Treepit Costing Tool

Compare costs for Rock/Soil (Structural Soil, Stockholm Method, CU-Soil) with Structural Soil Cells, in your region. Based on required growing media.

This calculator shows values in Metres, Centimeters and $AUD. To switch, change the country in the top right of the site.

Step 1a – Target Soil Volume Calculation

Crown Projection

Mature tree canopy diameter

N/A

m³

Target soil volume/tree (TSVCP) - Crown Projection method. Ask tree nurseryman for the mature canopy spread (diameter) of your chosen species in your region, in unrestructed soil volume

Step 1b – Target Soil Volume Calculation

Balance Formula

Enter mature tree height

N/A

m³

Target soil volume/tree (TSVBF) - Balance Formula method. A more accurate method for soil volume calculation, developed by Ross Clarke of Trees Impact

Estimate trunk diameter at breast height ^(DBH) (approximately 1.4 m up from ground level)

Field Size Index (FSI)

Tree canopy shape

Select the canopy type from the list

Average Target Soil Vol/Tree (ATSV)

N/A

m³

Step 2 – Treepit Sizing

Select soil volume per tree

m³

N/A

Your chosen soil volume as a % of recommendedabove (ATSV)

Excavation Size - Soil Cells

m³

Required treepit size (RTPS) - Soil modules occupy approx 10% of the pit volume, so the total excavation has been increased proportionately, to yield the target volume of growth media

Excavation Size - Structural Soil

m³

Required treepit size (RTPS) - Stone occupies approx 80% of the pit volume, so the total excavation has been increased proportionately, to yield the target volume of growth media

Step 3 – Treepit Costs - Soil Cell

Excavation cost ($/volume)

$/m³

N/A

Enter your regional costs/cubic to excavate pit

Cartage & disposal cost ($/volume)

$/m³

N/A

Enter your regional costs/cubic to cart and dispose of excavated soil

Select Citygreen soil module product

Refer to Citygreen for average costs/cubic for soil modules in your region

Citygreen module product cost ($/volume)

$/m³

N/A

Est cost to purchase soil cells

Select soil type - Imported filler soil, or amend site soil.

Select whether you are buying quality filler soil for the trees, or whether you can amend the site soil and reuse (better option if available)

Cost ($/volume) for filler soil, or to amend site soil

$/m³

N/A

Enter cost/cubic to purchase quality filler soil, or cost/cubic to amend site soil and reuse

Ancillary cost as a % of soil module cost

N/A

Est cost to purchase ancillaries - typically 5 - 8%

Labor rate per hour

$/hr

N/A

Allow 10min/m3 installation time

Total Estimated Cost - Soil Cells

N/A

Step 4 – Treepit Costs - Structural Soil

Excavation cost ($/volume)

$/m³

N/A

Enter your regional costs/cubic to excavate pit

Cartage & disposal cost ($/volume)

$/m³

N/A

Enter your regional costs/cubic to cart and dispose of excavated soil

Structural soil cost ($/volume)

$/m³

N/A

Est cost to purchase structural soil

Ancillary cost as calculated above

Est cost to purchase ancillaries

Labor rate per hour

$/hr

N/A

Allow 5min/m3 installation time.

Total Estimated Cost - Structural Soil

N/A

Savings Soil Cells

N/A