Rip Rap Calculator

Your details

Volume mode: calculate how much rip rap you need for a known area. Hydraulic mode: find the minimum rock size to resist a given flow velocity.
Length of the area to protect.
ft
Width of the area to protect.
ft
Thickness of the rip rap layer. Typical values: 12 in for light drainage, 18-24 in for stream banks, 30-36 in for shoreline protection.
in
Select the standard size class that matches your project specification. Class 2 (medium) is the most common for stream-bank stabilization.
Additional material to order for settling, voids and waste. 5-10 % is typical for most projects.
%
Material cost at the quarry or delivered, whichever you need. Leave at 0 to skip cost estimation.
USD/ton
Total weight
45.4short tons

Total rip rap required including waste factor

Volume30.6yd3
Volume (m3)23.36m3
Coverage area500ft2
Truck loads2.5
Estimated material cost2,268.75USD
Weight (short tons)45.4
Volume (yd3)30.6
Truck loads2.5

You need 45.4 short tons of rip rap for this project.

  • Your project requires 45.4 short tons (30.6 yd3) of rip rap, including the waste factor.
  • That is approximately 3 tandem-axle truck loads (assuming 18 short tons per load).
  • Your depth meets or exceeds recommended minimums for stream and shoreline protection applications.
  • Estimated material cost is $2268.75 at the price you entered (excluding delivery and installation).

Next stepGet at least two quarry quotes before ordering. Confirm the stone class with your erosion-control specification sheet, and add geotextile fabric under the rip rap where fine soils are present.

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