Roman Blind Fabric Calculator

USE THIS TO CALCULATE

Fabric, Lining, Interlining, Rod Pocket Tape required to make your roman blind

Roman Blind Fabric & Lining Calculator

MEASURE:

SELECT:

RESULTS:

WHAT YOU NEED TO KNOW IF YOU ARE MAKING:

FABRIC:

PLAIN FABRIC:

PATTERNED FABRIC:

LINING:

TRIMMING ALLOWNACES PER DROP:

Calculator Assumptions

  • Lined or Interlined Roman blind
  • 5cm trimming allowance on lining cut drops
  • 5cm trimming allowance on plain fabric cut drops (note not included for pattern fabrics as adjusted cut drops are usually longer than required)
  • Results are rounded up to nearest 10cm (0.1m)
  • This Roman blind fabric calculator is based on making blinds using the heading and hem allowances in our online tutorials. Full written explainations of the calculations the calculator is based on are given in the tutorials on this website.



    Number of rods pockets?

    To decide how many rods you need and the spacing on your blind please use our Roman blind pleat calculator. There is also guidance in STEP 2 of our Roman Blind tutorials.



    Making your own Roman Blind?

    Find full FREE written instructions and your questions answered here in our online tutorials.

Extra Help & Comments

A Griffin
I am about to make 3 roman blinds with a fabric that has a half drop pattern rpt of 60.5cm. I need them to all match, at the top, and wondered how to calculate the amount of fabric I need ?
Thanks
Sew Helpful
There is a mini tutorial about half drop pattern repeats on the website. This is not a simple question as it depends on whether the blinds are  all the same length or dfferent.
Rebecca Butt
Ive used your roman blind fabric and lining calculator and i assume this will just make one blind and i will need to double it for two blinds?
Rebecca Butt
Ive used your roman blind fabric and lining calculator and i assume this will just make one blind and i will need to double it for two blinds?
Linda McCarthy
My blind is 245 cm wide and 221 down - can I make a blind that wide and do I add extra cord to the pull up to allow for the blind to come up evenly to disburse the weight? What should the maximum width of a blind?
Sew Helpful
You can make blinds that wide, but the bigger the blind the harder it is to make well. They are really best for smaller windows. With large blinds it is more difficult to get it square and avoid sagging. Something that big will probably need a geared mechanism to pull it up. The appropraite number of cords will be supplied with the mechanism.
Sarah Lang
I'm looking at making a blind with 120cm drop and 208cm width in a geometric patterned fabric that is 137 wide. I'm looking at putting the fabric horizontally. How do I calculate the amount of fabric on this calculator?
Sew Helpful

The calculator is based on doing it the normal way, so wont be much help. 

STEP 3 of the roman blind tutorials explains how much fabric you need.

Cut Width = finished blind width + 10cm (5cm turning allowance for each side).
Fabric Cut Drop  = Finished Blind Length + 5cm heading allwnce + 9cm hem allwnce

By railroading (using your fabric sideways you will only need one width):
Your cut drop needs to fit into the width of your fabric which you say is 137cm (you also need to be happy your pattern position will be ok on the blind)-  With your figures you would be left with 3cm for trimming.

The length of fabric you need is now the cut width plus what you think you need to position the pattern horizontally on the blind. (we would also add a 5cm trimming allowance)


Jackie Tazzyman
Hi I'm making one blind that is 160 wide x 134 drop and another one that will be 70 wide and 134 drop. The fabric I've seen is 150 wide with no pattern repeat. How much fabric should I get?
Sew Helpful
There are full details of how to calculate quantities in the roman Blind tutorials. You will be able to get away with 2 cut drops. One for the mid section of the wide Blind and the other to make the smaller blind (cut the fabric from the centre) and the off cuts from each side to provide the side panels for the wide Blind.

You must cut the smaller Blind from the centre so the 2 offcuts have a selvedoes on them to join to the selvedges of the  centre panel of the wide Blind.
Amrit Saggu-Assi
I've made roman blinds and am now trying something more challenging. A blind 135cm wide with velvet surround of 10cm, but I can't figure out how to get the corners to have a mitre appearance whilst still being able to give the reverse side a clean finish. Help!
Sew Helpful
Im sorry we dont have the time at the moment to write and film a mini tutorial for this.
Amrit Saggu-Assi
I've made roman blinds and am now trying something more challenging. A blind 135cm wide with velvet surround of 10cm, but I can't figure out how to get the corners to have a mitre appearance whilst still being able to give the reverse side a clean finish. Help!
Ros
How do I work out the distance between the rod pockets on the lining? The finished length of the blind is 193cm
Sew Helpful
Read the Roman blind tutorials STEP 2. There are also online calclators on the site to help.
J Leslie
I am making an interlined roman bind with patterned fabric repeat of 48. Finished measurements are 210w x 150d. I used your online calculator which gave me 4.4 mts of fabric and your Adjusted Cut Drop calculator which resulted in 3.36 mts to which I added 16 cms x 2 for headings/bottoms = 3.68 mts. Previously my own calculation resulted in 3.7 mts rounded to 4. I've added 1 pattern repeat but wonder if I need to add 2 pattern repeats because of having to make 3 panels as the blind is so wide? Any help would be much appreciated. BTW your tutorials are priceless.
Sew Helpful
You dont add heading and hem allowances after. The adjusted cut drop MUST include these allowances. (with and adjusted cut drop you are effectively working out the length of fabric you need to cut to make the blind, then round that length up to a whole number of pattern repeats so the panels match after cutting.)

You only need to add one pattern repeat to place the pattern, because all the drops will be the same once cut.

You dont need 3 drops, you split the second in half and join to each side. 

I cant see where you get 3.36m from???? The calculator shows an ACD of 192cm (4 pattern repeats). 2 drops  is 384cm. Then add 1 pattern repeat 48cm you get 432cm. rounded up to the nearest 10cm is 4.4m

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