👟 Brand to Brand
Under Armour to Nike Shoe Size Conversion
Switching from Under Armour to Nike? Under Armour runs small and Nike runs small, so the size you order stays the same. Here's the full chart.
Because Under Armour and Nike share the same fit tendency, your size carries straight across: a Under Armour 9.5 is a Nike 9.5.
Under Armour and Nike run the same
Order the same number — a Under Armour 9.5 is a Nike 9.5.
Find your Under Armour size on the left, read across for Nike:
| Under Armour size | Nike size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6.5 | 6.5 | 5.5 | 37 | 23.5 |
| 6.5 | 6.5 | 5.5 | 37.5 | 23.9 |
| 7 | 7 | 6 | 38 | 24.3 |
| 7.5 | 7.5 | 6.5 | 38.5 | 24.7 |
| 8 | 8 | 7 | 39.5 | 25.1 |
| 8 | 8 | 7 | 40 | 25.5 |
| 8.5 | 8.5 | 7.5 | 41 | 25.9 |
| 9 | 9 | 8 | 41.5 | 26.3 |
| 9.5 | 9.5 | 8.5 | 42.5 | 26.7 |
| 10 | 10 | 9 | 43 | 27.1 |
| 10.5 | 10.5 | 9.5 | 43.5 | 27.5 |
| 11 | 11 | 10 | 44 | 27.9 |
| 11.5 | 11.5 | 10.5 | 44.5 | 28.3 |
| 12 | 12 | 11 | 45.5 | 28.7 |
| 12.5 | 12.5 | 11.5 | 46 | 29.1 |
| 13 | 13 | 12 | 47 | 29.5 |
| 13.5 | 13.5 | 12.5 | 47.5 | 29.9 |
| 14 | 14 | 13 | 48 | 30.3 |
| 14 | 14 | 13 | 48.5 | 30.7 |
| 14.5 | 14.5 | 13.5 | 49 | 31.1 |
| 15 | 15 | 14 | 49.5 | 31.5 |
⚠️ Fit varies by model. Under Armour tends to run about half a size small, especially in performance trainers. Nike tends to run about half a size small — most people size up half, and lifestyle models (Air Force 1, Blazer) run especially snug.
Nike to Under Armour → · Under Armour chart · Nike chart · Brand finder
What is a Under Armour 10.5 in Nike?
A Under Armour 10.5 is about a Nike 10.5 — they share a foot length of roughly 27.5 cm (UK 9.5, EU 43.5).
Do Under Armour and Nike fit the same?
Roughly, yes — both run small, so the same number fits.
ⓘ Affiliate links below. As an Amazon Associate we earn from qualifying purchases at no extra cost to you.
Recommended on Amazon
Foot Measuring Device
Measure once, buy any brand with confidence.
View on Amazon →