Enlargement & Scale Calculator
Resize a design without distorting it. Enter the original size and a target width or height to get the matching dimension and the scale percentage.
Enter the original size and a target dimension.
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Enlargement & scaling FAQ
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Keep the same width-to-height ratio. Enter your original size, choose whether you are setting a new width or height, and the calculator gives the matching dimension and the scale percentage.
It can. Vector art scales cleanly, but a photo or raster image loses effective resolution as it grows. After scaling, check the new size in our image resolution checker to be sure it still prints sharp.
No — scaling is proportional, so the percentage is the same in inches, feet, or centimeters. We labeled the fields in inches for convenience.
How to calculate an enlargement scale percentage
The rule of thumb: to enlarge or reduce artwork without stretching it, both sides have to change by the same factor. You never scale width and height separately — you find one number and apply it to everything. That single number is your scale factor, and it’s what keeps a design looking right at any size.
The math is one division. Take the new dimension you want and divide it by the matching original dimension — the calculator uses your target width by default, or the height if you switch it. That answer is the scale factor; multiply the other original dimension by it to get the missing measurement, and multiply by 100 for the scale percentage you’d type into design software or hand to a printer.
Worked example: a 24" × 36" poster needs to be 48" wide. Divide 48 by 24 for a scale factor of 2 — that’s 200%. The height follows along: 36 × 2 = 72", so the finished piece is 48" × 72" at 200%. One caution — enlarging a photo lowers its effective resolution, so run the new size through our image resolution checker before it goes to print.
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