Our Curtain Stacking Calculator

See how much space your curtains will take up when open.

Enter your window width, track width and draw type to estimate where your sheer curtains will stack. This helps you understand how much of your window will be covered when the curtains are open, ensuring it frames the recess without blocking your views or light. It's especially useful when working around things like air conditioners, furniture, doors, or light switches.

Not sure which stack suits your space? Read our guide to choosing the right curtain stack

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Now that you know your curtain stack back, you can choose your preferred curtain style and customise your curtains to suit your space. Shop our range of made-to-measure sheer curtains online.

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DIY Sheers Stacking Guide: How to Plan the Perfect Curtain Stack

When installing DIY sheers, stacking plays a key role in both the look and function of your curtains. It determines how much of your window will be covered when the curtains are open, and where the fabric will sit once stacked to the side.

Understanding curtain stacking is essential when measuring and planning your setup. Well-positioned stacks allow more natural light into your space and ensure your sheers frame the window cleanly, rather than blocking the view.

Stacking is especially important when working around existing features in your home. Consider how your DIY sheers will sit alongside elements like air conditioners, furniture, doors, or light switches. Planning your stack position in advance helps avoid obstructions and ensures smooth operation.

For the best result, allow enough space on either side of your window so the curtains can stack neatly without covering too much glass. This creates a more open, balanced look and maximises the functionality of your DIY sheers.

By factoring in stacking early, you’ll achieve a cleaner finish, better light control, and a more considered overall design.

What is a curtain stack back?

Curtain stack-back is the amount of space your gathered curtain fabric takes up when fully opened. The size of the stack depends on your chosen curtain fabric and style, the track width, and whether the curtains open from the centre or stack to one side.

Should curtains stack outside the window?

Where possible, curtains should stack outside the window opening. This allows natural light to flow in and keeps more of the window or doorway clear when the curtains are open. To do this, extend your track beyond the window on each side by at least the stacking amount shown in the calculator, so your curtains frame the window without covering the glass.

What else should I keep in mind when choosing my curtain stack?

Make sure no physical obstacles are in the way of your curtains when they're fully open. Some common obstacles include couches, side tables, light switches, thermostat controls, and architectural elements like adjacent walls or adjoining doors or windows. Our guide to choosing the right curtain stack has more detail.

How much wall space do I need beside my window?

The amount of wall space you need depends on the width and style of your curtains. Wider curtains generally require more stacking space. Use our curtain stacking calculator to estimate how much room your curtains will need on either side of the window.

How does curtain stacking work with blackout or double curtains?

Double curtains have a sheer and a blackout layer, so there is more fabric to stack. Allow enough wall space and a track wide enough for both layers, and contact our team if you're unsure.