A complete list of the calculators available on this site

General Calculators

Yd² to m² Area in square yards:

Area in square metres is:

Converts square yards to square metres. Appears on: Design & Consult

Quality Reports

Sub-base Coverage The area to be covered is...

square metres...

...and the compacted sub-base should be

millimetres thick/deep You will need approximately...

T of DTp1 Description: Calculates tonnage of DTp1/DTp2 or "Crusher Run" required when thickness and area are known. Appears on: Sub-bases

Grit Sand Volume The area to be covered is...

square metres...

...and the compacted bedding should be

millimetres thick/deep You will need approximately.....

T of Grit Sand Description: Calculates tonnage of grit sand required when compacted thickness and total area is known. Appears on: Laying Block Paving

Screeding

Calculators for Concretes and Mortars

Concrete Volume Enter dimensions of rectangle to be concreted:

Length metres

Width metres

Thickness millimetres You will need approximately...

m³ of concrete Description: Calculate required quantity of concrete. Appears on: Concrete

C7.5 Concrete The volume of concrete required is

cubic metres

You will need approximately...

Kg of cement

Kg of sand

Kg of gravel

Litres of water Description: Estimate volumes of aggregates and cement needed to mix a C7.5 equivalent concrete as used for bedding kerbs and edgings. Appears on: Laying Edgins

C20 Concrete The volume of concrete required is

cubic metres You will need approximately.....

Kg of cement

Kg of sand

Kg of gravel

Litres of water Description: Calculate quantities of sands, gravels and cement needed to mix a general purpose C20 equivalent concrete. Appears on: Mortars&Conc

Grano Mix The volume of concrete required is

cubic metres (m³) You will need approximately...

For Pure Mix

Kg of grano dust

Kg of cement

Litres of water For Softened Mix

Kg of grano dust

Kg of cement

Kg of sand

Litres of water Description: Calculate quantities of grano dust, sand and cement needed to make two forms of granolithic mortar. Appears on: Grano

3:1 Bedding Mix The area to be paved is...

square metres Assuming a 50mm deep bed,

you will need approximately.....

T of Grit Sand

bags @ 25Kg]

PLUS

Kg of cement

bags @ 25Kg] Description: Determine quantities of sand and cement required to prepare this bedding grade mortar suitable for laying all flags. Appears on: Bedding Materials

6:1 Bedding Mix The area to be paved is...

square metres Assuming a 50mm deep bed,

you will need approximately.....

T of Grit Sand

bags @ 25Kg]

PLUS

Kg of cement

bags @ 25Kg] Description: Determine quantities of sand and cement required to prepare this bedding grade mortar suitable for laying most flags. Appears on: Bedding Materials

10:1 Bedding Mix The area to be paved is

square metres Assuming a 50mm deep bed,

you will need approximately.....

T of Grit Sand PLUS

Kg of cement

bags @ 25Kg Description: Determine quantities of sand and cement required to prepare this bedding grade mortar suitable for laying patio flags. Appears on: Bedding Materials

3:1 Bedding Mix The area to be paved is...

square metres Assuming a 50mm deep bed,

you will need approximately.....

T of Grit Sand

bags @ 25Kg]

PLUS

Kg of cement

bags @ 25Kg] Description: Determine quantities of aggregates required to prepare this lean mix concrete. Appears on: Bedding Materials

Bricklaying Mortar The area of brickwork to be laid is

square metres You will need approximately.....

Kg of sand

Kg of cement

Don't forget the plasticiser! Description: Calculate approximate quantities of sand and cement needed for bricklaying projects. Appears on: Brickwork

Gradient Calculators

Fall Calculator Enter distance (run) and gradient required: Distance = m Gradient = 1: You will need approximately.....

mm of fall over that distance Which is equivalent to...

mm of fall per linear metre Description: Calculate amount of fall required for any ration over any distance Appears on: Understanding Falls and Gradients

To convert a gradient percentage to a ratio: Gradient = % ...is equivalent to a ratio of...

1: Description: Convert a gradient percentage to a ratio Appears on: Understanding Falls and Gradients

To convert a gradient ratio to a percentage: To convert a gradient ratio to a percentage: Ratio = 1: ...is equivalent to a gradient of... % Description: Convert a gradient ratio to a percentage Appears on: Understanding Falls and Gradients

Calculators for Flags

BS Flags Coverage The area to be paved is

m² Choose ONE size only. You will need approximately.....

Large Element

Size A [450x600mm]...OR

Size B [600x600mm]...OR



Size C [750x600mm]...OR

Size D [900x600mm]

Small Element

Size E [450x450mm]...OR

Size F [400x400mm]...OR

Size G [300x300mm]

Remember to allow for wastage Description: Estimate just how many BS flags are needed to cover a given area. Appears on: BS Flags

Bedding for Flags The area to be paved is

square metres You will need approximately.....

T of sand only

OR

T of sand PLUS

Kg of cement

bags @ 25Kg] Description: Determine quantities of sand or sand+cement for laying flags/slabs. Appears on: Laying Flags

Imperial Flag Coster The robbing sods are charging £ a piece

for a flag that's inches long

and inches wide. That's flamin' £ per square yard!!

(£ per m²) Description: Calculates cost per Yd² and per m² for imperial flags. Appears on: Patio Flags

Metric Flag Coster The thieving gits are charging £ a piece

for a flag that's mm long

and mm wide. That's a whopping £ per square metre!!

(£ per yd²) Description: Calculates cost per m² and per yd² for metric flags. Appears on: Patio Flags

5-size generator The paving will be

square metres You will need approximately.....

@ 600x600mm

@ 600x450mm

@ 600x300mm

@ 450x450mm

@ 300x300mm Description: Estimates number of each size of flag from a 5-size range needed to pave a given area. Appears on: Random Layouts

6-size generator The paving will be

square metres You will need approximately.....

@ 600x600mm

@ 600x450mm

@ 600x300mm

@ 450x450mm

@ 450x300mm

@ 300x300mm Description: Estimates number of each size of flag from a 6-size range needed to pave a given area. Appears on: Random Layouts

9-size generator The paving will be

square metres



You will need approximately.....

@ 900x600mm @ 750x750mm @ 750x600mm

@ 600x600mm @ 600x450mm @ 600x300mm

@ 450x450mm @ 450x300mm @ 300x300mm Description: Estimates number of each size of flag from a 9-size range needed to pave a given area. Appears on: Random Layouts

Calculators for Jointing

Pitch Jointing Paver length mm

Paver width mm

Joint width mm

Joint depth* mm

* using solid pitch joint You will need approximately.....

Kg of pitch per m² Description: Estimates quantity of pitch required to joint a given area of setts. Appears on: Pitch Jointing

Polymeric Jointing Paver length mm

Paver width mm

Joint width mm

Joint depth mm You will need approximately.....

Kg of polymeric per m² Description: Estimates quantity of one-part polymeric jointing mortar required to joint a given area of paving. Appears on: Polymeric Jointing

Resin Mortar Jointing Paver length mm

Paver width mm

Joint width mm

Joint depth mm You will need approximately...

Kg of resin grout per m² Description: Estimates quantity of Two-Part Resin jointing mortar required to joint a given area of paving. Appears on: Resin Slurry Jointing