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The Perfect Lacing Length Calculator

Earlier this year, I worked on a new calculator to determine the ideal length of lacing anyone needs for their corset, and I shared it on Patreon but I completely forgot to share it here on my site once it was beta tested!

It looks extremely simple, and I’m hoping that ends up being a good thing for most. Do keep in mind however that this is an estimation – it’s not going to take into account teensy details like whether the grommets are closer at the waistline. That would be overkill for only negligible differences in the total lacing length. It’s just laces folks!

The calculator takes both centimeters and inches for your natural waist size and the corset size, and it will give you the total length lacing answer in both yards and meters.

I will eventually update this post with a video tutorial, but if you’d like to try the calculator for yourself, I’d love some feedback on it! If you don’t trust the calculator and you’d prefer to calculate your own length, then below the calculator I will post a step-by-step guide on how to determine for yourself how much lacing you need for your own corset and individual situation. :) But the calculator is designed to work whether you own the corset yet or not – in other words, if you’re trying to decide whether you need to purchase extra laces along with your new corset, this is a good way to test it before checking out.

Remember: this formula should theoretically work for any corset brand!

How to calculate the ideal length of lacing without my calculator:

(If you want me to “show my work” so to speak and break down how the calculator works)

Step 1: take your corset and expand the back enough that you’re able to do up the busk easily (if you’re struggling with the busk, the laces are too short). Don’t tighten the laces – just remove your corset and lie it flat, so that the laces are still extended to the ideal amount.

(The first step is important: don’t just take your corset off at the end of the day and measure the laces then. The point of Step 1 is to make sure you have a measurement of the lacing gap when you’re putting the corset on at the beginning of the day, not when you’re taking the corset off. Because the waistline is marginally smaller after several hours of waist training, it might take you 6 inches of slack to comfortably put the corset on, but only 4 inches to take the corset off, so be mindful of this difference.)

Step 2: take a tape measure and measure how wide the lacing gap is at the widest point – you want to measure from grommet to grommet (the holes that the laces are threaded through), instead of back edge to back edge of the corset.

Example: say your corset is 10 inches wide from edge to edge; it’s probably closer to 12 inches wide from the grommets on the left side to the grommets on the right side since you’re going over the bone and the fabric, to the middle of the hole.

Step 3: multiply that by the number of grommets in the corset.

Really we’re using the number of grommets as a substitute for the # of times the lacing criss-crosses the back. For the most common lacing methods without any tricky business, the number of grommets always matches the number of times the laces criss cross along the back but it’s easier to count grommets than it is to count a mess of laces. Don’t take my word for it, you can count it yourself!

Example: For the Gemini, it has 28 grommets, 14 on each side. You’ll see the laces criss-cross 28 times from one side of the corset to the other. Counting the Xs, there are seven on the outside the corset, meaning it crosses 14 times. On the inside of the corset there are another six Xs, so it crosses 12 times. Plus the very top and very bottom where the lacing runs straight across two single times. 

So a 12 inch wide lacing gap x 28 criss-crosses across the back = 336 inches

Step 4: we’re not done yet – it’s good to have a little extra more, just in case. Do you see how each criss-cross, or “X” is on an angle, the laces are not going straight across? Remember back to trigonometry in school where you were made to find the hypotenuse of a triangle, the hypotenuse is always going to be a little longer than the base. When it comes to a triangle as squat as this, the difference is quite small, but when you add them up with 28 different triangles, all those little bits can add up!

But let’s not make it too tedious – let’s fudge the answer for the sake of simplicity and add the length of the back of the corset times 2.

Example: The Gemini is 14 inches high at the back, add (14×2 = 28 inches). Adding this to the above, 336 + 28 = 364 inches.

364 inches is about 10.1 yards, or 9.24 (about 9 and ¼ meters).

So, if you need your corset to expand at least 10 inches wide (from edge to edge) to get the corset on and off, that’s about how many inches of lacing you’ll likely need!   When it comes to lacing I will almost always round up to the nearest half meter (because places like Fabricland or JoAnn will often ask for rounded measurements when it comes to lacing and trim). The additional length will to make it even easier to get the corset on and off, and if it’s excessive, I can always trim the lacing back if it’s too much. More than likely though, the extra tiny bit will just go into the bunny ears of the corset so that you can get a good grip on these to tighten your corset.

Remember, this formula should work for any corset brand!

Did this calculator work for you? Let me know in the comments what changes or improvements you’d make.

3 thoughts on “The Perfect Lacing Length Calculator

  1. Are there any changes to this calculation if I want to fan lace my corset?
    I have “sway back” that is getting more unstable as I age. I find that regular corsets give me the same or better results than the bulkier “low back support” I get from my orthopedic surgeon.

    1. Hi Rebekah, thanks for your comment. This is for a standard bi-directional lacing, not fan lacing. Fan lacing is unfortunately a completely different beast!

  2. Wow, this lacing length calculator is a game-changer for anyone who loves corsets! I appreciate the amount of time and effort you put into creating this tool and making it accessible to everyone. The step-by-step instructions and helpful visuals make it easy to understand and use, even for those who are new to corsetry. It’s clear that you’re passionate about helping others achieve the perfect fit and feel comfortable in their corsets. Your website is such a valuable resource for the corset community, and I’m grateful for the wealth of knowledge and expertise you share. Thank you for all that you do!

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