MEASURED QUANTITY SENSITIVITY

Deck board — actual board width scenarios.

How does changing actual board width affect deck board when the other inputs stay fixed?

What this decision changes

This measured quantity or supplied dimension enters the method on its stated unit basis. Other inputs stay fixed so its effect can be separated from net deductions, stock constraints or purchase rounding. Method basis: This straight layout rounds each row to whole purchased lengths before adding allowance. It does not optimise offcut reuse or specify joins.

The focus is actual board width. All other shared inputs remain fixed for each evaluated range.

Boards = rows across width × pieces along lengthDeck Board 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 actual board width; the other entered values stay fixed.

Display units

Measured plan and product inputs

Length

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.

Width

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.

Actual board width

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.

Purchased board length

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.

Specified gap

Waste allowance

Shortcuts only; choose your own allowance above.

Where to get this value

Enter your own allowance. Presets are input shortcuts, not a construction recommendation.

Supplied comparison range for actual board width

Lower supplied comparison value

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.

Upper supplied comparison value

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.

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: Boards to purchase — 44 boards. Rejected combinations remain visible below.

Quantity to plot

Each bar is one actual calculated boards to purchase. Horizontal values: actual board width in mm.

Actual board width	Boards to purchase	Change from baseline	Use this scenario
60 mm	75 boards	31 boards	Open in calculator Exact quantity breakdown Deck area 8 m² Board rows 34 Pieces per row 2 Boards before allowance 68
72.5 mm	62 boards	18 boards	Open in calculator Exact quantity breakdown Deck area 8 m² Board rows 28 Pieces per row 2 Boards before allowance 56
85 mm	53 boards	9 boards	Open in calculator Exact quantity breakdown Deck area 8 m² Board rows 24 Pieces per row 2 Boards before allowance 48
97.5 mm	47 boards	3 boards	Open in calculator Exact quantity breakdown Deck area 8 m² Board rows 21 Pieces per row 2 Boards before allowance 42
110 mm	42 boards	-2 boards	Open in calculator Exact quantity breakdown Deck area 8 m² Board rows 19 Pieces per row 2 Boards before allowance 38
122.5 mm	38 boards	-6 boards	Open in calculator Exact quantity breakdown Deck area 8 m² Board rows 17 Pieces per row 2 Boards before allowance 34
135 mm	33 boards	-11 boards	Open in calculator Exact quantity breakdown Deck area 8 m² Board rows 15 Pieces per row 2 Boards before allowance 30
147.5 mm	31 boards	-13 boards	Open in calculator Exact quantity breakdown Deck area 8 m² Board rows 14 Pieces per row 2 Boards before allowance 28
160 mm	29 boards	-15 boards	Open in calculator Exact quantity breakdown Deck area 8 m² Board rows 13 Pieces per row 2 Boards before allowance 26

Read the evaluated results

Read calculated demand, whole purchases and exact detail lines separately. This specific input may change quantity continuously, cross a purchase step or make the stated geometry or stock fit invalid.

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 measurements or already specified alternatives. Quantity sensitivity does not establish material suitability or construction requirements.

Only quantities from supplied dimensions and specifications are calculated.

No material-property reference values are bundled; obtain product values from the selected supplier's data sheet.

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

Deck Board Calculator

Other independent input decisions

Prepare the actual material data

Read the measurement and purchase guides

Use installed intersections rather than spare purchased boards for fastener takeoff

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