• - 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.

    Extra Help & Comments

    Sew Helpful
    Post your questions and comments here, we will reply so everyone can see the answer.
    Hi, I'm getting myself all confused. I'm making floor length thermal curtains with lining plus interlining. The tutorial I was following says that the lining should be 4cm narrower than the fabric so the lining cannot be seen at front of curtain. The lining material is narrower than my curtain material of which I will need to sew two widths together. I am trying to work out how many widths of lining material I will need, how do I factor in the seam allowance for joining my widths of fabric?
    Sew Helpful
    We cant advise on the methods of other tutorials. You will see in this tutorial we trim the made up fabric or lining panel width in step 7 to get them the right size relative to each other. 
    laura constance
    I am making curtain for a tiny cottage window, drop 120 cm to just below sill. My dilemma is should I use black out fabric as an interlining, I don't really like the look of it when used as lining, or use warm cladding interlining ? will this give a black out effect a si feel it will give a softer more luxury feel curtain ? Or do I use a double interlining ?! i fear wold be too thick ! thank you
    Sew Helpful
    Interlining will not block the light out. If you want blackout you will have to use blackout lining. We have made blackout blinds with a combined blackout/interliner inside and cotton lining on the back, for the reason you say (dont like the look of the blackout lining on the back). This would work for a curtain but is not something we have tried yet.
    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.
    Sew Helpful
    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)
    I have a pair of eyelet curtains 229cm x 229cm. Please could you advise how much lining material I should buy and if I would need to do any joins.

    Many thanks
    Sew Helpful
    Sorry I'm afraid we do not make calculations for people. 
    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?
    Sew Helpful
    The linings we work with can be used either way. We dont understand what you mean by linging 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).
    Sew Helpful
    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?
    Sew Helpful
    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.
    My cut length is 270cm and the width is 147cm. The pattern match is 45cm. I need 2 drops together x 3. How much fabric should I be buying?

    Thank you
    Sew Helpful
    I'm sorry we don't do calculations for people. We have made a curtain fabric calculator on the website that you can cross check your calculation against.

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