The Journal — Buyer's Guide

How Much Wallpaper Do I Need?

Ordering too little means a second order and potential dye lot mismatches. Ordering too much wastes money. Here is the exact method.

Custom Sized to Your Wall

Vintage Chinoiserie Floral Bird Mural

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Every Golden Era Walls mural is custom cut to your exact wall dimensions — order precisely what you need, nothing more.

Ordering too little wallpaper means a second order and potential dye lot mismatches. Ordering too much wastes money. Getting the calculation right before you buy is the single most important step in any wallpaper project.

The Simple Formula

1. Calculate the total square footage of the area to be covered (width × height)
2. Subtract large openings (doors, windows) only if they're over 15 sq ft each
3. Add 10–15% for waste (trimming, alignment, mistakes)
4. Add extra for pattern repeats if your design has a repeating motif

Quick formula: (Width × Height) × 1.15 = minimum square footage to order

Room-by-Room Reference

Pattern Repeat: Why It Affects How Much You Order

• No repeat / random pattern: Add 10–15% waste (multiply by 1.15)
• Small repeat (under 12 inches): Add 15–20% waste (multiply by 1.20)
• Large repeat (over 12 inches): Add 20–25% waste (multiply by 1.25)

Mural-style wallpapers (one continuous image) have no pattern repeat to match — 15% waste is sufficient.

Frequently Asked Questions

How do I calculate how much wallpaper I need?

Multiply wall width × height, then multiply by 1.15 for a 15% buffer. Example: 12ft × 9ft = 108 sq ft × 1.15 = 124 sq ft to order.

Do I need to subtract doors and windows?

For most rooms, keep them in your calculation as waste buffer. Only subtract if you have many large openings and are trying to minimize cost.

How much extra should I order for mistakes?

Order at least 10–15% more than your calculated square footage. For first-time installers or large pattern repeats, use 20–25%.