Painting Formulas

Updated on 01 Sep 2023
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Before reading this article, ensure you have read Measurement - Parts & Labour and Using Formula within Groundplan articles to aid in understanding the following Formula examples.

Please 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.

📝 The Formula values provided in this article are for example purposes only.

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:

Part	Explanation	Formula	UMO
Undercoat	How many litres are required when the ceiling is `2.4m high` divided by an averaged `1 litre based on covering 6m2`	*`ceil(len2.4/6)`**	Litres
Undercoat (20L bucket)	How many 20L buckets are required when the ceiling is `2.4m high` 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` 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` 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 `height of 2.4m` for the total m2	*`len2.4`**	m2

Exterior Cladding

Example Parts for painting exterior cladding using an Area Measurement:

Part	Explanation	Formula	UMO
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

Removals

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.

Sliding Door Removal

Example Parts for the removal of a 2400mm x 2200mm sliding door using a Count Measurement:

Part	Explanation	Formula	UMO
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

Window Removal

Example Parts for the removal of any length window with a height of 1.2m using a Length Measurement:

Part	Explanation	Formula	UMO
Total wall area	Calculating a `negative m2` of the total area covered by a window with a height of `1.2m` to be removed from the Total wall area Grouped Part	*`-len1.2`**	m2