construction calculator

Wallpaper Calculator

Estimate wallpaper rolls for a room, including a planning allowance for pattern repeat and waste.

Estimate

Enter job values, review the estimate, then use the decision hints before ordering or quoting.

Estimate Results

Enter values to see the result.

Context

Wall area + 15% waste for pattern repeat and trimming. Average roll covers 45 sq ft.

Next Step

Accent wall or full room wallpaper project
Buying designer wallpaper with large pattern repeat
Planning a nursery or feature wall

Check

Forgetting pattern repeat waste (can be 20–30%)
Not adding extra for doors and windows

Reference

lengthheightrolls
1285
2099

Example

12 ft × 8 ft wall → 5 rolls (with 15% waste)
Full room 4 walls (320 sq ft) → 9 rolls

Formula

Rolls = (Length × Height × 1.15) / 45

15% waste covers trimming and pattern matching. Use 25% for large patterns.

One standard roll = 45 sq ft usable

Next Step

Next Calc

Paint Calculator

Estimate paint from room dimensions, coat count, and opening area so you can buy once and finish the job.

Next Calc

Brick & Mortar Calculator

Estimate bricks and mortar for a wall build so you can plan quantities before final layout and waste adjustments.

Next Calc

Concrete Curb & Gutter Calculator

Calculate concrete needed for curbs, gutters and driveway edges.

System note: validate this estimate against local code and supplier requirements before ordering.

FAQ

How much extra for pattern matching?

Add 15% standard, 25% for large patterns.

Do I subtract windows?

Yes — but keep 1 extra roll for mistakes and future repairs.

Important Use Notice

Planning calculator only. Do not rely on this page alone for structural design, permitting, code compliance, engineering signoff, procurement quantities, or contractual commitments.