Roman Blind Fabric Calculator


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

Roman Blind Fabric & Lining Calculator










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 ?
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)

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