Origami Paper Size Calculator
Enter the model-to-paper ratio and target model size to calculate the required square paper edge.
A QUICK WALKTHROUGH
How to use this tool
- Enter a positive model-to-paper ratio.
- Enter the target model size and choose a unit label.
- Calculate the square paper edge and review the formula.
Clear formula
Required paper edge = target model size ÷ model-to-paper ratio. The ratio must be greater than zero.
Unit label follows your input
The calculator carries the target size unit label into the result; it does not convert between units.
Calculation boundary
This is a sizing formula only. It does not provide an origami design, fold sequence, paper material, or engineering specification.
GOOD TO KNOW
Common questions
What does the ratio mean?
Use model size divided by paper edge, such as 0.25 when the model is one quarter of the paper edge.
Does it convert centimetres and inches?
No. Enter one unit consistently; the result uses the same unit label.
Does it recommend paper?
No. It calculates size only.