Grommet Quantity for Curtain Calculator

Avoid this mistake: Don’t think that the spacing of curtains is purely an art project, it’s actualy pretty much geometry. You’ve got the rod and the fabric. Now, all the grommets on the top is unevenly placed. Or worse yet, there aren’t any right near the edge, your panels will look lopsided from Day One.

You just have to figure out how wide your window is, how heavy your material is, and what gap is between each metal ring…simple math. If you has an idea of your panels’ size, go ahead and plug it into the calculator at the top of page. It’ll do all the math for you. You don’t want to pay for those extra costs later. Knowing exactly what you are putting in will save you money.

How to Space Curtain Grommets Correctly

Edge Distance (how far away from the raw fabric edge does the first grommet sit?) is typicaly the most important one. When you go to open the curtain and yank it out, the metal ring will tear through your hem if you’ve got a low enough edge distance. Three inches is generally plenty, it will keep hardware protected while still letting the fabric fold nicely onto itself against the wall. People tend to get caught up with the overall count without realizing exactly where their numbers begin/end.

Also important is the diameter of the pole in relation to the inside of the grommet. Too small and each time you open/close the blind the rings will rub along the metal, making a grating sound that wrecks the feel of the space. The tool test this spacing for you so you can be sure whatever hardware you choose will actually fit the existing rod. Just purchasing grommets on aesthetic grounds alone isn’t sufficient, they must work mechanically too!

Another variable in determining the number of grommets (and therefore also the number of panels) is the idea of fullness. One panel per foot of window width just doesn’t look right; it’s too skimpy and cheap looking, while using two or three panels create a luxurius drape. The calculator will let you change the number of planned panels to show how that affects amount of material needed. For instance, if you’re covering a really wide patio door, maybe you’ll want four panels rather then the typical pair, and that will quadruple your grommet need overnight. Large spans can be easy to underestimate.

Then there are the ring parts themselves. They is typically sold in packs of 8-12, depending on which size you’re using. This is where the math happens. You enter the number of rings and it tells you how many pack will be required. A little extra gets added for spares, in case someone drops one down the drain or cracks one installing them. Better to have a few extra laying around than to run to the craft store when you realize you didn’t had enough three weeks into post-curtain-hanging life.

Lastly, make sure there are always an even number of grommets on each panel. Odd numbers will result in having one left in the middle at the bottom of your curtain panels when they’re closed. That makes for some weird folding action and not-so-easy stacking on the rod. With an even number, the bottoms lines up evenly so that you have a nice clean line no matter how open or shut you keep them. That little thing is what separates a do-it-yourself project that looks like an accident, versus one that looked like it was meant to be that way.

How far apart you space it? That’s mostly just personal style preference. Of course, you can’t be too narrow or the fabric will hang in unnatural folds. You also shouldn’t of go so wide that the fabric simply hangs loosely in between the rings. This chart (on the same page) shows it with various panel widths to help you determine roughly where a nice fluid drape occurs without being distorted.

To avoid a headache when re-hanging those heavy drapes (in that tight window frame), measure twice, calculate once. The balance of soft fabric held by the hard metal rings is key. Space them correctly and allow for edge space, that way your windows won’t appear mismatched but polished.