How to correct a print that is too small
Start with a test print at a known percentage. Measure its width and height, enter the intended dimensions, and calculate each axis separately. If a 100 mm line printed at 100% measures 98 mm, the new scale is 100 × 100 ÷ 98 = approximately 102.04081633%.
Use this formula for either axis: new scale (%) = current scale (%) × intended size ÷ measured size. Use the same unit for intended and measured dimensions.
Why the width and height corrections may differ
If a 100 × 100 mm test measures 98 × 99 mm, the width needs about 102.04081633% while the height needs about 101.01010101%. One uniform percentage cannot make both exact. Check the measurement, paper, print application and printer settings before proceeding.
Frequently asked questions
Does this calibrate my printer automatically?
No. It calculates a suggested percentage from your measurements. Apply the setting yourself and print another test to verify the result.
Is 4 inches the same as 100 mm?
No. Four inches is exactly 101.6 mm. Choose the matching reference and enter its intended length.
Can I fix an image stretched differently on each axis?
A single uniform print percentage cannot fix unequal axis ratios. This tool shows separate corrections and predicts the other axis when you select one correction.
Why did the downloaded SVG print at the wrong size?
The application or print dialog may apply Fit to page, margins or another scale. Use a program that respects SVG physical units, print at Actual Size / 100%, and verify the paper result with a ruler.
Are my measurements uploaded?
No. Calculations and reference generation run in your browser.