SUPPLIED LAYOUT INTERVALS

Mixed height wallpaper roll allocation — vertical straight repeat scenarios.

How does changing vertical straight repeat affect mixed height wallpaper roll allocation when the other inputs stay fixed?

What this decision changes

The chosen interval or repeat changes discrete positions, full rows or complete pattern cuts. It is different from a blanket percentage added to area. Method basis: Allocate straight-match wallpaper drops of different heights to rolls after repeat rounding and initial alignment loss. Does not use half-drop rules or mix incompatible rolls. Roll count is a heuristic allocation.

The focus is vertical straight repeat. All other shared inputs remain fixed for each evaluated range.

Drops round to whole straight repeats; first-fit decreasing packs these lengths into roll length minus initial alignment loss.Mixed Height Wallpaper Roll Allocation Calculator

Evaluate your supplied alternatives

Start with your measured plan and selected product data. The initial values and range are illustrative. Each scenario changes only vertical straight repeat; the other entered values stay fixed.

Display units

Measured plan and product inputs

Roll length

Where to get this value

Use the actual usable quantity or dimensions of the product you intend to buy. Check the label and the unit shown here.

Initial alignment loss per roll

Vertical straight repeat

Combined trimming allowance per drop

Entries 1

Measured covered height

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Drops at this height

Entries 2

Measured covered height

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Drops at this height

Supplied comparison range for vertical straight repeat

Lower supplied comparison value

Upper supplied comparison value

Nine evenly spaced values are evaluated. Whole counts are rounded to distinct integer scenarios. Values between the listed samples are not calculated.

9 evaluated scenarios

Baseline: Rolls for this allocation — 2 rolls. Rejected combinations remain visible below.

Quantity to plot

Each bar is one actual calculated total aligned cut length. Horizontal values: vertical straight repeat in m.

Vertical straight repeat	Total aligned cut length	Change from baseline	Purchase result	Use this scenario
0.6 m	20.4 m	0.4 m	3 rolls	Open in calculator Exact quantity breakdown Aligned drops 4 Total aligned cut length 20.4 m Unallocated usable roll length 9.6 m Longest-first first-fit allocation; feasible, not guaranteed minimum. Straight-match only; half-drop and incompatible lots are excluded.
0.725 m	21.75 m	1.75 m	3 rolls	Open in calculator Exact quantity breakdown Aligned drops 4 Total aligned cut length 21.75 m Unallocated usable roll length 8.25 m Longest-first first-fit allocation; feasible, not guaranteed minimum. Straight-match only; half-drop and incompatible lots are excluded.
0.85 m	22.1 m	2.1 m	3 rolls	Open in calculator Exact quantity breakdown Aligned drops 4 Total aligned cut length 22.1 m Unallocated usable roll length 7.9 m Longest-first first-fit allocation; feasible, not guaranteed minimum. Straight-match only; half-drop and incompatible lots are excluded.
0.975 m	23.4 m	3.4 m	3 rolls	Open in calculator Exact quantity breakdown Aligned drops 4 Total aligned cut length 23.4 m Unallocated usable roll length 6.6 m Longest-first first-fit allocation; feasible, not guaranteed minimum. Straight-match only; half-drop and incompatible lots are excluded.
1.1 m	22 m	2 m	3 rolls	Open in calculator Exact quantity breakdown Aligned drops 4 Total aligned cut length 22 m Unallocated usable roll length 8 m Longest-first first-fit allocation; feasible, not guaranteed minimum. Straight-match only; half-drop and incompatible lots are excluded.
1.225 m	22.05 m	2.05 m	3 rolls	Open in calculator Exact quantity breakdown Aligned drops 4 Total aligned cut length 22.05 m Unallocated usable roll length 7.95 m Longest-first first-fit allocation; feasible, not guaranteed minimum. Straight-match only; half-drop and incompatible lots are excluded.
1.35 m	21.6 m	1.6 m	3 rolls	Open in calculator Exact quantity breakdown Aligned drops 4 Total aligned cut length 21.6 m Unallocated usable roll length 8.4 m Longest-first first-fit allocation; feasible, not guaranteed minimum. Straight-match only; half-drop and incompatible lots are excluded.
1.475 m	23.6 m	3.6 m	3 rolls	Open in calculator Exact quantity breakdown Aligned drops 4 Total aligned cut length 23.6 m Unallocated usable roll length 6.4 m Longest-first first-fit allocation; feasible, not guaranteed minimum. Straight-match only; half-drop and incompatible lots are excluded.
1.6 m	22.4 m	2.4 m	3 rolls	Open in calculator Exact quantity breakdown Aligned drops 4 Total aligned cut length 22.4 m Unallocated usable roll length 7.6 m Longest-first first-fit allocation; feasible, not guaranteed minimum. Straight-match only; half-drop and incompatible lots are excluded.

Read the evaluated results

Use the evaluated count steps to see when another row, column, drop or position enters the stated layout.

Replace every illustrative baseline measurement and selected product value with the inputs for your actual task.
Enter a comparison range on the focused input's stated unit and quantity basis.
Review rejected combinations and use the exact detail lines to distinguish measured demand from whole purchases.
Open an evaluated scenario in the full calculator to save its original inputs and quantity breakdown to a browser material project.

Keep the comparison within scope

Compare intervals already permitted by your plan or product. No safe spacing, structural layout or fixing requirement is chosen.

Does not use half-drop rules or mix incompatible rolls. Roll count is a heuristic allocation.

Dimensions, allowances, prices, properties and specifications are supplied by you. The tool computes their arithmetic consequences; it does not choose construction specifications or certify suitability.

Only the listed samples are evaluated. Intermediate values, alternate constraints and global cutting optimality are not inferred from the graph.

Continue with this quantity method

Mixed Height Wallpaper Roll Allocation Calculator

Other independent input decisions

Prepare the actual material data

Read the measurement and purchase guides

Allocate different wallpaper drop heights before buying rolls

Quantity method and illustrative scenarios checked 6 October 2026. Methods and scope.