

Calculators 
A complete listing of the popup calculators available on this site 
General Calculators 

Yd² to m² 
Converts square yards to square metres 
Appears on: Design & Consult Quality Reports 


Subbase Coverage 
Calculates tonnage of DTp1/DTp2 or "Crusher Run" required when thickness and area are known. 
Appears on: Subbases 


Grit Sand Volume 
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 
Calculate required quantity of concrete 
Appears on: Concrete Page 


C7.5 Concrete 
Estimate volumes of aggregates and cement needed to mix a C7.5 equivalent concrete as used for bedding kerbs and edgings 
Appears on: Laying Edgings Page 


C20 Concrete 
Calculate quantities of sands, gravels and cement needed to mix a general purpose C20 equivalent concrete 
Appears on: Mortars&Conc Page 


3:1 Bedding Mix 
Determine quantities of sand and cement required to prepare this bedding grade mortar suitable for laying all flags 
Appears on: Bedding Materials Page 


6:1 Bedding Mix 
Determine quantities of sand and cement required to prepare this bedding grade mortar suitable for laying most flags 
Appears on: Bedding Materials Page 


10:1 Bedding Mix 
Determine quantities of sand and cement required to prepare this bedding grade mortar suitable for laying patio flags 
Appears on: Bedding Materials Page 


Lean Mix Concrete 
Determine quantities of aggregates required to prepare this lean mix concrete 
Appears on: Bedding Materials Page 


Bricklaying Mortar 
Calculate approximate quantities of sand and cement needed for bricklaying projects 
Appears on: Brickwork Page 


Calculators for Flags 

BS Flags 
Estimate just how many BS flags are needed to cover a given area 
Appears on: BS Flags Page 


Bedding for Flags 
Determine quantities of sand or sand+cement for laying flags/slabs 
Appears on: Laying Flags Page 


Imperial Flag Coster 
Calculates cost per Yd² and per m² for imperial flags 
Appears on: Patio Flags Page 


Metric Flag Coster 
Calculates cost per m² and per yd² for metric flags 
Appears on: Patio Flags Page 


5size generator 
Estimates number of each size of flag from a 5size range needed to pave a given area 
Appears on: Random Layouts Page 


6size generator 
Estimates number of each size of flag from a 6size range needed to pave a given area 
Appears on: Random Layouts Page 


9size generator 
Estimates number of each size of flag from a 9size range needed to pave a given area 
Appears on: Random Layouts Page 