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gravel Calculator

Gravel Calculator

Select the area, parameter, and input the required values to calculate the amount and cost of gravel needed for the earthwork project through this tool.


The area to fill is:


Calculate Material using:
















Price/Unit of mass (optional)



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Our gravel calculator helps to estimate how much gravel in volume and weight you need to complete your earthwork project. However, by using this online gravel cost calculator you come to know how much the gravel material will cost you!

How Much Gravel Do I Need?

This gravel calculator estimates the volume & weight of gravel needed and here we have manual calculations for both.

And, if you concerned to determine how much mulch you need for a given area at a specified depth, then this online mulch calculator works best for you.

How to Calculate Volume of Gravel:

To calculate the volume needed, follow the given steps:

  •  Measure the length & width of the area for which you going for the construction.
  •  Find out the area of the surface from length & width. \((A = L \times W)\).
  •  Determine the depth of the surface.
  •  Find out the volume by multiplying the area and depth.
  •  The volume obtained is the volume needed for the gravel to complete the project.


A surface has \(18 ft\) long and \(21 ft\) wide with a depth of \(10 ft\). Then how much gravel do I need?


\(L = 18 ft\)
\(W = 21 ft\)
\(D = 10 ft\)
So, find the area by,
\(A = L \times W\)
\(A = 18 \times 21\)
\(A = 378 ft^2\)

Calculate the volume by using the formula:

\(V = A \times D\)
\(V = 378 \times 10\)
\(V = 3780 ft^3\)

How to Calculate Weight of Gravel:

To calculate the weight needed, using the formula:

\(Density = \frac {mass}{volume}
\(mass = Density \times volume\)


If the volume needed is \(3780 ft^3\) and the density is \(104.88 lb/ft^3\), then find the weight needed?



\(Density = 104.88 lb/ft^3\)
\(Volume = 3780 ft^3\)

\(mass = Density \times volume\)
\(mass = 104.88 \times 3780\)
\(mass = 396446.4 lbs (198.223 tons)\)

What Are The Types of Gravel?

According to their different size & shape, they can be classified into following:

  • Bank Gravel
  • Bench Gravel
  • River Rock (Creek Rock)
  • Crushed Stone
  • Fine Gravel
  • Stone Dust
  • Lag Gravel
  • Pay Dirt
  • Pea Gravel
  • Piedmont Gravel
  • Plateau Gravel

How Gravel Calculator Works:

The online gravel estimator allows you to calculate how much gravel you need to convert a rectangular area or circular area, the given steps will help you in using this free online calculator:


  • First of all, choose the area that you need to fill with gravel material, it can either rectangular or circular
  • Now, you just have to put the values into the designated field of this online grave calculator
  • Tap the calculate button


The online gravel estimator estimates:

  • The volume needed for gravel
  • The weight needed for gravel


It doesn’t matter whether you do gravel calculations for the rectangular or circular area, there you have an option field of price per unit mass. You just have to enter the price/unit of mass into this gravel cost calculator to determine the total cost of gravel you required for your project.


How much rock do I need?

Calculating rock needs:

Material Suggested Depth Coverage Area per 1 ton
3”-8” rock 3”-8” 60 square feet
1”-3” rock 1”-3” 80 square feet
3/4”-1” screened gravel 2” 100 square feet
5/8”-1/2” screened gravel 2” 120 square feet
1/4-3/8” screened gravel 2” 140 square feet

How much is a ton of gravel?

The cost of gravel ranges from:

  • $10 to $50 per ton
  • $15 to $75 per yard
  • $1 to $3 per square foot
  • $1,350 per truck-load that depends on the type of material , volume, and travel distance


From the source of Wikipedia: Gravel, Types, Geological formation, Modern production and much more!

From the site of basalconstruction: How much gravel you need for your driveway?