Earthwork & Drainage Calculators
Dirt and stone are bought by weight, moved by volume and swell when you dig them. These calculators carry that conversion so a truck count is not off by a third.
There are 3 calculators here: Dirt Haul-Off Truckload Calculator (swell, truckloads and haul-off cost for excavated soil), French Drain Gravel & Rock Calculator (gravel or rock tonnage, pipe, fabric and cost for a french drain), and Gravel Driveway Tonnage & Cost Calculator (stone tonnage, truckloads and cost for a gravel driveway).
They all work the same way: quantity first, then a waste allowance you can change, then a price built from verified figures and adjusted for your state. Cost is always a range rather than a single number, and every assumption behind it is printed on the page with its source and the date it was last checked.