Compost Cost Calculator

Plan compost sourcing for pads, berms, and landscapes. Enter area, depth, pricing, and crew time today. See volume, weight, and total installed cost instantly.

Calculator

Switching units keeps your current values.
Project footprint receiving compost.
Typical: 2–4 in or 5–10 cm.
Moist compost is heavier than dry compost.
Set price to match the unit you select.
Choose how the supplier quotes compost.
Flat charge for transport and unloading.
Include spreading, grading, and cleanup time.
Use the fully-burdened crew rate if available.
Loader, skid steer, or spreading equipment.
Rental rate excluding operator cost.
Examples: staking, erosion blanket, water, small tools.
Optional credit for avoided hauling or tipping fees.
Covers shrinkage, compaction, and placement loss.
Typical: 5–15% depending on site uncertainty.
Set to 0 if taxes do not apply.
Match how your accounting applies sales tax.
Downloads include calculated quantities and cost totals.

Example Data Table

Scenario Area Depth Waste Price Basis Unit Price Total Installed Cost
Landscape bed refresh 2,000 ft² 3 in 8% Per cubic yard 28.00 ≈ 953.00
Park slope stabilization 1,200 m² 6 cm 10% Per cubic meter 22.00 ≈ 2,050.00
Utility trench backfill blend 500 ft² 4 in 12% Per short ton 45.00 ≈ 420.00
Example totals are illustrative and depend on local pricing.

Formula Used

  • Base volume: V = A × d (convert depth to feet or meters first).
  • Adjusted volume (waste/overage): Vₐ = V × (1 + w/100).
  • Weight: W = Vₐ × ρ (using bulk density ρ).
  • Material cost: volume- or weight-based, matching the selected price basis.
  • Subtotal: S = material + delivery + labor + equipment + misc − savings.
  • Contingency: C = S × (c/100).
  • Tax: T = taxable × (t/100), where taxable is S or S + C.
  • Total: Total = S + C + T.

How to Use This Calculator

  1. Select the unit system that matches your drawings.
  2. Enter the project area and target compost depth.
  3. Set bulk density from supplier data or past deliveries.
  4. Choose the supplier’s pricing basis and enter the unit price.
  5. Add delivery, labor, equipment, and any miscellaneous costs.
  6. Include waste/overage, contingency, and tax rules as needed.
  7. Press Calculate, then export CSV or PDF for records.

Professional Notes

Project planning context

Compost is often specified for landscape beds, biofiltration media, slope stabilization, and soil rehabilitation on construction sites. Cost accuracy depends on geometry, moisture, and delivery logistics, not only supplier price. Early takeoffs help sequence hauling with grading.

Quantity takeoff basics

The calculator converts area and depth into volume, then applies an overage factor. In imperial units, cubic yards are common for bulk delivery; in metric projects, cubic meters are standard for procurement schedules. For example, 2,000 ft² at 3 in is about 18.5 yd³.

Bulk density and moisture

Bulk density varies widely with feedstock and moisture. Dry screened compost can be lighter, while wet material can be much heavier. Typical estimate ranges are 30–55 lb/ft³ or 480–880 kg/m³. Using an updated density value improves ton-based pricing and avoids under-ordering during rainy weeks.

Waste, shrinkage, and compaction

A 5–15% waste allowance is typical when placement losses, wheel-tracking, and compaction are expected. Finer blends may settle more after watering and initial rolling. The overage factor protects coverage when final grades are tight.

Pricing structures

Suppliers quote per cubic yard, per cubic meter, per short ton, or per metric tonne. The calculator translates your adjusted quantity into each measure, letting you compare bids even when vendors use different quoting conventions. When quotes include minimum loads, reflect that by increasing delivery or material totals. Add screening, testing, or certification fees if specifications require documented quality on site.

Installed cost drivers

Delivery fees can dominate small jobs, while labor and equipment rise on large spreads. Track crew hours for spreading, grading, and cleanup. As a planning benchmark, crews may place 10–25 yd³ per hour with a loader, but access and slope reduce output. Include loaders, skid steers, or blower trucks as daily equipment costs.

Contingency and tax logic

Contingency covers uncertainty such as access restrictions, soft subgrade, compost rework, or additional watering passes. Many estimators carry 5–10% on routine placements and 10–15% on constrained sites. Tax rules vary by jurisdiction and contract type. Choose whether tax is applied before or after contingency to match accounting practice.

Documentation and reporting

Exporting CSV supports estimate review, bid tabs, and change-order backup. The PDF report is useful for field packets, approvals, and vendor confirmations. Store the report with delivery tickets and moisture notes to explain any weight differences. Keeping inputs and outputs together makes later reconciliation faster and reduces scope disputes.

FAQs

Which unit system should I choose?

Use the same units used in your plans. Imperial works well for cubic-yard deliveries. Metric is convenient for cubic-meter procurement and kilogram-based density data. Switching units does not change the math, only the displayed inputs and outputs.

How do I pick a bulk density value?

Start with supplier data or past delivery tickets. If you only know weight and volume, density equals weight divided by volume. Moist compost is heavier, so update density after rain or long storage to avoid underestimating ton-based costs.

When is per-ton pricing better than per-volume?

Per-ton pricing can be fair when moisture varies or when scales are used at the yard. Per-volume pricing is common for screened material delivered by truck. Compare both by using the calculator’s unit basis options for the same project.

What waste percentage is reasonable?

Many estimates use 5–10% for flat, accessible placements and 10–15% for slopes, tight access, or heavy compaction. Increase overage when feathering edges, blending amendments, or when final coverage is critical for inspection.

Should contingency be taxed?

That depends on how your accounting applies sales tax. Some teams tax only direct costs, while others tax the full billed amount. Use the tax timing option to match your contract language and local requirements.

Can I include equipment like blower trucks?

Yes. Enter expected equipment days and a daily rate for loaders, skid steers, blower trucks, or spreaders. If equipment is billed hourly, convert to an equivalent daily amount or add it under miscellaneous costs.

What should I attach to a change order?

Export CSV for review and include the PDF report for backup. Add delivery tickets, moisture notes, and photos of placement areas. Clear documentation of quantities, unit pricing, and site constraints makes approvals faster.

Accurate compost budgeting keeps schedules steady and costs predictable.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.