Concrete Price Calculator

Slab Length (feet):

Slab Width (feet):

Slab Thickness (inches):

Concrete Price per Cubic Yard ($):

Waste/Contingency Percentage (%):

Enter values and click 'Calculate' to see the results.

function calculateConcretePrice() { var slabLength = parseFloat(document.getElementById('slabLength').value); var slabWidth = parseFloat(document.getElementById('slabWidth').value); var slabThickness = parseFloat(document.getElementById('slabThickness').value); var concretePricePerYard = parseFloat(document.getElementById('concretePricePerYard').value); var wastePercentage = parseFloat(document.getElementById('wastePercentage').value); var resultDiv = document.getElementById('result'); if (isNaN(slabLength) || isNaN(slabWidth) || isNaN(slabThickness) || isNaN(concretePricePerYard) || isNaN(wastePercentage) || slabLength <= 0 || slabWidth <= 0 || slabThickness <= 0 || concretePricePerYard <= 0 || wastePercentage < 0) { resultDiv.innerHTML = 'Please enter valid positive numbers for all fields.'; return; } // Convert thickness from inches to feet var slabThicknessFeet = slabThickness / 12; // Calculate volume in cubic feet var volumeCubicFeet = slabLength * slabWidth * slabThicknessFeet; // Convert volume from cubic feet to cubic yards (1 cubic yard = 27 cubic feet) var volumeCubicYards = volumeCubicFeet / 27; // Apply waste/contingency percentage var adjustedVolumeCubicYards = volumeCubicYards * (1 + (wastePercentage / 100)); // Calculate total cost var totalCost = adjustedVolumeCubicYards * concretePricePerYard; resultDiv.innerHTML = 'Estimated Concrete Needs & Cost:' + 'Required Volume (without waste): ' + volumeCubicYards.toFixed(2) + ' cubic yards' + 'Adjusted Volume (with ' + wastePercentage.toFixed(0) + '% waste): ' + adjustedVolumeCubicYards.toFixed(2) + ' cubic yards' + 'Total Estimated Concrete Cost: $' + totalCost.toFixed(2) + ''; }

Understanding Your Concrete Price

Estimating the cost of concrete for your project is a crucial step in budgeting. Whether you're pouring a new patio, a garage slab, or a foundation, knowing the volume of concrete required and its associated cost can prevent unexpected expenses.

How the Concrete Price Calculator Works

Our Concrete Price Calculator simplifies this process by taking into account the dimensions of your pour and the local price of concrete. Here's a breakdown of the inputs:

Slab Length (feet): The total length of the area you plan to cover with concrete.
Slab Width (feet): The total width of the area.
Slab Thickness (inches): The desired depth of your concrete slab. This is critical as even a small change can significantly impact volume.
Concrete Price per Cubic Yard ($): This is the cost charged by concrete suppliers per cubic yard. Prices can vary based on your location, the type of concrete mix (e.g., strength, additives), and delivery fees. It's advisable to get quotes from local suppliers.
Waste/Contingency Percentage (%): It's always a good practice to order slightly more concrete than theoretically calculated. This accounts for minor miscalculations, uneven subgrades, spills, or other unforeseen issues. A typical contingency is 5-10%.

The Calculation Process

The calculator first determines the volume of concrete needed in cubic feet by multiplying the length, width, and thickness (after converting inches to feet). This cubic footage is then converted into cubic yards, which is the standard unit for ordering concrete. Finally, the waste percentage is applied to this volume, and the total adjusted volume is multiplied by the price per cubic yard to give you the estimated total cost.

Why Accurate Measurements Matter

Precision in your measurements is key. Overestimating can lead to wasted material and higher costs, while underestimating can result in delays, additional delivery charges for small top-up orders, and potential issues with concrete setting times. Always double-check your dimensions and consider the actual depth of your excavation.

Example Scenario: Driveway Slab

Let's say you're pouring a new driveway that is 20 feet long and 10 feet wide, with a standard thickness of 4 inches. Your local concrete supplier quotes you $120 per cubic yard, and you want to add a 10% waste factor for safety.

Length: 20 ft
Width: 10 ft
Thickness: 4 inches (which is 4/12 = 0.3333 feet)
Volume (cubic feet): 20 ft * 10 ft * 0.3333 ft = 66.66 cubic feet
Volume (cubic yards): 66.66 cubic feet / 27 cubic feet/yard = 2.47 cubic yards
Adjusted Volume (with 10% waste): 2.47 cubic yards * 1.10 = 2.72 cubic yards
Total Estimated Cost: 2.72 cubic yards * $120/cubic yard = $326.40

Using the calculator with these values will quickly provide you with the same accurate estimate, helping you plan your project budget effectively.