Concrete Slab Weight Calculator

Welcome to our Concrete Slab Weight Calculator, a free and easy-to-use online tool that allows you to quickly estimate the weight of your concrete slab projects.

By providing the dimensions of your slab, including length, width, and thickness, our calculator will give you an accurate estimate of the weight in kilograms.

This information is crucial for ensuring structural safety, accurate material estimation, and efficient transportation.

In this guide, you’ll learn how to use the calculator effectively and discover the importance of knowing the weight of your concrete slab for various construction projects such as foundations, floors, driveways, retaining walls, and patios. Let’s get started

How to Use the Concrete Slab Weight Calculator

Our user-friendly Concrete Slab Weight Calculator provides an efficient way to estimate the weight of a concrete slab for your projects. Follow these simple steps to use the calculator:

  1. Enter the length of the slab in meters (m).
  2. Enter the width of the slab in meters (m).
  3. Enter the thickness of the slab in meters (m).
  4. Click the “Calculate” button to get the estimated weight of your concrete slab.

The calculator uses the standard concrete density of 2400 kg/m³ to compute the weight based on the dimensions you provide.

Concrete Slab Weight Calculator

Why Knowing the Weight of Your Concrete Slab Matters

Understanding the weight of your concrete slab is crucial for several reasons:

  • Safety: Ensuring that the supporting structures can safely bear the weight of the concrete slab is essential for preventing structural failures and accidents.
  • Material estimation: Accurate weight calculations help you estimate the amount of concrete mix needed for your project, avoiding wastage and additional costs.
  • Transportation: Knowing the weight of your concrete slab helps you choose the right transportation method and equipment, such as trucks and cranes, to safely and efficiently move the materials on site.

Using the Calculator for Different Concrete Projects

The Concrete Slab Weight Calculator is a versatile tool that can be used for various concrete projects, such as:

  • Foundations
  • Floors
  • Driveways
  • Retaining walls
  • Patios

For complex or irregularly shaped slabs, you might need to break down the slab into smaller rectangular sections and calculate the weight for each section separately. Then, simply add up the weights of all sections to obtain the total weight of the concrete slab.


weight of concrete per square foot

How do you calculate the weight of a concrete slab?

To calculate the weight of a concrete slab, multiply its length, width, and thickness to find its volume, then multiply the volume by the concrete’s density (typically 2400 kg/m³). For example, Weight = Length (m) x Width (m) x Thickness (m) x 2400 kg/m³.

How much does a slab of concrete weigh per m3?

A slab of concrete weighs approximately 2400 kg per cubic meter (m³) as the standard density of concrete is around 2400 kg/m³. The actual weight may vary based on the specific concrete mix used.

How much does a 600×600 concrete slab weigh?

A 600×600 concrete slab’s weight depends on its thickness. Calculate the weight using the formula: Weight = 0.6m x 0.6m x Thickness (m) x 2400 kg/m³.

How heavy is 1 cubic meter of concrete?

One cubic meter of standard concrete typically weighs around 2400 kg. The actual weight may vary depending on the specific mix and materials used in the concrete.

How many 20kg bags of concrete in a cubic metre?

Approximately 60-65 bags of 20kg concrete are needed to fill a cubic meter, depending on the mix and desired consistency. Always check the manufacturer’s guidelines for accurate quantities.

How thick should a concrete slab be?

The thickness of a concrete slab depends on its purpose and the load it needs to support. Common thicknesses range from 100mm (4 inches) for residential projects to 150mm (6 inches) or more for heavy-duty applications. Consult a structural engineer for project-specific recommendations.


Understanding the weight of a concrete slab is essential for various aspects of construction projects, such as structural safety, material estimation, and transportation planning.

Our Concrete Slab Weight Calculator offers a user-friendly and convenient way to calculate the weight of your concrete slab based on its dimensions.

Keep in mind that factors such as the type of concrete mix, reinforcement materials, and environmental conditions can influence the actual weight of the slab. For accurate results and project-specific advice, always consult with a professional engineer or contractor.

Author Profile

Mark Cullen
Mark Cullen
I have many qualifications and certificates in construction, such as City & Guilds, CPCS and CITB. These are the highest standards of training and competence in the industry. Whether you need help with plumbing, carpentry, bricklaying or any other trade, I’m here to help you succeed.