Cost per square yard for tar and chip driveway?

Stone Chips = 2.833 lbs/sf

Tar = 22.8 sf/gal @ .4-in thick

Notes: The equipment spray bar is 12-ft wide. If your road is 18-ft wide 200-ft long, 2 passes are required.

Your calculation: 200-ft x 18-ft = 3600-sf x 2 passes = 7200-sf

7200-sf x 2.833 = 20397.6 lbs / 2000-lbs = 10.2-ton

10.2-ton x $14.45/ton (or local cost) = $147.39 for the chips

200-ft x 18-ft = 3600-sf x 2 passes = 7200-sf

7200-sf / 22.5-gal = 320-gal

320-gal x $2.10/gal (or local cost) = $672.00 for the tar

Labor and equipment are local costs and dependent on the contractor