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.

📝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`
*`+ len x`**	add the perimetre of the area drawn multiplied by an `amount`
`ceil(x)`	rounding up a decimal value to the next whole number

Internal Door

Measurement part formula examples to calculate a 2040mm x 820mm x 35mm internal door using a count measurement:

Part	Explanation	Formula	UoM
Internal Door 2040mm x 820mm x 35mm	`Doors` counted	`count`	each
Gainsborough G3 series satin chrome	`Handles` required	`count`	each
Hinges	`Number` of hinges required for `3 hinges` per door	*`count3`**	each
Rebated door jamb (5.4m length)	Number of `5.4 lengths` required for each door	`count`	lengths
Bevelled edge architrave 42mm x 11mm (5.4m length)	Number of `5.4 lengths` required for `each side of the door`	*`count2`**	lengths

Framing

Example parts for frame including bottom, top and ribbon plates, noggins and studs @450mm spacing (2.4m lengths) length measurement:

⚠️Warning: This example does NOT use the height component in the measurement unit section

Part	Explanation	Formula	UoM
MGP 10 Framing pine H2 90mm x 35mm (2.4m lengths)	The total length measured divided by `lengths of 2.4m` multipled by *`4` for bottom plate, noggins, top and ribbon plates, added to the total length measured divided by `studs every 450mm`**	*`(len/2.44) + (len/0.45)`**	lengths

Cladding

Example parts for primeline newport 4200mm x 170mm x 9mm area measurement:

Part	Explanation	Formula	UoM
Primeline Newport 4200mm x 170mm x 9mm (0.588m2 coverage)	Total area measured after doors and windows were removed divided by `0.588m2 of board coverage`	`ceil(area/0.588)`	boards

Brickwork

Example parts for standard brickwork area measurement:

Part	Explanation	Formula	UoM
Brickwork Standard	`Area` of brickwork required after windows and doors were removed	`area`	m²
Bricks	How many `bricks` are required after windows and doors were removed when `50 bricks` fit into an average m2 and allow for `10% wastage`	*`ceil(area501.10)`*	each

Concrete

Example parts for a 150mm thickness concrete area measurement:

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

Part	Explanation	Formula	UoM
Concrete 150mm	How much m³ of concrete which the `150mm` depth is automatically applied for the area drawn	`volume`	m³
Formwork	How many metres of formwork is required for the `perimeter around the area` measured	`len`	m
Steel mesh 4.56m x 1.97m (7.5m2 coverage)	How many `7.5m2 coverage` sheets are required for the area measured	`ceil(area/7.5)`	sheets
Bar chairs (pk500)	How many chairs are required to support the steel mesh with `4 per m2` and come in a `bag of 500`	*`ceil(area4/500)`**	bags

Strip footings

Example parts for a strip footings length measurement:

📝Note: This example uses the depth and width section of the measurement unit.

Part	Explanation	Formula	UoM
Trench	How many cubic metres required for the total length measured automatically adding a `450mm` depth and `450mm` width for the length drawn and allow for `10% expansion`	*`volume1.10`**	m³
Concrete	How many cubic metres required for the total length measured automatically adding a `450mm` depth and `450mm` width for the length drawn and allow for `10% expansion`	*`volume1.10`**	m³

Decking

Example parts for a Kwila Decking 90mm x 19mm (including 5mm gaps) area measurement:

Part	Explanation	Formula	UoM
Kwila Decking 90mm x 19mm	How many `metres` of decking boards are required when `10.52m` covers 1 m2 with 5mm gaps and allow for `10% wastage`	*`(area10.52m)1.10`*	m

Waterproofing

Example parts for a waterproofing area measurement:

Part	Explanation	Formula	UoM
Wet Areas	Total `area` measured	`area`	m²
Primer	How many `Litres` are required for the area measured plus `100mm` up the wall around the perimetre of the area divided by an average of `1 litre based on covering 6m2`	*`(area+len0.1)/6`**	Litres
WP Membrane	How many `Litres` are required for the area measured plus `100mm` up the wall around the perimetre of the area divided by an average of `1 litre based on covering 1.5m2` multiplied by `2 coats`	*`(area+len0.1)/1.52`*	Litres

Tiling

Example 1 - Floor area

Parts for limestone porcelain 600mm x 600mm floor tiles area measurement:

Part	Explanation	Formula	UoM
Limestone porcelain 600mm x 600mm floor tiles	`Area` of tiles required after cabinets and islands benches were removed	`area`	m²
Limestone porcelain boxes	How many `boxes` are required when a box covers `1.44m2` and allowing for `20% wastage`	*`ceil(area/1.441.20)`**	boxes

Example 2 - Wall area

Parts for subway grey 200mm x 100mm wall tiles length measurement:

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

Part	Explanation	Formula	UoM
Subway grey wall tiles 100 x 200mm	How many m² of tiles are required when the tiles `600mm` height is automatically applied for the length drawn	area	m²
Subway grey boxes	How many `boxes` are required for the total when `600mm` height is automatically applied for the length drawn. A box covers `1.14m2` and allowing for `10% wastage` while rounding the entire amount up to the nearest whole number `ceil`	*`ceil((len0.6/1.14)1.10)`*	boxes

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Construction formula examples: framing, brickwork, footings, tiling and more