UK vs US Laundry Symbols: What's Different?

The biggest difference: temperature notation

Open any garment bought in the UK or the EU and you'll see a wash tub with a number inside it: 30, 40, 60, or 95. These are degree Celsius values — the maximum water temperature for that wash. This notation follows ISO 3758, the international standard authored by the GINETEX labelling body, and it's used across Europe, Australia, Japan, and most of the world.

Open the same garment re-labelled for the US market, and you may instead see a wash tub with dots inside it: one dot for cold, two for warm, three for hot, four for very hot. This follows ASTM D5489 — the American standard maintained by ASTM International and referenced in the US Federal Trade Commission (FTC) Care Labeling Rule, which has legally required garment care instructions since 1971.

Here is a direct conversion between the two systems, including the equivalent machine setting and Fahrenheit reading for US machines:

The key insight: both systems mean the same thing — they're just different visual representations of the same temperatures. A UK "40" label and a US "2-dot" label are giving you identical instructions.

Symbols that exist in the US but not UK/EU

Beyond the temperature notation difference, ASTM D5489 includes some natural drying symbols that differ from or supplement the ISO equivalents. These appear as a square (the dryer/drying base shape) with pictograms inside:

• Drip Dry: A square with three vertical lines descending from a horizontal bar at the top — indicating the garment should be hung wet and allowed to drip dry. The ISO standard uses a similar square with a curved top line, but the US ASTM version with three drip lines is rendered differently.
• Dry Flat: A square with a single horizontal line through the middle — meaning lay the garment flat to dry. Both standards include this, but the visual representation of the line varies slightly by brand.
• Dry in the Shade: Some ASTM symbols add a diagonal line to indicate keeping the garment out of direct sunlight while drying. This is more commonly seen on premium sportswear labels sold in North America.

These natural drying symbols are generally intuitive enough that even unfamiliar readers can decode them. The biggest risk is confusing a "dry flat" square with a "tumble dry" square — always look for the circle inside the square to identify a tumble dryer symbol.

Symbols that exist in UK/EU but not US

ISO 3758 includes several washing cycle variants — particularly around the permanent press (wrinkle-resistant) and synthetic programmes — that ASTM D5489 either does not include or represents differently:

• The 40°C Permanent Press bar variant: In the EU system, a wash tub with "40" and one line beneath it means permanent press at 40°C — reduced agitation to prevent wrinkle setting. US ASTM uses dots for temperature and lines for agitation separately, which achieves the same result but through a different visual grammar.
• Wet cleaning symbol: The ISO standard includes a "W" in a tub symbol to indicate professional wet cleaning (a water-based professional process that differs from home laundering). This symbol is less common on US labels, where dry cleaning instructions typically dominate professional care labels.
• Very gentle wash (2 lines at specific temperatures): ISO 3758 allows for two lines beneath temperature numbers to indicate the most delicate machine programme. ASTM encodes this differently, using a combination of dots and lines.

Which standard does each country follow?

Care label standards are governed nationally, but most countries have converged on one of two main systems:

For a deeper dive into all regional differences — including how Japan's JIS standard adds unique symbols not found anywhere else — see our regional laundry symbols guide.

Practical tips for reading foreign clothing labels

If you're reading a care label from a country that uses a different standard from your own, here's how to handle it confidently:

• 1.Identify the temperature first. If you see a number, convert: 30 = cold, 40 = warm, 60 = hot. If you see dots, count them: 1 = cold, 2 = warm, 3 = hot, 4 = very hot.
• 2.Check for lines. Lines under any symbol mean gentler action, regardless of which country's standard was used. This part is universal.
• 3.Crosses always mean "do not." An X through any symbol — the wash tub, iron, tumble dryer, or dry cleaning circle — universally means do not perform that action. This is consistent across all standards.
• 4.When in doubt, go cooler and gentler. If you can't decode a foreign label with certainty, defaulting to cold water and a delicate cycle protects the garment while you figure it out.
• 5.Use the ISO 3758 standard guide as your reference. Since most countries follow ISO 3758, familiarity with the ISO system means you can read the vast majority of global care labels correctly.