There is no single exact EU-to-UK/US football boot conversion for every brand. Nike, adidas and PUMA use different EU increments, so the safest method is to identify the brand first, convert with that brand’s official chart, and then check heel-to-toe measurement and fit.
Quick answer
- Use the Nike table for Nike boots, adidas table for adidas, and PUMA table for PUMA.
- US numbers below are men’s sizes; women’s and kids’ conversions differ.
- Measure both feet near the end of the day while wearing football socks.
- If a size sits between rows, use centimetres and the exact product fit guidance.
Important: These are adult men’s conversions transcribed from current official brand charts on 19 July 2026. Always recheck the linked chart because brands can revise sizing information.
Nike football boot size converter
| EU | UK | US Men |
|---|---|---|
| 38 | 5 | 5.5 |
| 38.5 | 5.5 | 6 |
| 39 | 6 | 6.5 |
| 40 | 6 | 7 |
| 40.5 | 6.5 | 7.5 |
| 41 | 7 | 8 |
| 42 | 7.5 | 8.5 |
| 42.5 | 8 | 9 |
| 43 | 8.5 | 9.5 |
| 44 | 9 | 10 |
| 44.5 | 9.5 | 10.5 |
| 45 | 10 | 11 |
| 45.5 | 10.5 | 11.5 |
| 46 | 11 | 12 |
Source: official Nike soccer cleats size chart. Notice that Nike EU 39 and EU 40 both map to UK 6 but different US men’s sizes. This is exactly why a simple “subtract 33” formula fails.
adidas football boot size converter
| EU | UK | US Men |
|---|---|---|
| 38 | 5 | 5.5 |
| 38 2/3 | 5.5 | 6 |
| 39 1/3 | 6 | 6.5 |
| 40 | 6.5 | 7 |
| 40 2/3 | 7 | 7.5 |
| 41 1/3 | 7.5 | 8 |
| 42 | 8 | 8.5 |
| 42 2/3 | 8.5 | 9 |
| 43 1/3 | 9 | 9.5 |
| 44 | 9.5 | 10 |
| 44 2/3 | 10 | 10.5 |
| 45 1/3 | 10.5 | 11 |
| 46 | 11 | 11.5 |
| 46 2/3 | 11.5 | 12 |
Source: official adidas footwear size guide. adidas commonly uses one-third and two-third EU steps, so rounding an adidas EU 42 2/3 to another brand’s EU 43 can produce the wrong comparison.
PUMA football boot size converter
| EU/DE | UK | US Men |
|---|---|---|
| 38 | 5 | 6 |
| 38.5 | 5.5 | 6.5 |
| 39 | 6 | 7 |
| 40 | 6.5 | 7.5 |
| 40.5 | 7 | 8 |
| 41 | 7.5 | 8.5 |
| 42 | 8 | 9 |
| 42.5 | 8.5 | 9.5 |
| 43 | 9 | 10 |
| 44 | 9.5 | 10.5 |
| 44.5 | 10 | 11 |
| 45 | 10.5 | 11.5 |
| 46 | 11 | 12 |
Source: official PUMA size guide. PUMA’s men’s chart differs from Nike and adidas at several EU values, even when the UK number appears similar.
How to measure for football boots
- Put on the football socks you normally wear.
- Stand on paper with your heel lightly against a wall.
- Mark the end of the longest toe while your full weight is on the foot.
- Measure heel to mark in millimetres.
- Repeat for the other foot and use the longer measurement.
- Compare that length with the current brand chart and product notes.
Measure near the end of the day because feet can be slightly larger after normal activity. adidas also recommends checking both boots and looking for pressure points under full body weight in its football boot fit guide.
Conversion is only the first step
Two boots labelled the same size can feel different because their lasts, uppers and closures differ. Read How Should Football Boots Fit? and the wide-feet guide. If you switch between speed families, our Mercurial vs F50 comparison explains their different fit profiles.
Frequently asked questions
What is EU 42 in UK football boots?
It depends on the brand. In the current charts above, Nike EU 42 maps to UK 7.5, while adidas EU 42 and PUMA EU 42 map to UK 8. Always use the chart for the exact brand.
What is EU 44 in US men’s football boots?
Nike EU 44 maps to US men’s 10, adidas EU 44 also maps to US men’s 10, while PUMA EU 44 maps to US men’s 10.5 in the current official charts.
Are US soccer cleat sizes the same as normal shoes?
Use the brand’s product-specific chart. The printed number may be similar, but football boots are designed for a snug performance fit and different models can feel narrower or roomier.
Should I size down in football boots?
Recreational players generally should not size down simply for a tighter feel. Choose a snug, comfortable size with no heel lift or toe pain, and do not assume the upper will stretch dramatically.
Final recommendation
Convert with the correct brand table, then confirm the result using foot length and an indoor fit test. Save this football boot size converter for reference, but always recheck the official chart before ordering.
