your supplier’s file guide for that product. The tool starts at 300 DPI.
Check the result
Read the effective DPI, see the art on a shirt at scale and find the widest size that still meets your target.
Worked example: a 3,000 pixel graphic on a full front
This is the scenario the Try an example button loads: an image 3,000 pixels wide and 3,600 tall, printed 12 inches wide against a 300 DPI target.
Twelve inches is the width of the full front print area on the T-shirt in Clothify’s placement guide. Spread across that width, 3,000 pixels give 250 pixels to every inch, so the effective resolution is 250 DPI. The height follows the image’s proportions: 3,600 pixels at the same density print 14.4 inches tall, which still fits inside the 16 inch print area.
That is below the 300 DPI target. There are two honest fixes. Print smaller: 3,000 pixels reach 300 DPI at 10 inches wide. Or export a larger original: a 12 inch print at 300 DPI needs 3,600 × 4,320 pixels. If the supplier’s guide for the product asks for 150 DPI instead, the original file already clears it.
- Effective resolution
- 250 DPI
- Print size
- 12 × 14.4 in
- Pixels for 300 DPI
- 3,600 × 4,320
- Widest at 300 DPI
- 10 in
The arithmetic
- Image width3,000 px
- divided byPrint width12 in
- equalsEffective resolution250 DPI
The formula
Print resolution is how many image pixels land on each inch of fabric. It depends only on the pixel width and the printed width.
Effective resolution
Image width in pixelsdivided byPrint width in inchesequalsEffective DPI
- Print width in inches
- Centimeters are divided by 2.54 first. One inch is exactly 2.54 cm.
What it leaves out
- It measures resolution only. Colors, thin lines, soft edges and transparency need their own check.
- The DPI number saved inside a file is ignored. Only the pixel dimensions decide print detail.
- Upscaling a small image makes a bigger file but does not add the missing detail.
- SVG and PDF files are not measured here. Export them to PNG at the print size first.
- The shirt outline is schematic. Print areas differ by product and size, so check the product’s own file guide.
- A file that passes is not approved for production. Order a physical sample before you sell.
Method and sources
Print areas and widths come from Clothify’s T-shirt design placement guide, which records Printful print files for a Bella+Canvas 3001 tee and a Gildan 18500 hoodie, size M, on November 8, 2026, plus Clothify’s own editor limits.
Printful’s print file preparation guidance describes 150 DPI for many apparel products and higher targets for some smaller or detailed work. Check the guide for your exact product.
Your image is read by this browser page only. It is never uploaded, and the preview is released when you remove the image, reset or leave.
Pixels needed for common print areas
The pixel size a file needs to print each common T-shirt and hoodie placement at 150 and 300 DPI. Width only where the placement has a width limit but no fixed height.
| Placement | Recorded on | Size (in) | At 150 DPI | At 300 DPI |
|---|---|---|---|---|
| Left chest logo | T-shirt, Clothify limit | 3.5 wide | 525 wide | 1,050 wide |
| Sleeve | T-shirt, Printful | 4 × 3.5 | 600 × 525 | 1,200 × 1,050 |
| Center chest | T-shirt, Clothify limit | 4.5 wide | 675 wide | 1,350 wide |
| Upper back | T-shirt, Clothify limit | 11 wide | 1,650 wide | 3,300 wide |
| Full front or back | T-shirt, Printful | 12 × 16 | 1,800 × 2,400 | 3,600 × 4,800 |
| Hoodie front | Gildan 18500, Printful | 14 × 14 | 2,100 × 2,100 | 4,200 × 4,200 |
Questions
What DPI do I need for a T-shirt print?
Use the number in your supplier’s file guide for that exact product. Printful’s print file guidance describes 150 DPI for many apparel products and higher targets for some smaller or detailed work. This tool starts at 300 DPI as a stricter target, and you can change it.
How many pixels do I need for a 12 by 16 inch print?
At 150 DPI a 12 by 16 inch print needs 1,800 × 2,400 pixels. At 300 DPI it needs 3,600 × 4,800 pixels. Multiply each side in inches by the DPI you need.
How do I find the DPI of my image?
For printing, DPI is the image width in pixels divided by the printed width in inches, so the same file has a different DPI at every size. The DPI number stored in the file is only a label. Choose your file above or type its pixel width to see the real value at your print size.
Can I increase the DPI of an image?
Changing the DPI setting in an editor only rewrites that label. Resizing an image to more pixels makes a larger file, but the software invents the new pixels, so fine detail still looks soft. The reliable fixes are to print smaller or export a larger original from your design file.
What is the difference between DPI and PPI?
PPI means pixels per inch in an image at a given size, and DPI strictly means ink dots per inch from a printer. Print suppliers usually say DPI when they mean pixels per inch at the printed size, and this calculator uses DPI in that sense.
Is my artwork uploaded anywhere?
No. The file is read by your browser to measure its pixels and draw the preview, and it never leaves this page. The preview is released when you remove the image, press Reset or leave the page.
