Before reading this article, ensure you have read Adding parts and labour and Using formula within Groundplan articles to aid in understanding the following formula examples.

📝Note:

Doubled-sided and single-sided walls would need separate measurements as the parts and labour are different.
If there is more than one ceiling height on the project, each height must be a separate measurement with the correct formula, parts and/or labour applied.

Term	Explained
`count`	total counts
`len`	total metres measured
`area`	total square metres measured
`count, len or area / x`	total count/length/area divided by an `amount`
*`count, len or area x`**	total count/length/area multiplied by an `amount`
`ceil(x)`	rounding up a decimal value to the next whole number

Internal walls

Example parts for painting a single-sided wall with a 2.4 high ceiling length measurement:

📝Note: This example uses the height section of the measurement unit.

Part	Explanation	Formula	UoM
Undercoat	How many litres are required when the ceiling is `2.4m high` automatically applied for the length drawn divided by an averaged `1 litre based on covering 6m2`	`ceil(area/6)`	Litres
Undercoat (20L bucket)	How many 20L buckets are required when the ceiling is `2.4m high` automatically applied for the length drawn divided by an averaged `1 litre based on covering 6m2` divided by a `20L bucket`	*`len2.4/6/20`**	Buckets
Top coat	How many litres are required when the ceiling is `2.4m high` automatically applied for the length drawn divided by an averaged `1 litre based on covering 6m2` multiplied by `2 coats required`	*`ceil(len2.4/62)`*	Litres
Top coat (20L bucket)	How many 20L buckets are required when the ceiling is `2.4m high` automatically applied for the length drawn divided by an averaged `1 litre based on covering 6m2` multiplied by `2 coats required` divided by a `20L bucket`	*`len2.4/6/2/20`*	Buckets
Cornice	How many `total metres` measured	`len`	m
Skirting	How many `total metres` measured	`len`	m
Total wall area	Total length measured multiplied by the `2.4m high` automatically applied for the length drawn for the total m²	`area`	m²

Exterior Cladding

Example parts for painting exterior cladding using an area measurement:

Part	Explanation	Formula	UoM
Undercoat	How many litres are required for the area measured divided by an averaged `1 litre based on covering 6m2`	`ceil(area/6)`	Litres
Undercoat (20L bucket)	How many 20L buckets are required for the area measured divided by an averaged `1 litre based on covering 6m2` divided by a `20L bucket`	`area/6/20`	Buckets
Top coat	How many litres are required for the area measured divided by an averaged `1 litre based on covering 6m2` multiplied by `2 coats required`	*`ceil(area/62)`**	Litres
Top coat (20L bucket)	How many 20L buckets are required for the area measured divided by an averaged `1 litre based on covering 6m2` multiplied by `2 coats required` divided by a `20L bucket`	*`area/6/2/20`**	Buckets
Total exterior wall	Total `exterior area measured` after door / windows were removed	`area`	m²

There are different ways to calculate window and door removals using parts with negative formula applied. All involve grouping of parts.

Alternatively, if usage permits, use the area cut-out tool to remove windows from elevations plans as well.

Example parts for the removal of a 2400mm x 2200mm sliding door using a count measurement:

Part	Explanation	Formula	UoM
Total wall area	Calculating `negative m2` of the total area covered by a sliding door `2400mm x 2200mm = 5.28m2` to be removed from the Total wall area Grouped Part	*`-count5.28`**	m²

Example parts for the removal of any length window with a height of 1.2m using a length measurement:

📝Note: This example uses the height section of the measurement unit.

Part	Explanation	Formula	UoM
Total wall area	Calculating a `negative m2` of the total area covered by a window with a height of `1.2m` automatically applied for the length drawn to be removed from the Total wall area Grouped Part	`- area`	m²

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