How do I convert Altra shoe size to Brooks?

Match by foot length in centimeters on each brand’s chart. Example: Altra US 10 ≈ Brooks US 10.0 (about 27.2 cm). Model fit can still differ — check model guides.

Is a Altra US 10 the same as a Brooks US 10?

Not always. Labels can map to slightly different foot lengths. Use the cm column, then adjust for the specific model’s fit.

Altra to Brooks size conversion

Match sizes by foot length (cm), then check model fit — US labels alone can mislead across brands.

Chart match · verify brand charts

Check current prices · Lone Peak 8 Check current prices · Ghost 16

(paid link)

Your Altra size (US)

Full converter (model + shoes you own) · Reverse: Brooks → Altra

Altra → Brooks chart

Static conversion table (crawlable). Interactive tool above uses the same cm matching.

Altra US	cm	Brooks US	Brooks EU
6.0	23.6	6.0	38.5
6.5	24.1	6.5	39.0
7.0	24.6	7.0	40.0
7.5	25.1	7.5	40.5
8.0	25.4	8.0	41.0
8.5	25.9	8.5	42.0
9.0	26.2	9.0	42.5
9.5	26.8	9.5	43.0
10.0	27.2	10.0	44.0
10.5	27.6	10.5	44.5
11.0	27.9	11.0	45.0
11.5	28.4	11.5	45.5
12.0	28.9	12.0	46.0
13.0	29.8	13.0	47.5

Model fit matters

Even when charts match, lasts differ. Check these guides:

Altra: Lone Peak 8

Brooks: Ghost 16 · Glycerin 21

Also compare Altra to: Salomon

Check prices: Altra Brooks (paid link)

FAQ

How do I convert Altra shoe size to Brooks?: Match by foot length in centimeters on each brand’s chart. Example: Altra US 10 ≈ Brooks US 10.0 (about 27.2 cm). Then adjust for the specific model’s fit (runs big/small/narrow).
Is a Altra US 10 the same as a Brooks US 10?: Not always. Labels can map to slightly different foot lengths. Use the cm column, then check model guides on both brands.
Which direction should I read first?: Start from the brand you already wear, then open the model fit pages linked below — lasts differ even when charts match.

Clothes sizing uses a separate compare path.