Concrete Calculator

How to Calculate Concrete for Slabs & Walls

Quickly calculate concrete for a slab, square footing, or wall using our concrete calculator or the simple formula below.

Calculate concrete for a slab with our calculator

If you’re working on square or rectangular shapes like slabs, square footings, or walls, using a concrete calculator can save you time and give you accurate results. The concrete calculator above makes it simple. You just enter the length, width, and thickness or height of your slab or wall, select the quantity, and it instantly estimates the concrete volume in cubic feet, cubic yards, or cubic meters. It also shows how many 60 lb or 80 lb bags you’ll need to have the right slab concrete quantity. This tool is perfect for quick, on-site calculations.

Concrete calculator formula for slabs & walls

If you’re wondering how to calculate concrete for slabs and walls, or need help calculating concrete for slabs and walls, it’s all about finding the right volume of concrete required. Whether you’re working on a floor slab or a wall or even a roof slab, knowing how to figure out the concrete needed for slabs and walls helps you avoid ordering too much or too little. This formula shows you how to measure the dimensions and convert them into cubic yards for an accurate order.

Formula:

Cubic Yards = Length (ft) x Width (ft) x Height or Thickness (ft) / 27

Example:

A slab that is 15 feet long, 10 feet wide, and 0.5 feet (6 inches) thick requires:

15 x 10 x 0.5 / 27 = 27 / 75 ≈ 2.78 cubic yards

2. How to Calculate Concrete for Circular Slabs

Easily estimate concrete for round slabs or post hole-style projects using our concrete calculator or the formula below.

Circular slab concrete calculator

If you’re working with round shapes like circular slabs, pads, or even post holes, our concrete calculator can help you get fast and accurate volume estimates. Just enter the radius and depth of your slab or footing into the Circular Slabs section of the calculator, and it will instantly give you the volume in cubic feet, cubic yards, or cubic meters. This tool is ideal for planning patios, round pads, or even multiple round post hole foundations with precision.

Using a formula to calculate circular slab concrete

If you’re trying to learn how to calculate concrete for circular slabs or need tips on calculating concrete volume for circular slabs, read on. Calculating concrete for round slabs requires using the circle’s radius and depth to find the volume in cubic feet, then converting it to cubic yards. Knowing how to figure out the concrete needed for circular slabs ensures you order the right amount for your project without waste.

Formula:

Cubic Yards = π x r2 x Depth (ft) / 27

Example:

For a circular slab with a 6-foot radius and 0.5-foot depth:

3.14 x 62 x 0.5 / 27 = 56.52 / 27 ≈ 2.09 cubic yards

3. How to Calculate Concrete Footings

Use our concrete calculator to quickly estimate concrete for square or rectangular footings of any size.

Concrete footing calculator

When you’re working on footings whether for decks, walls, or buildings accurate volume is essential for structural strength. The Slabs & Walls setting of our concrete calculator lets you input the length, width, and depth of your footing to get an instant estimate in cubic feet, cubic yards, or cubic meters. This is especially helpful when planning multiple footings, saving time and reducing the risk of under- or over-ordering concrete.

Square or rectangular footing calculator formula

Understanding how to calculate concrete footings or calculating concrete volume for footings is important to get stable foundations right. Whether it’s a rectangular or square footing, you can calculate the amount of concrete needed by measuring length, width, and depth and converting those dimensions into cubic yards. Learning how to figure out concrete for footings will help make sure you order the correct quantity of materials for a solid build.

Formula:

Cubic Yards = Length (ft) x Width (ft) x Depth (ft) / 27

Example:

For a footing that is 8 feet long, 2 feet wide, and 1.5 feet deep:

8 x 2 x 1.5 / 27 =24 / 27 ≈ 0.89 cubic yards

4. How to Calculate Concrete for Round Footings

Use the round footing section of our concrete calculator or the formula below to get quick, accurate concrete volume estimates. You can use it to calculate post holes, columns, or round footings.

Concrete calculator for round footings

When calculating concrete for round footings like those used for columns, piers, or post holes it’s important to know the exact volume to avoid waste or shortages. With the Hole, Column, or Round Footings section of our concrete calculator, just enter the diameter and depth of the footing, along with the quantity, and the tool will automatically calculate the volume in cubic feet, cubic yards, or cubic meters. It’s perfect for estimating concrete for single or multiple round footings in seconds.

Formula to calculate round footings

When calculating concrete for round footings or learning how to calculate concrete volume for round footings, the process involves measuring the radius and depth of the footing. By multiplying the area of the circle by the depth, you can find the volume in cubic feet, then convert it to cubic yards. Knowing how to figure out concrete requirements for round footings helps you order precisely and efficiently.

Formula:

Cubic Yards = π x r2 x Depth (ft) / 27

Example:

A round footing with a radius of 1.5 feet and depth of 2 feet requires:

3.14 x 1.52 x 2 / 27 = 14.13 / 27 ≈ 0.52 cubic yards

5. How to Calculate Concrete for Curb & Gutter

Use the Curb and Gutter setting of our concrete calculator to quickly figure out how much concrete you need. You can also use the formula below.

Using our concrete calculator for curbs & gutters

If you’re pouring concrete for curbs and gutters, our concrete calculator makes it easy. Just enter the curb depth, gutter width, curb height, flag thickness, and total length into the Curb and Gutter section. The calculator will give you the volume in cubic feet, cubic yards, or cubic meters. It’s perfect for calculating concrete for sidewalks, decks, driveways, parking lots, and street edges all without doing the math yourself.

Curb & gutter formula for concrete calculation

If you need help calculating concrete for curb and gutter or want to learn how to calculate concrete for curbs and gutters, this section will guide you through the steps. Since curbs and gutters are long and narrow, calculating the concrete volume means measuring length, width, and depth, then converting those dimensions into cubic yards. Knowing how to figure out concrete amounts for curb and gutter will ensure you buy just the right amount for your project.

Formula:

Cubic Yards = Length (ft) x Width (ft) x Depth (ft) / 27

Example:

A curb that is 100 feet long, 1.5 feet wide, and 0.5 feet deep needs:

100 x 1.5 x 0.5 / 27 = 75 / 27 ≈ 2.78 cubic yards

6. How to Calculate Concrete for Stairs

Use the Stairs section of our concrete calculator to quickly figure out how much concrete your steps need.

Concrete calculator for stairs

Pouring concrete stairs? Our concrete calculator makes it easy. In the Stairs section, just enter the rise, run, width, number of steps, and platform depth. The calculator will instantly estimate the total volume of concrete in cubic feet, cubic yards, or cubic meters. It’s perfect for calculating concrete for small sets of steps, full staircases, or stairs with platforms.

Formula to calculate concrete for stairs

If you’re wondering how to calculate concrete for stairs or need tips on calculating concrete volume for stairs, this section is for you. Stairs are made up of multiple steps, so calculating concrete means figuring out the volume of one step and multiplying by the total number of steps. Learning how to figure out concrete requirements for stairs helps you get the right amount of concrete for a safe and sturdy staircase.

Formula:

Cubic Yards = Number of Steps x Length (ft) x Width (ft) x Height (ft) / 27

Example:

For 10 steps, each 3 feet long, 4 feet wide, and 0.5 feet tall:

10 x 3 x 4 x 0.5 / 27 = 60 / 27 ≈ 2.22 cubic yards

7. How to Calculate Concrete Yardage

If you’ve been asking how do I calculate concrete yards or how to calculate concrete yardage for a slab, footing, or wall, the process is simple. Just measure the length, width, and depth in feet, then use our concrete calculator to do the math for you. It instantly gives you the volume in cubic yards, so you know exactly how much concrete you will need without guessing and waste.

Formula for Concrete Yard Calculation:

Cubic Yards = Length (ft) x Width (ft) x Depth (ft) / 27

Example:

For a slab 20 feet long, 15 feet wide, and 6 inches (0.5 feet) deep:

20 x 15 x 0.5 / 27 = 150 / 27 ≈ 5.56 cubic yards

8. Calculating Concrete Cost

Learn how to calculate concrete cost by factoring in materials, delivery, and labor.

When planning a project, it’s important to know how to calculate the cost of concrete so you can stay on budget. Concrete is typically made from a mix of cement, aggregate (gravel and sand), and water. You can buy the raw materials separately or order pre-mixed concrete. To get an accurate cost estimate, first calculate how many cubic yards of concrete you need using a concrete calculator. Then, multiply that by the price per yard of concrete. If you’re mixing it yourself, you’ll also need to price out each component: cement bags, sand, gravel, and water (or additives).

Don’t forget to include delivery fees, labor costs, and any extra equipment or prep work. This gives you the full cost not just for the concrete, but for getting it placed and finished.

Steps to Calculate Concrete Cost:

• Calculate the required concrete volume (in cubic yards).
• Multiply by the cost per yard of ready-mix concrete or calculate the cost of individual materials if mixing on-site.
• Add delivery charges (if applicable).
• Include labor, prep, or finishing costs.

Example (Ready-Mix):

You need 5 cubic yards of concrete at $120 per yard, plus $75 delivery:

5 x 120 = $600 + $75 = $675 total cost

Example (Mixing On-Site):

For 1 cubic yard:

• Cement = $150
• Sand = $50
• Gravel = $40
• Water/Additives = $10

Total = $250 (materials only)

Add labor and equipment for final estimate.

10. How to Calculate Concrete Price (For Contractors)

If you’re a contractor wondering how to calculate concrete price for your work, you need to combine material, labor, equipment, and overhead costs. Learning how contractors price concrete work involves estimating the volume of concrete, multiplying by material cost, then adding labor and other expenses. Knowing how to set a concrete price ensures your project stays profitable while being competitive.

Example:

• Material: 4 yards × $100/yard = $400
• Labor: 3 hours × $50/hour = $150
• Equipment: $50
• Profit margin: 20% on total costs

Total before profit = 400 + 150 + 50 = 600

Profit = 600 × 0.20 = 120

Final price = 600 + 120 = $720

11. How to Calculate Concrete Mix

If you want to know how to calculate concrete mix or figure out the right amounts of cement, sand, gravel, and water, this section is for you. Calculating a concrete mix involves understanding typical mix ratios and scaling them up based on the volume of concrete needed. Learning how to figure out concrete mix proportions ensures your concrete is strong and durable.

Typical Mix Ratio:

• • Cement: 1 part
  • Sand: 2 parts
  • Gravel: 3 parts