Concrete Driveway Calculator
A 50 by 12 foot driveway at 4 inches is 7.41 cubic yards and 14.98 short tons. At 10 cubic yards per truck, that is 1 truck.
Last updated . Weight starts at 2,400 kg/m³. The 10 yard truck is a planning assumption. Thickness bands are not a code. No prices.
Pick 4, 5, or 6 inches, or type another thickness. The result is yards, weight, a truck count, and premix bags if you are not ordering ready-mix.
A general slab is the slab calculator. Steel is the rebar calculator and the wire mesh calculator. Stone under the slab is the driveway gravel calculator. Whether 7.41 yards should be bags or a truck is bags versus ready-mix.
Concrete driveway
These bands are planning notes, not a building code. The plan or the local practice sets the thickness.
10 cubic yards per truck is a planning assumption. Change it to the plant’s truck. It is not a legal payload, and this page does not price a short load.
Weight uses 2400 kg/m³, about 2.02 short tons per cubic yard. Steel is not counted here.
Results
How the driveway is counted
Volume is length × width × thickness. Fifty feet by 12 feet is 600.00 square feet. At 4 inches that is 7.41 cubic yards, 200.00 cubic feet, and 5.66 cubic meters. One cubic yard covers 81 square feet at 4 inches, and 600 ÷ 81 is the same 7.41 yards.
Weight is that volume at 2,400 kg/m³. The 14.98 short tons use the unrounded 7.407 yards. Multiplying the rounded 7.41 by 2.02 prints 14.97. The truck count divides the yards by the capacity you type. Ten cubic yards is only a starting assumption.
4, 5, and 6 inches on this driveway
Every row is 50 ft by 12 ft, waste at 0, an 80 lb bag at 0.60 ft³, and a 10 yd³ truck. The bands are planning notes. They are not a required thickness.
| Thickness | Volume | Short tons | Trucks | 80 lb bags |
|---|---|---|---|---|
| 4 in | 7.41 yd³ · 200.00 ft³ | 14.98 | 1 | 334 |
| 5 in | 9.26 yd³ · 250.00 ft³ | 18.73 | 1 | 417 |
| 6 in | 11.11 yd³ · 300.00 ft³ | 22.47 | 2 | 500 |
Worked example
Leave the length at 50 ft, the width at 12 ft, the band on 4 in, waste at 0, the truck at 10, and the bag on 80 lb. Area reads 600.00 ft². Volume reads 7.41 yd³ · 200.00 ft³ · 5.66 m³. Weight reads 13.59 tonnes · 14.98 short tons. Trucks read 1. Bags read 334.
Frequently asked questions
How many yards of concrete for a 12 by 50 driveway?
Leave the length at 50 ft, the width at 12 ft, and the thickness on 4 inches. The area is 600.00 square feet. The volume reads 7.41 yd³, 200.00 ft³, and 5.66 m³. At 2,400 kg/m³ the weight is 13.59 tonnes and 14.98 short tons. 14.98 uses the unrounded 7.407 yards, not 7.41 × 2.02.
How much more is 5 inches or 6 inches?
Switch the thickness band. Five inches is 9.26 yd³, 250.00 ft³, 7.08 m³, and 18.73 short tons, still 1 truck at 10 yards. Six inches is 11.11 yd³, 300.00 ft³, 8.50 m³, and 22.47 short tons, which is 2 trucks. The 4, 5, and 6 inch labels are planning bands, not a code thickness.
How many concrete trucks is that?
The truck box opens at 10 cubic yards. That is a planning assumption, not a legal payload, and it is not the gravel dump-truck page. 7.41 yards is 1 truck. Six inches, 11.11 yards, is 2 trucks. Change 10 to the plant’s truck and the count follows the new capacity. This page does not price a short load.
How many 80 lb bags for this driveway?
200.00 ft³ ÷ 0.60 ft³ = 333.33, which rounds up to 334 bags of 80 lb mix. Five inches is 417 bags. Six inches is 500 bags. A driveway this size is a truck order. The bag line is there for a small pad or a repair, using the same yields as the bag calculator.
What does 10 percent waste do?
Type 10 in the waste box. The 4 inch driveway becomes 8.15 yd³, 220.00 ft³, and 16.48 short tons. It is still 1 truck at a 10 yard capacity. Bags become 367. At 0 percent the volume stays 7.41 yd³. Add the waste yourself. It is not hidden in the 4 inch figure.
Is 4 inches thick enough for a driveway?
Four inches is the worked example and a common residential starting point for light passenger use. Five inches is a step up. Six inches is the heavier band. None of those sentences is a building code. The plan or the local practice sets the thickness. The concrete calculator’s 12 by 24 and 10 by 50 driveway examples stay on that page.
Where do I count rebar or mesh?
Not on this page. Bar weight is the rebar calculator. Sheet count, including the lap, is the wire mesh calculator. A gravel base under the driveway is the driveway gravel calculator. This page is the concrete slab only.