TARCalc

About TARCalc Android App

This app will calculate the Tonnage you require when laying Tarmac/Asphalt/SMA or any road surface material normally measured in cubic metres and sold by the (metric) Tonne.

The firm you contract with to lay the surface material will usually quote you by the Square Metre (inclusive of labour and material) but exclusive of any additional base works - the app will calculate the area for you - you need to apply the contractors rate to give you the laying costs.

If you need assurance that the contractor is quoting you accurately, or indeed if you are taking on the job yourself, then you will need to arrive at the cost of the material. Apart from the surface area being covered, the next important metric is the depth at which the material will be laid. A good rule of thumb for Tarmac is that the material should be laid at a depth which is 3 times the stone size in the Tarmac - e.g. if the Tarmac is 20mm stone then you should be thinking of laying at a depth of 60mm.

With the area and the depth identified the app will calculate the number of cubic metres required. If all of this wasn't complicated enough, when you go to your supplier he will more than likely quote you for the material in (metric) Tonnes ! The app will calculate this for you once the number of cubic metres has been determined. Over to you again, when you have the rate per Tonne from the supplier you can then determine the cost of the surface material with the Tonnage information from the app.

Oh, one last item, you will obviously need to consider laying a good foundation or basecourse of sand/gravel/stone the calculations for which are not covered by this version of the app.