Topdressing Weight Calculator

This calculator helps determine the appropriate weight of topdressing needed for a given area, based on the depth of application and the material used.

Input Parameters

Calculation Results

Calculation Formula

Weight = Area × Depth × Density / 10000

Where:
Area = Area in square meters
Depth = Depth in centimeters
Density = Material density in kg per cubic meter
10000 = Conversion factor to convert cubic meters to cubic centimeters

Result

Total Topdressing Weight: 0.00 kg

Equivalent in bags (assuming 25kg bags): 0 bags

Coverage per bag: 0.00 sq. meters

Topdressing Weight Calculator Calculator Usage Guide

Learn how to use the Topdressing Weight Calculator and its working principles

How to Use the Calculator

  1. Enter the area you want to apply topdressing to in square meters.
  2. Specify the depth of topdressing you wish to apply in centimeters.
  3. Select the type of material from the dropdown, or choose "Custom" if your material is not listed.
  4. If you selected "Custom", enter the density of your material in kg/cu.m.
  5. Click the "Calculate" button to determine the total weight of topdressing needed.
  6. The results will show the total weight in kilograms, the number of 25kg bags required, and the coverage per bag.

Understanding the Calculation

The calculator uses the formula:

Weight (kg) = Area (sq.m) × Depth (cm) × Density (kg/cu.m) ÷ 10000

This formula calculates the volume of topdressing needed (in cubic centimeters) and then converts it to weight based on the material's density.

Material Densities

The densities used in this calculator are typical values for common topdressing materials:

  • Sand: 800 kg/cu.m
  • Peat Moss: 1000 kg/cu.m
  • Topsoil: 1200 kg/cu.m
  • Compost: 1500 kg/cu.m

For materials not listed, you can enter a custom density. If unsure, consult with your supplier or refer to material specifications.

Practical Tips

It's generally recommended to purchase slightly more topdressing than calculated to account for uneven application or measurement errors. A small surplus ensures complete coverage.

The calculator also provides information on coverage per bag, helping you plan your purchase and application efficiently.