Calculated result
6.25yd³
Ready-mix order
Formula
CONC-DRIVE-001L × W × D × quantity ÷ 27 × (1 + waste) → ready-mix order
150 ft³
Net volume
5.56 yd³
Net volume
0.63 loads
10 yd³ truck-load equivalent
Concrete calculator
Concrete driveway calculator
Driveway volume, ready-mix order and bag-equivalent estimate with visible allowance.
By Feroz Sheikh · Formula CONC-DRIVE-001 v1.1.0 · Tested formula
Formula
CONC-DRIVE-001v1.1.0Project inputs
Enter your measurements. Switching units converts the same project, including coverage and unit rates. Package yields keep the unit printed beside each field.
Refine measurements and rates at any time. Your current values are included in the material-list PDF.
Planning estimate, not engineering advice. Confirm site measurements and product specifications. Calculation limits.
Bag table · waste in
Counts round up. A cubic yard is 45 of 80 lb, 60 of 60 lb, 72 of 50 lb, 90 of 40 lb.
| Bag | Count |
|---|---|
| 40 lb | 550 |
| 50 lb | 440 |
| 60 lb | 367 |
| 80 lb | 275 |
This calculator returns driveway slab volume, waste and a rounded ready-mix order from length, width and thickness. Formula CONC-DRIVE-001 v1.1.0. Base, mesh and joints stay separate lines. Drop the yards into an estimate. It does not size the slab.
- Measure the finished driveway length and average width.
- Enter thickness from the approved project requirements.
- Use the rounded ready-mix quantity as a starting point for a supplier quote.
Size chart
Driveway slab chart (5 in, 10% waste)
Base, mesh and joints stay separate lines. Thickness comes from the approved design.
| Drive | Primary | Check |
|---|---|---|
| 20 × 10 ft | 3.5 yd³ | 83.33 ft³ |
| 24 × 12 ft | 5 yd³ | 120 ft³ |
| 30 × 12 ft | 6.25 yd³ | 150 ft³ |
| 40 × 12 ft | 8.25 yd³ | 200 ft³ |
Metric example — 9 × 3.6 m drive. A 9 × 3.6 m driveway at 100 mm with 10% waste orders 3.6 m³.
- Volume method. Length × width × depth, or cylinder volume for holes. Ready-mix is still ordered by volume. Concrete Network — volume calculation guidance
- Bag yield. Use the yield printed on the sack. Bags belong on small pads and post holes. Sakrete — estimating bagged concrete jobs
Add your project costs
Enter supplier prices and any labour, equipment or delivery costs. Pick a currency — badges, inputs, and totals follow.
Enter your supplier’s ready-mix concrete rate in the selected unit. Add delivery, pumping, short-load fees and placing labour as separate project costs. For GCC projects, select QAR, AED, SAR, KWD, OMR or BHD and enter local supplier rates.
How this calculator works
A transparent concrete driveway takeoff.
Feroz SheikhWritten by Feroz Sheikh · founder
Use finished driveway dimensions and specified thickness to estimate concrete volume before a ready-mix purchase allowance is applied.
A driveway takeoff is thickness plus the real width, not a 4 in patio default. Reinforcement, base and control joints stay off this volume line on purpose.
Worked example. Example: a 30 ft × 12 ft driveway at 5 in depth contains about 5.56 yd³ before allowance; the tool rounds the 10% order to 6.25 yd³.
See the example inputs and calculated result
This separate example uses the calculator's starting values in imperial units. It stays unchanged when you edit the tool above. Example rates, yields and dimensions are assumptions, not recommendations for your project.
| Input | Example value |
|---|---|
| Driveway length | 30 ft |
| Driveway width | 12 ft |
| Concrete depth | 5 in |
| Waste factor | 10 % |
Example result: Ready-mix order — 6.25 yd³.
L × W × D × quantity ÷ 27 × (1 + waste) → ready-mix order
Use the labelled units above when reproducing this example. To work in metric, switch the calculator to Metric; applicable measurements are converted, while product-specific units remain labelled.
- 1. Measure the finished driveway length and average width.
- 2. Enter thickness from the approved project requirements.
- 3. Use the rounded ready-mix quantity as a starting point for a supplier quote.
Field notes that change the number
- Residential drives are often 4–6 in. Confirm the spec; this page does not pick it.
- Flares, aprons and sidewalk crossings are separate rectangles.
- Base rock is a gravel takeoff, not extra concrete.
Common mistakes
- Using interior-slab 4 in thickness on a vehicle drive.
- Averaging a tapering width instead of splitting the flare.
- Hiding wire mesh or rebar in the yard price.
Need the broader workflow? Read the concrete planning guide.
How-to: Concrete slab cost: build an estimate from supplier quotes
Questions
Questions about concrete driveway
Does this set driveway thickness?
No. Thickness, reinforcement, base, drainage and local requirements must be independently verified.
Does it deduct irregular sections?
Use average width for a simple preliminary estimate, or divide complex geometry into separate sections.
How much concrete for a 30x12 driveway?
A 30 × 12 ft drive at 5 in with 10% waste orders 6.25 yd³. Base, mesh and joints stay separate lines.
Is 4 inches thick enough for a driveway?
Often 4–6 in. This tool does not size the slab. Thickness comes from the approved design and local practice.
What is the formula ID?
This concrete driveway calculator publishes formula CONC-DRIVE-001, version 1.1.0. The ID stays on the result and on the estimate line.