Home & Building

Practical construction calculators for pouring concrete slabs and estimating gravel tons for driveways, paths, and borders.

The calculators in this category are listed below. Each link opens the full calculator on CalcFree.

Calculators in this category

Find the exact volume in cubic yards and meters needed for slabs, footings, or post holes, plus how many pre-mix bags to buy.

How it is calculated: Cubic Yards = (Length [ft] × Width [ft] × Thickness [in] ÷ 12) ÷ 27; Add 10% for subgrade variance

Determine how many cubic yards and tons of gravel or crushed stone you need for driveways, paths, and drainage trenches.

How it is calculated: Volume (Cu Yds) = (Length × Width × Depth in Feet) ÷ 27; Weight (Tons) = Volume × Bulk Density (~1.4 tons/yd³)