3 Steps to Perfect Spacing – No Mistakes, Even for Beginners!

BTTO’s Ultimate Grommet Curtain Guide: 3 Steps to Perfect Spacing – No Mistakes, Even for Beginners!

Introduction

Struggling to calculate the right grommet spacing for your curtains? Renting and want to DIY but scared of getting the math wrong? Don’t worry! BTTO shares a “Golden Formula” verified by German engineers that helps you achieve professional curtain grommet spacing using only basic school math. No special tools needed – just follow along!

1. Why Grommet Spacing Matters

Incorrect spacing leads to three major problems:

• Twisted Pleats – fabric looks warped and uneven
• Difficult to Slide – drawing curtains becomes a workout
• Light Gaps – blackout curtains become useless in the morning

BTTO’s solution: precise calculation + standardized production = perfect pleats and elegant drape, even with affordable curtains.

2. Step-by-Step Guide: 320 cm Window Example

We’ll use a typical German window width of 320 cm. Other sizes can be substituted easily.

STEP 1: Calculate Fabric Needed

Tip:

- Small windows: use 1.5× for budget

- Large windows: use 2.5× for a luxurious look

STEP 2: Determine Single Curtain Size

STEP 3: Grommet Spacing Calculation (2 Methods)

Method 1: Symmetrical Aesthetics

1. Grommet count = finished width (m) × 6 = 3.1 × 6 = 18.6 → round to nearest even number → 18 grommets

2. Spacing = width (cm) ÷ number of grommets = 310 ÷ 18 ≈ 17.2 cm

3. Edge spacing = spacing ÷ 2 = 8.6 cm

Effect: perfectly symmetrical grommets – for perfectionists!

Method 2: Wall-Fitting Solution (for small spaces or obstacles)

1. Still use 18 grommets

2. Set edge gap (e.g. 7 cm from wall)

3. Spacing = (width – 2×edge gap) ÷ (grommet count – 1)

= (310 – 14) ÷ 17 ≈ 17.4 cm

Effect: ideal when curtains are mounted close to a wall.

3. BTTO’s Bonus Tips for Easy DIY Grommets

1. Golden Rule: 6 grommets per meter of fabric (even numbers only!)

2. Eliminate error: round to 1 decimal place, mark holes using a washable pen

3. No math needed? BTTO’s pre-grommeted curtains are pre-calculated to fit German standard window sizes

Recommended Product: BTTO Blackout Grommet Curtain｜Ready to Hang｜14 Standard Sizes

4. FAQs

Q: What if I get an odd number of grommets?

→ Round up to the nearest even number. E.g., 17 → use 18 and recalculate spacing

Q: What if my window isn’t 320 cm wide?

→ Use this formula:

Finished width = (window width × multiplier ÷ 2) – 10

Grommets = finished width (in meters) × 6 → round to even

Example: 280 cm window

→ Fabric = 280 × 2 = 560 cm

→ One panel = 280 cm – 10 cm = 270 cm

→ Grommets = 2.7 × 6 = 16.2 → use 16

Q: Which grommet punch should I buy?

→ BTTO recommends: metal puncher with 4.5 cm diameter – plastic versions crack easily

Conclusion

In just 3 simple steps, you can calculate and install your own curtains with a professional look – no sewing course required.