Golf Course Materials Calculators

TopdressCalc

Estimate Topdressing Needs

Calculate how much topdressing sand you'll need!
Developed by Purdue University Department of Agronomy-Turfgrass Science

 *Add 15% to the total tonnage for waste and loss

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BunkerCalcEstimate Bunker Sand Needs

Use this online calculator to estimate how much bunker sand you'll need!
Developed by Purdue University Department of Agronomy-Turfgrass Science

*Add 15% to the total tonnage for waste and loss

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green

Estimate Green Area

The area of shapes that are similar to a circle but not perfectly round can be estimated by taking several measurements from the approximate center of the shape, computing the mean of measurements, and using that mean as the radius.

The more measurements taken, the more accurate the estimate is.  Measurements every 10° around the center will yield 36 observations, and a very reliable estimate. This can be accomplished by using a steel tape and and 3' x 3' board with straight lines radiating from the center every 10 degrees.

Longhand, the equation is: Mean Radii = (the sum of radii) / (the sum of measurements taken) and Area = 3.14 x (Mean Radii x Mean Radii)

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bulldozerEstimate Material Tonnage

The formula for estimating how much sand, gravel or greensmix you'll need is:
  • Area in square feet x desired depth in feet = Cubic Feet
  • Cubic feet divided by 27 = Cubic Yards
  • Cubic yards x 1.35 = Tons
  • Tons x (100% + percentage needed for waste) = tons required

An extra 15% of mix is usually added for waste, loss, and error in measuring.

 

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