How it works
Convert a drawing length to actual length at scale 1:n. The output uses the same length unit as the input.
actual = drawing × n
Worked example
Show example inputs and result
Drawing length: 5 · Scale denominator (1:n): 100.
- Actual length
- 500
Questions and answers
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method reviewed: October 8, 2026 · Methods & accuracy