Enter known quantities. If salvaged is blank, reuse plus recycle is used.
Use this sample to confirm outputs and exports.
| Project | Material | Total (ton) | Salvaged (ton) | Reused (ton) | Recycled (ton) | Disposed (ton) | Contam (%) | Loss (%) | Efficiency (%) |
|---|---|---|---|---|---|---|---|---|---|
| Retrofit Block A | Structural Steel | 25.0 | 16.5 | 10.0 | 6.5 | 8.5 | 4 | 2 | 95 |
- Gross salvage rate (%): (Salvaged ÷ Total) × 100
- Net recovered quantity: Salvaged × (1 − Contamination) × (1 − Processing loss) × Recovery efficiency
- Net salvage rate (%): (Net recovered ÷ Total) × 100
- Diversion rate (%): Salvaged ÷ (Salvaged + Disposed) × 100
- Net salvage value: (Salvaged × Market value) − (Salvaged × Handling cost)
- Enter the total quantity generated for the material stream.
- Enter salvaged and disposed quantities from tickets or logs.
- Split salvaged into reused and recycled when available.
- Add contamination, processing loss, and recovery efficiency estimates.
- Add values and costs to estimate net salvage value.
- Click Calculate to display results above the form.
- Use the download buttons to export CSV or PDF summaries.
Why salvage rate matters on active sites
Material salvage rate converts recovery activity into measurable performance. It helps project teams quantify diversion, plan storage space, and align trade sequencing with sustainability targets. Tracking gross and net rates highlights the difference between collected material and what is truly usable after contamination, processing loss, and recovery efficiency adjustments.
Interpreting gross versus net recovery
Gross salvage rate is the simplest indicator: salvaged quantity divided by total generated. Net salvage rate is more realistic for reporting because it discounts unusable fractions. For example, a 4% contamination factor and 2% processing loss reduce recovered tonnage even before applying a 95% recovery efficiency multiplier.
Data inputs that improve audit quality
Use weigh tickets, skip counts, and recycler receipts to capture total, salvaged, and disposed quantities. Split salvaged into reused and recycled to show how much stays in service. Add notes on sorting, cutting, de-nailing, or cleaning, because these steps influence losses and handling costs.
Cost and value signals for decision making
Salvage value is often decisive on tight schedules. This calculator estimates gross value from market rate and subtracts handling cost to show net salvage value. Use the net figure to compare options such as onsite reuse, offsite processing, or disposal when space and labor constraints change.
Example dataset and expected behavior
Example: Total 25.0 ton, Salvaged 16.5 ton, Disposed 8.5 ton, Reused 10.0 ton, Recycled 6.5 ton, Contamination 4%, Loss 2%, Efficiency 95%. The gross salvage rate is 66.00%. Net recovered is about 14.43 ton, giving a net salvage rate near 57.70%.
1) What is a material salvage rate?
It is the share of total generated material that is recovered for reuse or recycling. This tool reports gross rate from quantities and a net rate that accounts for contamination, losses, and recovery efficiency.
2) Why does the net salvage rate differ from the gross rate?
Gross rate counts everything collected as salvaged. Net rate reduces salvaged quantity for contamination and processing loss, then applies recovery efficiency to reflect what becomes usable material.
3) Do reused and recycled quantities need to equal salvaged quantity?
Ideally yes. If they differ, your logs may be missing a pathway, or salvage was estimated. The calculator flags mismatches so you can reconcile tickets and receipts.
4) How should I estimate contamination and processing loss?
Start with historical site data or recycler feedback. Contamination covers mixed debris and unsuitable pieces. Processing loss covers cutting, de-nailing, crushing fines, or breakage during handling and transport.
5) What does diversion rate mean here?
Diversion rate compares salvaged material to salvaged plus disposed material. It shows how much is kept out of landfill for the material stream you are tracking.
6) Can I use this for multiple materials on one project?
Yes. Run separate entries per material stream, then export CSV/PDF summaries and combine them in your reporting. This keeps rates accurate because contamination and values differ by material.
7) What if I do not know disposed quantity?
If you enter total and salvaged, the calculator can infer disposed as the remainder. Always confirm with disposal tickets when possible, especially for compliance and contractual reporting.