How large can I print my photo? A practical sizing workflow
Work from your original pixels to a realistic print size, then account for cropping, viewing distance and the file you actually send.
Read articleGeometry tools
Aspect Ratio Calculator
Reduce a pixel pair to its aspect ratio, then calculate a new width or height while keeping the original proportions.
Your dimensions
On your deviceExample result
1,280 × 720 pixels
Original ratio 16:9 · scale 66.67%
- Original dimensions
- 1,920 × 1,080 px
- Resulting ratio
- 16:9
- Ratio difference
- 0%
The width is fixed at 1,280 pixels. The other dimension rounds to the nearest whole pixel.
A resize changes the whole image’s dimensions. A crop removes content. This calculator only supplies the dimensions.
Calculation details & inputs
| Original width | 1920 px |
|---|---|
| Original height | 1080 px |
| Set a new | Width |
| New constrained dimension | 1280 px |
| New width (px) | 1,280 |
|---|---|
| New height (px) | 720 |
| Exact width (px) | 1,280 |
| Exact height (px) | 720 |
| Scale (%) | 66.666667 |
| Ratio difference from rounding (%) | 0 |
Behind the numbers
How the calculation works
Scale = new constrained dimension ÷ original dimension. Multiply the other side by that scale.
This calculates dimensions; it does not resize a file. Rounding one side to a whole pixel may slightly change the final ratio.
Results use the numbers you enter. See the methodology for precision, accepted ranges and sharing behavior.
Reference notes
References checked September 28, 2026. Calculations and worked examples are our own.
Useful answers
Common questions
Does this stretch the image?
It calculates a proportional resize and rounds the unconstrained side to a whole pixel. Any tiny change in the resulting ratio is reported. No image file is modified.
Is 1920 × 1080 the same ratio as 1280 × 720?
Yes. Both reduce to 16:9. Their pixel counts differ, but their rectangles have the same proportions.
A practical next read
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