Caleb MorganBy Caleb Morgan

Updated November 2026

Most standard garden hose fittings are 3/4-inch Garden Hose Thread (GHT), and that single measurement covers the majority of spigots, nozzles and couplings sold in the United States. This guide shows you how to confirm the size of your own fitting, how to tell it apart from similar-looking threads, and what to buy when you need a replacement that will actually fit.

Understanding the Standard Garden Hose Size

The 3/4-inch measurement refers to the approximate inside diameter of the hose and the thread diameter of the fitting, not the outside dimension of the metal ring. Garden Hose Thread uses a specific pitch of 11.5 threads per inch, which is why a fitting that looks close can still refuse to screw on. Manufacturers that follow the GHT standard produce couplings and nozzles that interchange freely, so once you know the thread is GHT, most parts from different brands will work together.

Shopping for one? See our guide: Replace End of Garden Hose: 6 Best Repair Fittings Compared (2026).

How to Measure Your Garden Hose Fitting

Measuring takes about two minutes and needs only a ruler or tape measure. Start by checking whether the fitting is a female coupling (with internal threads) or a male end (with external threads). Then measure the outside diameter of the threaded portion, not the hose itself.

  1. Remove the fitting from the hose or spigot if possible.
  2. Measure across the outside of the threads at their widest point.
  3. Compare that reading to the reference table below.
  4. Count the threads per inch with a ruler if the measurement falls between two sizes.
Fitting Type Typical Size Thread Standard
Standard garden hose end 3/4 inch GHT, 11.5 threads per inch
Standard outdoor spigot 3/4 inch GHT
Some pressure washer fittings 22 mm (approx. 7/8 inch) Metric, not GHT
Some European hose connectors 1/2 or 3/4 inch BSP or similar

Checking Whether a Fitting Is GHT or Something Else

Thread shape matters as much as diameter. GHT threads are flat-crested and coarse, so a GHT fitting usually feels smoother and more blunt when you run your thumb along it. Pipe threads (NPT) taper, and they will not seat properly on a GHT coupling even if the diameter looks correct. If a fitting goes on partway and then stops or cross-threads, it is likely a different standard, and forcing it will damage both pieces.

Quick checks before buying a replacement

  • Confirm whether your spigot is threaded for a hose or for pipe.
  • Look for stamped markings such as “GHT” or “Garden Hose” on the part.
  • Bring the old fitting to the store, or take a clear photo with a ruler beside it.

Choosing Replacement Parts That Match

When you buy a repair end, a nozzle or an adapter, check that it states GHT or 3/4-inch compatibility on the packaging or listing. If you have a mixed system with pipe-threaded spigots, an adapter will bridge the gap, but expect a small loss of flow. For a broader look at repair options, see Replacement Garden Hose Ends: 7 Best Repair Fittings Compared (2026) and Garden Hose to Pipe Fittings: A Step-by-Step Guide to Connecting Them Right.

Common Mistakes to Avoid

  • Measuring the hose diameter instead of the fitting thread.
  • Assuming all “garden” fittings are 3/4 inch, especially pressure washer connections.
  • Forcing a pipe-threaded fitting onto a GHT coupling.
  • Skipping a washer, which can cause leaks even with a correct size match.
  • Buying a replacement without checking whether it is male or female.

A clear, rigid tape measure helps you read thread diameter accurately, especially when a fitting sits at an awkward angle. Rubber hose washers are inexpensive and worth keeping on hand because they seal the joint at every connection. View on Amazon

A set of replacement rubber washers in common sizes lets you fix a leak without replacing the whole coupling. View on Amazon

FAQ

What size is a garden hose fitting in the United States?

Most standard garden hose fittings in the US are 3/4 inch GHT. This applies to both the hose ends and most outdoor spigots.

How can I tell if my fitting is GHT?

Check for the GHT marking on the part and confirm the threads are coarse and flat-crested. If the fitting matches the diameter but still will not seat, it may be a different thread standard.

Will a 3/4 inch nozzle fit a pressure washer hose?

Often not. Many pressure washer connections use metric or different threads, so check the specifications on both parts before buying.

Conclusion

For nearly all household hoses and spigots, the answer is a 3/4-inch GHT fitting. Measure the thread diameter, confirm the thread shape, and check for matching markings before you buy. Doing this once saves you from returns and leaks later.

Ready to choose one?

Caleb Morgan

About Caleb Morgan

Caleb Morgan is part of our editorial team and reviews and edits our garden hand tools & equipment guides, checking product details against manufacturer specifications and owner feedback.