• - Fabric
  • - Lining
  • - Thread
  • - Heading Tape
  • - Weights
  • - Curtain Hooks
  • Tools
  • - Sewing Machine
  • - Needles
  • - Pins
  • - Clamps
  • - Scissors
  • - Set Square
  • - Straight Edge
  • - Invisible Marker
  • - Tape Measure
  • Step 4: Calculate Lining Quantity
    Printable Worksheet
    Printable Worksheet

    The calculation for the amount of lining required to make a pair of curtains is the same as the calculation for plain fabric, except when calculating the cut drop the heading allowance will be 5cm and the hem allowance will be 16cm for floor length curtains and 12cm for sill length curtains.

    * Note


    To calculate the Lining Cut Drop:

    * We also add a 5cm trimming allowance to enable us to straighten the ends of the cut lengths


    To calculate the amount of lining required to make a pair of curtains:

    • Multiply the "Number of fabric widths" by Lining Cut Drop

    Alternatively try our online calculator.

    Questions & Comments


    Ihave 11 metres of fabric for my cbedroom curtains with gathered heading. How much lining do I require. Many thanks


    We've written a section of the tutorial teaching you how to calculate your lining qty. We have also made a FREE fabric and lining calculator to help you calculate lining  and fabric amounts.

    Yvonne B

    Just to I am a new curtain maker and was really looking forward to making my spare bedroom curtains with the help of your the tutorials.

    However I have just made a terrible mistake. Even though I have bought my material and lining based on my own calculations of the window, curtain pole and length I wanted for the curtains, I thought I would follow your instructions on how to do it properly and check I id have the enough material. This took me a couple of hours to do the calculations, however, I found that I had plenty of material .... so I went ahead and cut the material for each curtain.

    As I don' have a very big table I folded the material in half length ways and measured the length I needed and cut required length for each curtain from the opening at the bottom of the material. This has meant that I know have the material for 1 width of each curtain and 2 separate pieces which are not long enough to make the half width I need to add to each of the full widths of the curtain material to make 1.5 widths.

    I wish I'd have had a tip to remind me that I need to cut each curtain length individually to ensure I had the 3 pieces I need to make up the required

    1.5 width per curtain.

    Have I missed something on your tutorials?

    Just don't want anyone else to make this silly mistake.


    Dear Yvonne

    I am really sorry that you have encountered a problem so early on in the process.Cutting fabric panels too short is a mistake that you may well struggle to come back from (I have made this mistake before and had to scrap the fabric and rebuy).So, here are the options…

    - Cut all panels to the same length and have a tiny hem 

    - Find a complimentary plain and add a contrast border along the bottom (preferred option)

    - Scrap the shorter panels and buy again

    If I was making these curtains for a customer then I would scrap and buy again (make sure batches match). However, I appreciate that these are for yourself and scrapping fabric will not be your preferred option. In that case I would buy a complimentary plain fabric of a similar weight/content and add a border along the bottom.

    Making them with a tiny hem would feel like a bodge to me and I wouldn’t be happy with the finish but this will be down to your personal feelings.

    Good luck and let us know how you got on!



    I am attempting to make a pair of pencil pleat curtains. Using your calculation the individual curtain width should be 202 cms. My material width is 200cm and my lining width is 140cm. I would like the curtains to be very full. How many widths of each of the lining and material would you recommend per curtain?

    Thank you for your fantastic tutorials.


    To make full curtains we use a fullness ratio of 2.5. If the finished (pleated) curtain width is 202cm and your fabric is 200cm wide we would use 2.5 widths of fabric. That gives you approx 500cm width of fabric to make the 202cm wide curtain. You will need 3.5 widths of your 140cm lining which will give you approximately 490cm to make the lining panel. You will obviously have to trim the width of your made up fabric or lining panel so they are the right size relative to each other (See Step 7)

    Alka Ahya

    Can lining be used in the opposite direction? If so would there be any issues with the finish of the curtains. Could this be the cause of the lining puffing out?


    The linings we work with can be used either way. We don't understand what you mean by lining puffing out.


    With blackout lining, do you have the woven side facing the street, or the soft felty side? Also is there a reason for having such a large hem allowance for the lining? I was planning on a 1 inch hem folded over (2" total).


    We're not sure what type of blackout lining you have. With a combined blackout interlining we would have the felty interliner facing inside the curtain towards the fabric. With a normal blackout lining we would make with the rubbery side of the blackout lining facing inside the curtain towards the fabric.

    You can make the hems whatever size you like. We make them the size in the tutorials because over the years we have found these hem sizes to be best for making the curtain hang well and look more professional.


    My lining fabric is 45inch width and curtain fabric is 60inch width.Do I add the extra required to the lining?


    Your lining panel will need to be 10cm (4 inch) narrower than your fabric panel when you come to join them together in STEP 7.

    When the dfference between the fabric and lining widths is small there is no problem trimming down.

    As the width of your lining  is significantly less than the fabric you are faced with the choice of trimming the fabric down in STEP 7 or having an extra drop of lining in each curtain panel and then trimming the lining down. 

    Reducing the fabric width will reduce your fullness ratio, The more widths you have in each curtain the bigger the difference between the fabric and lining will be.

    You wont go wrong by adding an extra lining drop to each curtain, then you will keep all your fabric and not risk reducing the fullness ratio too much.

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