Shoe Size Converter

Convert men's and women's shoe sizes between US, UK, and EU sizing, or use your foot length to estimate your size.

Your inputs stay in your browser. Selections and measurements are never uploaded.

Convert your shoe size

Choose the size you know. Results use an adult reference chart and appear in all other supported systems.

Sizes vary by brand. This converter uses a popular adult reference chart based primarily on New Balance sizing. Results are approximate, not universal. Check the shoe manufacturer's chart before buying.
cm

Adult sizes only. Half sizes are included where the reference table supports them.

How to measure your foot

  1. Place paper on a hard, flat floor with one edge against a wall.
  2. Wear the socks you normally use with this type of shoe.
  3. Stand on the paper with your heel lightly against the wall.
  4. Mark the end of your longest toe, which may not be your big toe.
  5. Measure from the wall-side edge to the mark.
  6. Measure both feet and use the longer measurement.

Measure while standing. Enter the actual heel-to-longest-toe length; do not add extra room.

Approximate conversion

Approximate equivalents

Shoe sizes can vary by brand and style. These conversions are approximate. Check the manufacturer's size chart when an exact fit is important.

US, UK, and EU shoe size conversion

This converter gives a practical adult equivalent without pretending that every brand uses the same mapping. Buying a unisex shoe? Many unisex styles use men's sizing, so the US men's and women's results can help you compare the two scales.

How the reference works

Each result comes from one normalized row containing US men's, US women's, UK, EU, and foot-length values. Conversions are not chained from one system to another. If a measurement falls between rows, the result shows the two neighboring sizes instead of claiming an exact match.

New Balance's current men's/unisex chart is the primary structured reference. It was compared with current adidas and Nike charts; their EU and foot-length mappings sometimes differ, which is why this is a generic approximate converter rather than an official chart for any brand.

Sources & sizing notes

Official charts and guidance consulted August 16, 2026: New Balance Size & Width Guide, adidas men's shoe size chart, Nike men's footwear size chart, Nike women's footwear size chart, and Clarks measuring guidance. One inch equals exactly 2.54 centimeters.

Frequently Asked Questions

No. They use different sizing systems and normally require conversion. For example, select the US or UK size you know to see its approximate counterpart.

No. US men's and women's sizes use different scales. A direct conversion is especially useful for sneakers and unisex shoes listed in men's sizing.

No. Sizing can vary by manufacturer and even by style within one brand. The converter provides a practical approximate equivalent.

Brands do not always map US, UK, and EU sizes identically. Small differences between reputable charts are normal, so check the chart for the shoe you plan to buy.

Stand on paper on a hard floor, place your heel at the wall, mark your longest toe, and measure the distance. Measure both feet and use the larger measurement. See the full instructions above.

Yes. Official fitting guidance commonly recommends measuring both feet and choosing based on the larger foot when they differ.

Not always. Some manufacturers distinguish actual foot length from the CM sizing number on a label. This calculator expects your actual heel-to-longest-toe foot length.

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