Ordering ready mix concrete sounds easy until someone asks, “What slump do you want?” and suddenly you feel like you accidentally enrolled in civil engineering night school. The good news: you do not need to become a concrete professor to place a smart order. You only need to know your project size, the mix requirements, the delivery conditions, and the questions your ready mix supplier will ask.
Ready mix concrete is concrete batched at a plant and delivered to your site in a truck while it is still fresh, workable, and ready to place. It is commonly used for driveways, patios, sidewalks, garage slabs, footings, pool decks, commercial floors, curbs, and foundations. Unlike mixing bag after bag in a wheelbarrow until your arms file a complaint, ordering ready mix concrete lets you pour larger projects faster, with more consistent quality and less backbreaking guesswork.
This guide breaks the process into five practical steps. You will learn how to calculate cubic yards, choose the right concrete mix, schedule delivery, prepare your jobsite, and avoid the classic mistakes that turn a smooth pour into a driveway-sized panic attack.
Step 1: Define the Project Before You Call
Before you order ready mix concrete, get clear on exactly what you are building. A patio, driveway, garage slab, sidewalk, footing, or retaining-wall foundation may all use concrete, but they do not always need the same mix. A backyard walkway does not carry the same load as a driveway that will host trucks, trailers, and your neighbor’s mysteriously heavy boat.
Write Down the Basics
Have this information ready before calling a concrete supplier:
- Project type: patio, driveway, sidewalk, slab, footing, wall, curb, or foundation
- Project location and delivery address
- Length, width, and thickness of the pour
- Whether the concrete will be reinforced with rebar, wire mesh, or fibers
- Whether trucks can reach the pour area directly
- Whether you will use a chute, wheelbarrows, buggy, conveyor, or concrete pump
- Any local code, permit, engineer, or contractor specifications
If you have drawings or a project specification, keep them nearby. For structural work, do not guess. Footings, foundations, suspended slabs, commercial floors, and engineered projects should follow the approved plans. For homeowner projects, your ready mix supplier can often help you select a common residential mix, but they are not a substitute for a structural engineer when the project carries serious loads.
Choose a Nearby Ready Mix Supplier
Location matters. Fresh concrete is a perishable material. Heat, time, traffic, and long hauls can reduce workability before the truck reaches your forms. A nearby supplier usually means better timing, lower delivery risk, and fewer surprises. When comparing ready mix companies, ask about service area, minimum order size, short-load fees, delivery charges, truck availability, Saturday pours, and whether they offer technical advice for small residential jobs.
Price is important, but the cheapest concrete is not always the cheapest pour. A reliable supplier that arrives on schedule with the right mix can save more money than a bargain load that shows up late, stiff, or unsuitable for the job. Concrete waits for no one. It has the patience of a toddler in a checkout line.
Step 2: Calculate How Many Cubic Yards You Need
Ready mix concrete is ordered by the cubic yard in the United States. One cubic yard equals 27 cubic feet. The basic formula is simple:
Length × Width × Thickness = Cubic Feet
Then divide by 27 to convert cubic feet into cubic yards.
Example: 10-Foot by 12-Foot Patio
Let’s say you are pouring a patio that is 10 feet long, 12 feet wide, and 4 inches thick. First, convert the thickness to feet. Four inches equals 0.333 feet.
10 × 12 × 0.333 = 39.96 cubic feet
39.96 ÷ 27 = 1.48 cubic yards
That means the slab needs about 1.5 cubic yards before allowing for waste, uneven subgrade, spillage, or slight form movement.
Use the 4-Inch Slab Shortcut
For a 4-inch-thick slab, one cubic yard covers about 81 square feet. That gives you a handy shortcut:
Square footage ÷ 81 = cubic yards for a 4-inch slab
If your slab is 200 square feet at 4 inches thick, the estimate is:
200 ÷ 81 = 2.47 cubic yards
Round with care. Concrete is not something you want to run short on halfway through a pour. A cold joint, where fresh concrete meets concrete that has already started setting, can weaken the look and performance of the slab. Ordering another truck later is usually far more expensive than ordering a little extra at the start.
Add a Waste Factor
Most small projects should include an additional 5% to 10% for waste. Some suppliers and calculators recommend 10% to 15%, especially when the subgrade is uneven, forms are irregular, excavation is rough, or the project has deepened edges and thickened footings. A neat rectangular patio over a well-prepared base may need less extra than a hand-dug walkway that looks like it was shaped by a raccoon with ambition.
For the 1.48-yard patio above, adding 10% gives:
1.48 × 1.10 = 1.63 cubic yards
You might order 1.75 cubic yards if the supplier allows quarter-yard increments, or 2 yards if that fits their minimum and pricing structure. Ask about minimum order quantities and short-load charges because many ready mix companies charge extra for small loads.
Step 3: Choose the Right Concrete Mix
When people talk about “ordering concrete,” they often focus only on yards. Quantity matters, but mix design matters just as much. The right concrete mix should match the project’s strength needs, placement method, exposure conditions, and finishing requirements.
Compressive Strength: PSI
Concrete strength is commonly specified in PSI, or pounds per square inch. For many residential flatwork projects, 3,000 to 4,000 PSI concrete is common, but requirements vary by local code, climate, soil, and use. Driveways often need more strength than patios because vehicles create heavier loads. Commercial slabs, structural footings, and engineered work may require specific strengths listed in the plans.
When ordering, you might say: “I need 4 cubic yards of 4,000 PSI concrete for a residential driveway.” That sentence alone makes you sound like you know what you are doing, which is always helpful when standing next to a giant spinning truck.
Slump: Workability Without Soup
Slump measures how workable or fluid fresh concrete is. A lower slump is stiffer; a higher slump is wetter and easier to place. For many general applications, a slump around 3 to 5 inches is common, though walls, pumped concrete, heavily reinforced areas, and specialty mixes may need different ranges.
Do not solve every placement problem by adding water at the jobsite. Extra water can reduce strength, increase shrinkage, encourage cracking, and weaken durability. If the mix needs more workability, ask the supplier about water-reducing admixtures or an approved slump adjustment. In other words, do not turn your driveway into concrete soup and hope it becomes steak later.
Aggregate Size
Aggregate is the sand, gravel, or crushed stone in the mix. Common residential ready mix often uses 3/4-inch nominal maximum aggregate, but the right size depends on slab thickness, reinforcement spacing, pump line requirements, and finish. Aggregate must be small enough to flow around rebar, mesh, forms, and tight spaces.
For thin slabs, decorative work, narrow forms, or pumped mixes, the supplier may recommend a smaller aggregate. For standard driveways and patios, a typical local mix may already be suitable.
Air Entrainment
If your concrete will be exposed to freeze-thaw cycles, ask about air-entrained concrete. Air entrainment creates tiny, controlled air bubbles that help concrete resist damage from freezing and thawing. This is especially important in colder regions, exterior slabs, driveways, sidewalks, steps, and any concrete exposed to deicing salts.
Interior slabs in climate-controlled spaces may not need air entrainment unless specified. Exterior concrete in northern climates usually deserves the conversation.
Admixtures and Add-Ons
Admixtures modify how concrete behaves. Depending on conditions, your supplier may recommend:
- Accelerator: helps concrete set faster in cold weather
- Retarder: slows set time in hot weather or long placements
- Water reducer: improves workability without simply adding water
- Fiber reinforcement: helps control plastic shrinkage cracking in some slabs
- High-range water reducer: increases flow for certain placements
- Color: used for decorative concrete, if ordered correctly and consistently
Tell the supplier how you plan to place the concrete. Pumped concrete may need a pumpable mix. A steep driveway may need a stiffer mix. A stamped patio may need enough workability and finishing time to place, screed, float, stamp, and texture before the slab gets stubborn.
Step 4: Schedule the Delivery Like a Pro
Once you know your quantity and mix, schedule delivery. Do not wait until the morning of the pour and expect a truck to appear like pizza. Concrete plants manage batching, dispatch, truck spacing, driver availability, traffic, weather, and other jobs. Give as much advance notice as possible, especially during busy building seasons.
Information to Provide When Ordering
When placing the order, give the dispatcher:
- Your name, phone number, and jobsite contact
- Exact delivery address and directions
- Quantity in cubic yards
- Concrete strength in PSI
- Desired slump
- Air entrainment requirements
- Aggregate size, if specified
- Admixtures or fiber requests
- Delivery date and preferred start time
- Placement method: chute, pump, buggy, wheelbarrow, conveyor, or bucket
- Truck access details and any hazards
- Washout location
- Whether the order is firm or will-call
Ask About Truck Spacing
If your project needs multiple trucks, discuss truck spacing. Too much time between trucks can create cold joints. Too little time can leave trucks waiting while your crew scrambles. Waiting time may cost extra. The right pace depends on crew size, placement method, distance from truck to forms, weather, and finishing plan.
A small patio with direct chute access might place quickly. A backyard slab where concrete must be moved by wheelbarrow through a narrow gate will be much slower. Be honest with the supplier. Dispatchers would rather plan correctly than listen to you pant into the phone while four wheelbarrows, one cousin, and a shovel named “Old Reliable” try to unload six yards.
Confirm the Order
Call the day before the pour to confirm date, time, quantity, mix, address, directions, and site contact. Confirm again if weather changes. Hot weather, rain, freezing temperatures, or high winds can affect placement and finishing. For hot weather, ask whether a retarder, chilled water, or schedule adjustment makes sense. For cold weather, ask about heated water, accelerators, blankets, and protection after placement.
Step 5: Prepare the Site Before the Truck Arrives
The best concrete order in the world cannot rescue a messy jobsite. Once the truck is there, the clock is not your friend. Be ready before the drum starts turning at your curb.
Prepare Forms, Base, and Reinforcement
Set forms to the correct line, grade, and thickness. Compact the subgrade. Add and compact base material where needed. Install reinforcement according to the plan. Make sure rebar or mesh is supported so it ends up in the concrete, not flattened underneath like a sad metal pancake.
Check slopes for drainage. Patios and driveways usually need positive drainage away from buildings. Confirm that forms are braced well. Wet concrete is heavy, and weak forms can bulge or fail. If the forms move during the pour, your “simple slab” may become modern art.
Plan Access and Safety
Concrete trucks are large and heavy. Make sure the driveway, street, or access path can handle the truck without cracking pavement, sinking into soft ground, damaging septic areas, clipping tree limbs, or turning your lawn into pudding. If the truck cannot reach the forms, plan a pump, buggy, conveyor, or wheelbarrow route.
Have personal protective equipment ready: gloves, rubber boots, long sleeves, eye protection, and clean water for washing skin. Fresh concrete is caustic and can cause burns. Treat it with respect, not with “I’ll just rinse off later” optimism.
Have the Right Crew and Tools
At minimum, be ready with screed boards, shovels, rakes, come-alongs, floats, edgers, jointers, bull float, finishing tools, curing materials, and a washout plan. Match the crew size to the project. A 2-yard patio may be manageable for a small team. A 10-yard driveway with a long wheelbarrow route is not the time to discover your friends only volunteered for moral support.
Check the Delivery Ticket
When the truck arrives, check the delivery ticket before discharge. Confirm the quantity, mix code, PSI, slump, air entrainment, admixtures, and time batched. If something looks wrong, stop and call the supplier immediately. Once concrete is on the ground, arguments become much heavier.
For specification work, testing may include slump, temperature, air content, unit weight, and strength cylinders. For small residential work, formal testing is less common, but checking the ticket and observing consistency are still smart habits.
Sample Ready Mix Concrete Order Script
Here is a simple script you can adapt:
“Hi, I need to order ready mix concrete for a residential driveway. The pour is 18 feet by 24 feet at 5 inches thick, so I estimate about 6.7 cubic yards and would like to order 7.5 yards. I need a 4,000 PSI exterior mix with air entrainment, around a 4-inch slump, using standard aggregate unless you recommend otherwise. We will place by chute from the street, and the truck can back up to the forms. Delivery address is 123 Maple Street. We would like the first truck at 8:00 a.m. on Friday. Can you confirm availability, pricing, short-load or waiting-time fees, and whether this mix is appropriate for our area?”
That script covers quantity, strength, air, slump, placement, access, timing, and confirmation. It also invites the supplier to flag problems before the pour, which is exactly what you want.
Common Mistakes When Ordering Ready Mix Concrete
Ordering Too Little
This is the most painful mistake. Always measure actual site conditions, not just the drawing. Uneven subgrade, over-excavation, thickened edges, and form distortion can increase volume. Add a reasonable waste factor.
Ignoring Truck Access
A ready mix truck is not a compact car. Confirm overhead clearance, driveway strength, turning room, slope, soft ground, and distance to the pour. If access is poor, arrange a pump or other placement method before delivery day.
Adding Water Without Approval
Water makes concrete easier to move, but too much water can weaken the slab and increase cracking. Ask the driver or supplier what adjustments are allowed. A water reducer may be a better solution than turning the mix into gray pancake batter.
Starting Too Late in Hot Weather
Heat speeds up slump loss and setting. Morning pours are often easier in summer. Shade, preparation, retarding admixtures, and enough crew can make the difference between a clean finish and a broom-finished wrestling match.
Forgetting Curing
Finishing is not the end. Concrete needs proper curing to develop strength and durability. Use curing compound, wet curing, plastic sheeting, or other methods suitable for the project and weather. A slab that dries too fast can crack, dust, or weaken at the surface.
Real-World Experience: What Ordering Ready Mix Concrete Teaches You Fast
The first lesson of ordering ready mix concrete is that concrete rewards people who prepare and humbles people who “wing it.” On paper, a small slab looks innocent. You measure the area, call the supplier, and wait for the truck. Easy. Then the truck arrives, the chute swings out, and suddenly every missing tool, loose form board, blocked gate, and absent helper becomes the star of the show.
One of the most useful experiences is learning to measure the actual jobsite instead of trusting assumptions. A patio that was “about four inches thick” may become five inches in places because the base was not level. A driveway may need thickened edges. A walkway may have curves that quietly add volume. The tape measure tells the truth. The ground negotiates. Your concrete order should respect both.
Another big lesson is that the supplier is part of your team. A good dispatcher or sales rep has heard every version of “I just need some concrete” and can help translate your project into a practical order. When you clearly describe the project, access, weather, and placement method, they can recommend a more workable mix, better delivery time, or a safer truck plan. If you are pumping concrete, say so. If you are pushing wheelbarrows 90 feet uphill, definitely say so, and maybe apologize to your back in advance.
Timing also becomes real very quickly. Concrete does not care that someone is late with the bull float. It does not care that your cousin stopped for coffee. Once discharge starts, the crew needs to place, screed, consolidate, edge, joint, float, finish, and cure in sequence. The smoother the setup, the calmer the pour. Experienced crews stage tools in order of use, assign jobs before the truck arrives, and keep communication simple. Nobody wants a committee meeting while three yards of concrete are sliding toward the wrong corner.
Jobsite access is another underrated detail. Many homeowners imagine the truck will simply pull right up to the slab. Sometimes it can. Sometimes tree branches, soft soil, overhead wires, narrow driveways, septic fields, fresh asphalt, or tight turns say otherwise. Planning the route ahead of time avoids stress and damage. If the truck must stay on the street, calculate whether the chute reaches. If not, arrange wheelbarrows, a buggy, or a pump. The time to discover a chute is too short is not when the driver asks, “Where do you want it?”
Finally, ordering ready mix concrete teaches respect for the finish and cure. Many people focus on getting the concrete delivered, but the slab’s long-term performance depends on what happens after it hits the forms. Avoid overwatering. Cut or tool joints at the right time. Protect the slab from rapid drying, freezing, rain, pets, leaves, and curious footprints. The best pours feel almost boring because everything was ready. In concrete work, boring is beautiful. Drama belongs on television, not in your driveway.
Conclusion
Learning how to order ready mix concrete is mostly about asking the right questions before the truck arrives. Define the project, calculate cubic yards carefully, choose a mix that fits the application, schedule delivery with realistic site information, and prepare the jobsite like the concrete is arriving earlybecause sometimes it does.
The five-step process is simple, but each step matters. The right quantity prevents cold joints and emergency reorders. The right mix improves strength, durability, workability, and finish. The right schedule keeps trucks, crews, and tools moving in rhythm. The right preparation turns delivery day from chaos into a controlled pour.
Concrete is heavy, fast-moving, and wonderfully unforgiving. Treat the order like part of the construction process, not an errand. Measure twice, call clearly, confirm the details, and have your crew ready. Your future slab will thank you silently for decades, which is about as emotional as concrete gets.
