Concrete Yard Calculator for Cubic Yards and Truck Loads
Get cubic yards (the unit ready-mix suppliers quote in) plus the exact number of truck loads your project needs — so you can book deliveries with confidence.
Concrete Yard Calculator
Enter project dimensions below — results update instantly. Switch units freely.
Estimates assume typical industry density and waste factors. Always verify with your supplier and local building code before purchasing material.
Why Concrete Yard Calculator Estimates Go Wrong
When a concrete supplier asks ‘how many yards?’ they mean cubic yards — a volume unit. Homeowners often hear this as ‘square yards’ (an area unit) and the conversation goes sideways fast.
A cubic yard of concrete is:
- 27 cubic feet (3 ft × 3 ft × 3 ft)
- Weighs about 4,050 pounds (150 lb/ft³ × 27)
- Covers 81 square feet at 4 inches thick
- Costs $150-180 at 2026 prices
Concrete trucks (‘mixers’) hold 9-11 cubic yards maximum. A standard 10-yd truck covers 810 ft² at 4 inches — roughly a 20 × 40 ft slab. Anything larger means two or more truck deliveries.
How to Calculate Concrete Yard Calculator
Multi-truck pour rules:
- Space trucks 45-60 minutes apart — gives crew time to spread and screed previous load, but before cold joint forms (concrete initial set is ~2 hours)
- Confirm dispatch 48 hours ahead — plants book morning slots quickly; afternoon slots are flexible
- Include a 15-minute buffer between trucks — traffic, wash-out, chute cleaning
- Have a backup plan — if truck 2 is delayed, know your max wait time before you need to call for an accelerator additive or switch strategies
For pours over 8 cubic yards, a concrete pump (boom pump) is often worth the $800-1,200 rental — it places concrete anywhere on the site without the truck driving to each form. Saves 2-4 hours of wheelbarrow work on a basement slab.
Once the Concrete Yard Calculator result looks reasonable, cross-check the next job decision with the Concrete Calculator and the Concrete Slab Calculator. That keeps the quantity, cost, and field assumption tied together before you call a supplier.
Concrete Yard Coverage Table and Material Reference
| Cubic Yards | Cubic Feet | Square Feet Coverage | Cost @ $165/yd³ | Truck Loads |
|---|---|---|---|---|
| 1 yd³ | 27 ft³ | 81 ft² | $165 | 0.1 |
| 3 yd³ | 81 ft³ | 243 ft² | $495 | 0.3 |
| 5 yd³ | 135 ft³ | 405 ft² | $825 | 0.5 |
| 8 yd³ | 216 ft³ | 648 ft² | $1,320 | 0.8 |
| 10 yd³ | 270 ft³ | 810 ft² | $1,650 | 1.0 |
| 15 yd³ | 405 ft³ | 1,215 ft² | $2,475 | 1.5 |
| 25 yd³ | 675 ft³ | 2,025 ft² | $4,125 | 2.5 |
| 50 yd³ | 1,350 ft³ | 4,050 ft² | $8,250 | 5.0 |
Coverage assumes 4 in thickness. Thicker slabs cover proportionally less: 1 yd³ at 6 in covers 54 ft².
| Truck Type | Capacity | Use Case | Typical Access |
|---|---|---|---|
| Mini-mixer (3-axle) | 4-6 yd³ | Small residential, tight access | Can navigate 9-ft driveway |
| Standard ready-mix | 9-11 yd³ | Most pours | Needs 12-ft driveway |
| Front-discharge | 10-12 yd³ | Commercial, no chute reach | Drives into form area |
| Tanker / low-boy | 12-14 yd³ | Highway projects | Highway access only |
Confirm access with dispatcher 48 hr ahead. Low driveways, tight turns, or weight restrictions may require mini-mixer even for 8+ yd³ pours.
Real-World Example Calculations
Single-Truck Pour: 24 × 24 ft Slab @ 5 in
Detached garage floor, standard 10-yd ready-mix truck.
- Length × Width
- 24 × 24 ft
- Thickness
- 5 in
- Truck Capacity
- 10 yd³
Takeaway: Perfect single-truck pour. Book morning slot for best dispatch reliability.
Two-Truck Pour: 40 × 40 ft Basement Slab @ 4 in
New construction basement with rebar grid and vapor barrier.
- Length × Width
- 40 × 40 ft
- Thickness
- 4 in
- Truck Capacity
- 10 yd³
Takeaway: Schedule trucks 45-60 minutes apart. Consider a concrete pump ($900 rental) to place concrete across the 40-ft span without running wheelbarrows.
Three-Truck Commercial: 60 × 80 ft Slab @ 6 in
Light industrial floor with rebar grid and 4,500 psi mix.
- Length × Width
- 60 × 80 ft
- Thickness
- 6 in
- Truck Capacity
- 10 yd³
Takeaway: 9 trucks at 30-min intervals = 4.5-hour pour. Book concrete pump (boom), screed machine, and finishing crew for full day.
Frequently Asked Questions
How many cubic yards in a yard of concrete?
A ‘yard of concrete’ is industry shorthand for one cubic yard — equal to 27 cubic feet or ~4,050 pounds of cured concrete. It covers 81 square feet at 4 inches thick.
How many cubic yards does a concrete truck hold?
Standard ready-mix trucks hold 9-11 cubic yards maximum. Smaller mini-mixers hold 4-6 yd³ for tight-access sites. Commercial front-discharge trucks can hold 10-12 yd³. Loads under 4 yd³ incur a ‘short-load’ minimum fee.
How do I calculate cubic yards of concrete?
Multiply length × width × depth, all in feet, then divide by 27. Convert depth from inches to feet by dividing by 12. Example: 10 × 20 × (4÷12) ÷ 27 = 2.47 cubic yards. Add 10% waste: order 2.72 yd³.
How much does a cubic yard of concrete cost?
In 2026: $150-180 per cubic yard for standard 4,000 psi ready-mix. Short-load fees apply under 4 yd³. Specialty mixes add $20-60 per yd³. Delivery fees apply for sites >20 miles from the plant.
How long does a concrete truck stay on site?
Standard unload allowance is 5-7 minutes per cubic yard (about 60 minutes for a 10-yd truck). Overtime unloading runs $1-3 per minute. Busy plants expect faster unloading; ask about minimum times when booking.
What happens if I order too much concrete?
Excess concrete returns to the plant. Most suppliers credit partial truckloads at 50% of material cost if returned within 30 minutes of placement. Anything beyond that, you pay for the mix and the plant discards it. Always over-order by 5-10% — returning is cheaper than a short-truck emergency.
Can two concrete trucks pour at the same time?
Yes — some large pours use 2-3 trucks simultaneously via a concrete pump. The pump takes feeds from multiple trucks through its hopper and places concrete through a boom hose. This is how stadium floors and basement slabs over 20 yd³ get poured in one continuous operation.