Example
At 1:100, a 10 mm line on paper represents 1 m in reality. Changing the drawing to 1:50 needs 200% print size.
How the scale works
Enter the scale and a measured paper distance to calculate the real length. Choose another scale to see the new drawing length and print enlargement. Compare a list of real distances, export the table, and print a physically dimensioned scale bar.
Frequently asked questions
How do I calculate a 1:100 scale?
Multiply the measured paper length by 100. For example, 10 mm on paper represents 1,000 mm, or 1 m, in reality.
How much should I enlarge a 1:100 drawing to make it 1:50?
Print at 200%. The scale factor is 100 divided by 50. Check the printed 100 mm line because printer settings may resize the page.
Why is the check line included?
It gives you a physical 100 mm reference. If it does not measure 100 mm, the print is not at the intended size.
Can this verify an architectural or survey plan?
No. It performs arithmetic on the scale and measurements you enter. It cannot certify a plan, survey or site measurement.
Printing and accuracy
Print settings, margins and printer hardware can change the final size. Print at Actual size or 100%, turn off Fit to page, and measure the 100 mm check line before relying on a paper plan. This tool does not certify a drawing or survey.