EU to AU Shoe Size for Unisex
40 EU size = 6.5 AU size ยท cohort-based size mapping for selected cohort
Direct Answer
40 EU size equals 6.5 AU size
This result uses the selected selected cohort cohort as the profile basis.
For 37 EU size, the selected cohort cohort returns 4 AU size under the same mapping assumptions.
Converter Calculator
6.5 AU size
SwitchExplanation
EU converts to AU by first mapping EU to millimeters, then mapping millimeters to AU. Cohort profile fixed: Unisex.
From EU size to AU size, results depend on the selected selected cohort cohort and stay consistent with that cohort across table rows and calculator input.
Keep the same cohort in both directions to avoid mixing shoe-size systems that use different wearer-group mappings.
Common Conversion Values
| EU size | AU size |
|---|---|
| 37 | 4 |
| 39 | 5.5 |
| 40 | 6.5 |
| 42 | 8 |
| 43 | 9 |
Frequently Asked Questions
How can I convert back from AU size to EU size?
Use the mirror AU size to EU size route; it applies the inverse relationship for the opposite direction with the same assumptions.
Does this page use cohort-specific mapping?
Yes. This page is fixed to Unisex.
What formula is used for EU size to AU size?
The converter applies the formula defined for EU size to AU size, then renders rounded output for the direct answer and common-value rows.