Concrete Driveway Volume Calculator
Plan your driveway project with our free concrete driveway volume calculator. Get precise measurements, material lists, and budgets.
Formula
Volume (cu yd) = Length (ft) x Width (ft) x Thickness (in) / 12 / 27
Multiply the driveway length by width in feet to get the area. Convert thickness from inches to feet by dividing by 12. Multiply area by thickness in feet to get cubic feet. Divide by 27 to convert to cubic yards. Add a waste factor (typically 10%) for the final order quantity.
Worked Examples
Example 1: Two-Car Driveway
Problem: Calculate concrete volume for a 40 x 16 ft driveway at 5 inches thick with 10% waste.
Solution: Area = 40 x 16 = 640 sq ft\nVolume = 640 x (5/12) = 266.67 cu ft\nCubic yards = 266.67 / 27 = 9.88 cu yd\nWith 10% waste = 10.86 cu yd
Result: 10.86 cubic yards with waste factor
Example 2: Long Single-Car Driveway
Problem: Calculate concrete volume for a 60 x 10 ft driveway at 4 inches thick with 10% waste.
Solution: Area = 60 x 10 = 600 sq ft\nVolume = 600 x (4/12) = 200 cu ft\nCubic yards = 200 / 27 = 7.41 cu yd\nWith 10% waste = 8.15 cu yd
Result: 8.15 cubic yards with waste factor
Frequently Asked Questions
How do I calculate concrete volume for a driveway?
Multiply the driveway length by width (both in feet) to get the area in square feet. Convert the thickness from inches to feet by dividing by 12. Multiply the area by the thickness in feet to get volume in cubic feet. Divide by 27 to convert to cubic yards, which is how ready-mix concrete is sold. For a typical 40 x 16 foot driveway at 5 inches thick, you would need approximately 9.88 cubic yards of concrete before adding a waste factor.
How much extra concrete should I order for a driveway?
Order 10 percent extra for a standard rectangular driveway to account for uneven subgrade, spillage, form bulging, and finisher waste. For driveways with curves, aprons, or turnarounds, order 15 percent extra. If the existing grade is uneven or rocky, add 15 to 20 percent because low spots will consume more concrete than calculated. Running short during a pour creates a cold joint that permanently weakens the slab, so it is always better to over-order slightly than to come up short.
Can I pour a driveway using bagged concrete instead of ready-mix?
While technically possible for very small driveways, bagged concrete is impractical for most driveway projects. A typical two-car driveway requires about 10 cubic yards of concrete, which equals approximately 450 bags of 80-pound mix. Mixing and pouring that many bags quickly enough to prevent cold joints would require a large crew and several mixers. Ready-mix delivery is far more practical and typically cheaper per cubic yard for any pour over 1 to 2 cubic yards. Bagged concrete is best reserved for small patches and post holes.
How many concrete trucks will I need for my driveway?
A standard concrete mixer truck holds 8 to 10 cubic yards of concrete. Most residential driveways require 1 to 2 truck loads. A typical 640 square foot driveway at 5 inches thick needs about 11 cubic yards with waste, which usually requires 2 truck loads. Order all trucks to arrive within 30 to 45 minutes of each other to ensure a continuous pour. Discuss scheduling with the concrete plant so trucks arrive in the right sequence without long waits that could cause the first load to begin setting.
What is the weight of a concrete driveway?
Cured concrete weighs approximately 150 pounds per cubic foot or about 4050 pounds per cubic yard. A standard 40 x 16 foot driveway at 5 inches thick contains about 267 cubic feet of concrete weighing roughly 40,000 pounds or 20 tons. This weight is important for structural planning, especially if the driveway crosses utility lines, septic systems, or other underground structures. It also affects how much reinforcement is needed and the bearing capacity required from the subgrade soil.
How do I calculate the amount of concrete needed for a project?
Calculate volume in cubic feet (length x width x depth), then divide by 27 to convert to cubic yards. Add 5-10% for waste and spillage. One cubic yard of concrete covers 81 square feet at 4 inches thick.