8 Best Free Online Concrete Slab Calculator Websites

Here is a list of the best free online concrete slab calculator websites. A concrete slab calculator helps you determine the volume of the structure and thus the amount of concrete required to make that structure. If you are planning to build a slab or any concrete structure then these calculators can help you determine the material and cost for the same.

This post covers 8 free websites with concrete calculators. These calculators take the dimensions as input and give the concrete volume. Some calculators can do this for various types of structures. You can select a structure and the measurement unit of your choice. As per the input, the calculator shows the cement bags or concrete bulk you need to build the structure. Some of these calculators can also determine the cost based on the local pre-mix price.

My Favorite Online Concrete Slab Calculator

Civil-Engineering-Calculators.com is my favorite concrete slab calculator website. This website has 4 commonly used grades of concrete mix. For the given dimensions and selected grade, it breaks down the amount of cement, sand, and aggregate required to build the concrete slab.

Check out our lists of the best free Area Calculator Websites, Floor Plan Software For Windows, and Bridge Design Software For Windows.

Civil-Engineering-Calculators.com

Civil-Engineering-Calculators.com offers a free online concrete calculator for slabs. It works in metric and imperial systems and includes four Grade of Concrete. You can add the dimensions of the concrete and pick the concentrate grade. The calculator calculates the total volume of the cement concrete. Next to that, it shows the amount of cement, sand, and aggregate needed to make that concrete. Below that, it gives a breakdown of each calculation with formulas and calculation steps.

Highlights:

This calculator calculates the cement for making concrete slabs.
It can calculates the volume of the concrete structure.
It shows the amount of cement, sand, and aggregate needed.
Supports the metic and imperial unit systems.

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OmniCalculator.com

OmniCalculator has a free online concrete calculator. This calculator takes the dimensions as input and estimates the amount of concrete you are going to need for that. From the dimensions, it calculates the area and space. Then it finds how many bags of cement are required for that space, accounting for concrete density, weight, and spillage. If you enter the cement bag weight that is being sold in the market, it can also calculate how many cement bags you are going to need. Also, this calculator can estimate the cost of the cement needed, based on the price per bag.

Highlights:

This calculates the amount of cement needed to make the concrete slab.
It can estimate the cement bags needs for making multiple concrete slabs.
It calculates the price of the cement needed for a given price per cement bag.
Offers similar concrete calculators for columns, tubes, etc.
Option to share the calculation online and copy the outcomes in one click.

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GigaCalculator.com

GigaCalculator.com offers a free online concrete calculator for Rectangular Slab, Wall, Footer, Square Column, Round Column, Steps, Curb & Gutter. This calculator works in the imperial as well as the metric systems. You can select a measurement system and then select the structure for which you want to calculate the converted amount. Selecting a structure loading the respective fields to add the dimensions. After then the calculator calculates the volume of the selected structure. Below that it has an optional material option where you can get the amount of concrete needed in bags or bulk. And if you add the bag size and price per bag, it can also estimate the number of bags needed along with the price for making the concrete structure.

Highlights:

This calculator can calculate the amount of cement needed for Rectangular Slab, Wall, Footer, Square Column, Round Column, Steps, Curb & Gutter.
It can calculate the volume of one or more concrete structures together.
Optional material and cost estimation for given bag size and price.
Option to share the calculation online including embed code.

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Calculator.net

Calculator.net offers a free online concrete calculator for Slabs, Square Footings, Walls, Holes, Columns, Round Footings, Circular Slabs, Tubes, Curbs, Gutter Barriers, and Stairs. There are separate calculators for similar structures. You can pick a calculator for the structure you want to make. Then insert the dimensions of the structure along with the number of structures you need. Based on the input, the calculator estimates the total amount of cement needed (kg/lbs). It also calculates the total cement bags(60-lb bags and 80-lb) you need.

Highlights:

This website offers separate calculators for different types of structures.
It can estimate the cement bags needs for making multiple concrete slabs/structures.
It calculates the volume of the slab or other selected structures.
It estimates the weight (cement) needed with a density of 2,130 kg/m3.
Shows the number of 60-lb bags and 80-lb bags needed for making the slab or other selected concrete structure.

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CalculatorSoup.com

CalculatorSoup.com is a free website with a wide collection of online calculators. This calculator can help you calculate the cost of making a concrete Square Slab, Round Slab, Wall, Footer, Square Column, Round Column, Steps, Curb & Gutter. To do that, you have to start by selecting the structure that you want to make. Then enter the dimensions of that concrete structure or slab into the calculator. The calculator calculates the volume of the structure. Then it has an optional cost calculation where you can set the price of the cement and determine the total cost.

Highlights:

This calculator can calculate the amount of cement needed for Square Slab, Round Slab, Wall, Footer, Square Column, Round Column, Steps, Curb & Gutter.
It calculates the volume of the slab or other selected structures.
Offers optional cost calculation to estimate the total of making the slab or structure.
Option to share the calculation online.

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ConcreteNetwork.com

ConcreteNetwork.com offers a free online concrete calculator where you can estimate the amount of cement needed to make a concrete slab. This calculator takes the dimensions of the slab and then determines its volume. The dimensions are limited to feet/inch only. Based on the volume of the slab, it estimates how many bags of pre-mix cement would need to make the slab. Along with the slab, it can also estimate the concrete amount to make footing and column.

Highlights:

This calculator can calculate the amount of cement needed for making Slabs, Footings, and Columns.
It calculates the volume of the slab or other selected structures.
It tells hows many bags of cement is required to make the slab or other selected structure.
It does the calculations for one structure at a time.
Only offers one measurement unit; no option to change that.

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Birlaa1.com

Birlaa1.com has an online concrete calculator to estimate the amount of cement, sand, and aggregate needed to make a concrete slab. The calculator has two grades of concrete (M20 & M25) and has two fixed options for width. You have to enter the dimensions of the concrete slab, and select the thickness, and grade of concrete. Based on that, it calculates the concrete volume and area of the slab. Then it breaks down the amount of sand, cement, and aggregate you would need to make the concrete slab.

Highlights:

This calculator calculates the cement for making concrete structures.
It calculates the volume and area of the concrete structure.
It breaks down the amount of cement, sand, and aggregate needed to make the concrete.
Supports only the SI unit system.

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MaterialTree.com

MaterialTree.com is another free online concrete calculator. This calculator has 3 commonly used concrete mixtures and works in SI units. All you have to do is enter the dimensions of the content you want to build and select the mixture. First, it calculates the volume of the concrete structure. Based on that, it tells you the amount of cement, sand, and aggregate you need to make the concrete.