How many eyelets do I need per curtain?

Eyelets should be evenly spaced 12-18cm apart. Each curtain must have an even number of eyelets so the leading edge folds towards the window. This creates the signature wave fold of eyelet curtains.

What size eyelets should I use?

Match the eyelet inner diameter to your pole diameter. Standard sizes are 28mm, 35mm, and 40mm. The eyelet inner diameter should be slightly larger than the pole to slide freely. 40mm eyelets suit 28-35mm poles.

How much heading fabric do I need above eyelets?

Allow 2-4cm of fabric above the eyelet ring for a stand-up heading. The heading folds over so you need double this plus the eyelet depth. This is included in the cut drop calculation.

Do I need eyelet tape or can I use loose eyelets?

You can use either. Eyelet tape (header tape with pre-spaced holes) is easier for beginners. Loose clip-together eyelets allow custom spacing. Both need a stiffened heading — use buckram or header tape interfacing.

SewCalcs

Eyelet Curtain Calculator — Eyelets & Fabric

Calculate eyelet spacing, heading fabric and ring quantities.

Pole Width

Finished Drop

From top of eyelet ring to hem

Eyelet Inner Diameter

Eyelet Spacing

Heading Above Eyelet

Hem Allowance

Fabric Width

Fabric Price (optional)

How We Calculate This

Eyelet curtains use 2x fullness. The number of eyelets is calculated from the curtain width and spacing, always rounded to an even number.

The formula

Total width = Pole width × 2

Eyelets per curtain = round(Width per curtain ÷ Spacing) (rounded to even number)

Heading fold = (Above eyelet + Eyelet radius + 2cm) × 2

Cut drop = Curtain drop + Hem + Heading fold

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Always verify quantities before cutting or purchasing fabric.