$$Weight = Density × Volume = 150\,lb/ft^3 × 100\,ft^3 = 7.5\,t$$Īnd finally the total estimated cost of the landscaping project: You can therefore calculate it using the formulae: Well, these are both easy to calculate! □ĭensity is a measure of mass per volume. We imagine you are now wondering: What if I don’t know the density or unit price? $$Cost = Price\,per\,Unit\,Volume × Volume$$ $$Cost = Price\,per\,Unit\,Mass × Weight$$ If you know the price per unit mass or price per unit volume, then the calculator can work out the total cost of the required material: There is also an option for “custom density” which we will show you later. NB: You’ll notice that our calculator has a number of predetermined densities. How to Build a Retaining Wall with an Inside 90° Wall (wonderhowto.It does this using the following Mathematical formula:Īlso, if you know the density of the material you will be using, our calculator can work out the total required weight:.
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