Next, we need to know the width of the fabric. Covering an inch window will take two widths of the fabric. Taking the length of 90 inches and multiplying it by 2, gives us inches. This is equal to 15 feet, or 5 yards. In this example, curtains for a window 84 inches wide would need 5 yards of fabric. If we change the drop of the curtains to 84 inches, this changes the yardage needed. Adding 12 inches for hems and a header gives us 96 inches.
We know the window is 84 inches wide and we need 2 widths of fabric to cover it. Our new calculation is 96 multiplied by 2 which equals inches, or 16 feet. In yards it comes out as 5.
Rounding up to the next whole yard means these curtains would need 6 yards of fabric. For this example, the window is 96 inches wide with a drop of 54 inches. Our first step is multiplying the width of 96 by 2. Fullness for curtains should be at least double the width of the window. Going 2. Including fullness, the Curtains need to be inches wide.
When calculating the drop of the curtains, there needs to be extra fabric for hems and a header. If we go for a 6-inch hem and 6-inch header and add this to the drop of 54 inches, the new length is 66 inches.
We calculated curtain fabric to be inches wide. If we divide that by 60, it comes to 4. We need 4 widths of the fabric. Multiplying the drop of 66 inches by 4 widths of fabric gives inches.
Converting this to feet is 22 feet. This is equal to 7. Allowing an extra 12 inches for header and hems, the new drop is inches. If we divide by 60, the result is 2. Multiplying the drop of by 2 is inches. The result is 18 feet or 6 yards. These curtains will need 6 yards of fabric. The window for this example is inches wide, including an allowance for fullness. The drop is 54 inches with an extra 12 inches needed for hems and a header.
This gives us a new drop of 66 inches. Using a fabric inches wide means we only need to buy one width of the material. Multiplying the drop of 66 inches by the number of fabric widths gives us 66 inches. This equals 5. Rounding up to the next full yard means these curtains require 2 yards of fabric. Adding a inch allowance for hems and a header to a drop of , gives us a new curtain length of inches. When we multiply the window width by 2. To span a window of this size will take more than one width of a inch wide fabric.
Dividing by 60 gives a result of 4. The length of inches multiplied by 5 widths of fabric, gives inches. These curtains will need 17 yards of fabric. Measuring fabric for curtains involves a lot of calculations.
You need to know the width, length, and the amount of extra fabric needed for fullness, header, hems, and seams. The curtain fabric calculator included in this article will handle the math for you.
Making sure you get the right amount of material for your project. For curtain tracks, measure from the top of the track to the floor, for the final drop. For the width, measure the working length of the track, including any overlaps. Finished width cm Finished drop cm x 2.
Again, study the window carefully and try to imagine how the Roman blind will look when it is open and closed. The important point to remember with Roman blinds is that they will need more space at the top as they pleat rather than roll up. A Roman blind sited above the window frame will make the window look longer. If the blind is to sit within a recess, you will lose some light because of the stack back. Roman blinds are fitted to the wall or recess using a covered wooden batten.
This can be fitted in advance. Make the batten 1cm shorter than the finished width of your intended blind. NOTE: Our curtain fabric calculator will automatically add 8 inches 20 cms to each drop of fabric for hem allowances.
Centimetres Inches. Now enter the required values by clicking in the boxes below. Once you have entered all the values click on the 'Calculate' button. Pencil pleat requires 2. Possibly consider 2 x fullness hand double pleat and work out pleat and space sizes in advance, trimming down the panels to the required width. Whether or not you line the curtains is a personal choice but I would recommend that you do.
Your tutorials and online calculators are incredibly helpful, but I am worried about the effect a chosen fullness ratio is having on the "actual fullness ratio" in the calculator given that you say going above 2.
I have a pole width of cm, Fin. Length of I wonder whether this is really too much, but with my measurements, it isn't until I go down to a fullness ratio of 1. I know it's down to personal choice in the end, but I don't understand why inputting various fullness ratios in the calculator doesn't alter the "actual".
Any advice would be very welcome. Hi Caroline. So with a curtain pole width of cm, a 2. In my opinion, going down to 1. I have learnt that pencil pleat header works best with a 2. So you have a couple of options…. The left over could be used for cushions.
You could double pleat but even then, the fullness ratio is at the bare minimum of what I would recommend. Your calculator is very good what heading should I use for curtains that are gathered or box pleat. Firstly to say how appreciative I am of your site with all of the useful guidance and tips - just excellent.
It's a long time since I have made curtains and am having a mind muddle moment. When it comes to the calculations allowing for pattern repeat. If you have two windows in one room and using same fabric on each, do you need to allow for the pattern repeat on each pair - so allow for two pattern repeats - or one or even more?
The windows are quite close, so would ideally need the pattern to be starting at the same point too at the header. Many thanks in advance. If you are placing the pattern in the same position on the second pair you will not need an extra pattern repeat for placing the pattern because the cut line will be in the right position when you start to cut those drops after cutting the drops for the first curtain.
This is the case even if your Adjusted Cut Drop ACD is different on the second pair second pair is a different length , because the ACD is a number of whole pattern repeats, so will always start and end at the same place in the pattern. If you are placing the pattern in a different position on the second pair you will need to add an extra pattern repeat calculating the qty for the second pair to allow for this.
I'm sorry the calculator only does cm at the moment. We are metric, if you were working in inches would you expect the fractions less than one inch to be shown in decimal format eg 0.
Thank you for this tutorial. I'm confused on the 'ratio' if you can help please. If a ratio is say I don't know what it refers to. That means your flat curtain panel is 2.
The fullness ratio effectively determines how full your curtains are going to be. There is information on this in our curtain making tutorials. Love the fact that the calculator dumps what I've already entered if I click on the info buttons.
Basically, I'll never get to the end Thanks for the feedback the page was initially designed for desktop and the info pops up when you hover over it. You dont get a hover with a touch screen it just clicks we should have thought about that. We will remove those very shortly and add an expaliner video instead. I need your assistance to calculate how much material I need to buy for 60 rooms 2 curtains per room. We would use 5 widths. We will be adding advanced instructions shortly explaining how you cut panels to the width you need to get and exact fullness ratio which also leads on how to pleat to pattern repeat.
HI - Wonder if you can help, when I calculate the dimensions using the instructions on step 3, I get 4 widths of fabric. It means "Not a Number". This is caused when you don't enter numbers only into the entry fields or enter non sensical numbers.
Thank you very much Cindy for that advise. Still learning so don't really understand all of it, but have to say i'm panicking now reading it all, due to telling my friend 14 metres and being Susie Watson material not cheap.
Won't be cutting it until i feel comfortable and will be doing mock ups first hehe. Could you tell me please if i've got the calculations correct? I'm not sure if the fabric calculator includes the overlap and ease within the calculations, or if i have to add it onto the pole length? The calculations i have put in are only the pole length, so therefore,.
With one pattern repeat added and rounded up, i get it to 14 meters, but not sure if this is wrong due to me not adding the overlap and ease 20cm total to the pole length. Hi Sharon. Your question is a really interesting one as you are right on the cusp of the 5th width. Based on double pleat. As you are on the cusp of the 5th width, here are a few things to consider when deciding to go into the next width or not….
It may not sound a lot but manoeuvring the extra fabric, lining and interlining gets tricker with every cm, particularly if you do not have a suitable space to make them on such as a worktable.
Having a quick look at your measurements, here are the options…. Then machine stitch closed. This will take 4 cm off your panel width. This now gives you a pleated width of cm and leaving you cm to pleat - just under the 2 x fullness. When deciding which is the best option, I would consider the factors mentioned above before you make your decision. Is it worth going into the extra width for such a small amount of fabric that would end up in a a lot more work, fabric, lining, interlining for the sake of either 2 cm on each pleat or minus 1 cm on each space?
In the workroom, I make this kind of decision in conjunction with my customer. With a really expensive fabric, the added increase in cost is definitely something to consider. Good luck and I hope that this fully explains the options. Kind regards. Hi I am working with the frame of the window and not the track width as the room is still being renovated. How can I make allowance or how much do I add off the frame for the curtain pull back?
If it is a really wide window with thick curtains you may need more. My calculations have come out with the exact same figure for the adjusted cut drop as cut drop. That feels a bit too good to be true. Does that sometimes happen? Curtain finished length is cm; pattern repeat is 53, so exactly 6 repeats! That means there won't be a trimming allowance - is that OK? Of course that can happen. We would probably not add the trimming allowance as you will have to add an extra 53cm to each drop.
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