Concrete Slab Calculator
for Slabs, Floors, Footings and Cylinders

This is a terrific concrete slab calculator for estimating how many cubic yards to order to complete your concrete slabs, concrete floors, concrete walls, and concrete footings.

Just remember to add some extra concrete to your total order because running short is not an option.

concrete slab calculator ran short of concrete

How much concrete do I need?

Enter your length, width, and thickness then hit calculate and you'll see how many cubic yards you need.

This concrete calculator also calculates cubic meters. Just plug in the numbers, make sure you choose meters, and hit calculate. 

You'll see both cubic yards and cubic meters in the answer area.

Slabs, Square Footings, or Walls

thickness or height

Hole, Column, or Round Footings

depth or height

Circular Slab or Tube

outer diameter
inner diameter
length or height

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I highly recommend this handy concrete calculator for your truck or office.

It will calculate concrete yardage for anything, it will also calculate volume, area, square footage and much more.

Definitely a time saver when you're on the job.

How I calculate concrete for my jobs.

When estimating the amount of concrete for my concrete jobs, I always check the level of the subgrade and come up with an average thickness.

Most of the jobs I check, the dirt grade is rarely level. Using a laser level this can be done quite easily.

I use a laser level that self-levels itself when you turn it on, that way you can be sure the readings you get are accurate.

For a grade stick I use a long, narrow piece of wood with a yard stick attached to it. Using the yard stick allows me to be accurate to within 1/16 of an inch if I want to.

I usually spray paint the numbers I get from moving the receiver up and down on the yard stick, right onto the dirt, when I check the dirt grade.

This helps me remember how level or un-level the dirt is graded. I take multiple readings of the sub-grade depending on how big the area is.

concrete slab calculator to figure concrete

Once I've covered the entire area, I can average the numbers together to get a final reading.

Once I've determined the average grade of the dirt, I can set the finish concrete floor grade up 4, 5, or 6 inches from that, depending on how thick I want my concrete floor.

When I know my average thickness of the concrete, I can plug those numbers into the concrete calculator it'll tell me how many cubic yards to order.

After using the concrete calculator to figure the exact amount of concrete, I usually order anywhere from a half yard to a full yard extra, depending on how the subgrade is prepared.

If you make a mistake and don't order enough concrete, (hopefully not) just call the concrete dispatcher and he will send another concrete truck with the balance on it.

But be prepared to wait if the concrete company is busy and doesn't have a truck waiting.

Read the information below to learn more about concrete slabs:






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