Yarta calculator
Your recycling, measured.
Enter what you recycled and see what Yarta would report: tonnes by fate, steel recovered, landfill volume avoided, the proposed Yarta Score, and two emissions figures kept apart: your Scope 3 Category 5 inventory and the avoided emissions reported beside it. Every figure shows its method.
The calculator · one period
What you recycled
Thirteen reporting categories · one period
Counts are converted to tonnes with the unit weights in the Yarta Method.
The score
What Yarta would report
How this was calculated
Generated from the Yarta Method factor library, so it cannot drift from the method. Sources, statuses and unit weights are listed in full on the method page.
Verified recycling data supplied by The Mattress Recycling Company and Recycle Group.
Recycled means delivered to a licensed reprocessor, with a docket; stored material is not counted as recycled. Pending categories count recovered mass but carry no avoided-emissions estimate. The calculator is indicative: it uses default pathways and illustrative processing and transport values. A Yarta Report requires Yarta-entered, evidenced data for the period, and is issued by Recycle Group as the processing operator.
Worked example · 1,000 mattresses
The arithmetic, in the open.
Every number below is computed by the same engine as the calculator above, so the two cannot disagree.
From 80.0 t handed over, sold to a licensed metal reprocessor. 99% is Recycle Group's stated plant yield; a report prints the measured yield and its study date.
- A · Scope 3 Category 5
- 74.7t CO₂-e
- B · Avoided · separate
- 11.8t CO₂-e
- Landfill volume avoided
- 583m³
- Recovery rate
- 33.4%
- Yarta Score · self-declared
- 42of 100 · Developing
Mass handed over
1,000 mattresses × 80 kg average = 80.0 t handed over. The 80 kg average is Recycle Group's stated processing figure.
Steel recovered
80.0 t × 33.75% steel by mass × 99% recovered = 26.7 t of steel, delivered to a licensed metal reprocessor. The 99% is Recycle Group's stated plant yield, used until a dated yield study replaces it.
A · Scope 3 Category 5, your inventory figure
Processing 80.0 t × 0.05 = 4.0 t (supplier-specific, illustrative) + transport 80.0 t × 120 km × 0.15 kg = 1.4 t (illustrative) + landfilled residual 53.3 t × 1.3 (NGA mixed C&I, interim) = 69.3 t. Total 74.7 t CO₂-e.
Had all 80 t gone to landfill, the figure would be 104 t. And a one-week composition audit of the residual would likely cut it further: at an assumed 70% foam, 25% textile fibre and 5% wood, the residual factor falls to about 0.54 and the total to about 34 t. That audit is the cheapest improvement in the method.
B · Avoided emissions, reported separately
26.7 t × 0.44 t CO₂-e per tonne recycled (steel, NSW DECCW 2010, Table 4) = 11.8 t CO₂-e. An estimate, shown beside A and never deducted from it. Not an offset. No estimate is made for the foam and fibre, because no factor for it is in the library.
Landfill volume avoided
Each mattress is 0.7 m³, so 700 m³ would have gone into landfill. The residual, 67% of the mass, is shredded to 25% of its volume, so 117 m³ did go in. 583 m³ avoided.
Material recovery rate
26.7 t recycled ÷ 80.0 t handed over = 33.4%.
Why a third. The steel is recovered. The foam and fibre residual is shredded and landfilled while recovery trials continue, so two thirds of a mattress by mass currently counts as landfilled. Yarta reports it that way rather than counting the whole mattress as recycled.
Yarta Score
Recovery 20.0 of 60 · Carbon 7.4 of 25 (0.15 t of estimated avoided emissions per tonne handed over, against a reference of 0.5) · Evidence 15.0 of 15 (weighbridge docket assumed) = 42 out of 100, Developing. Proposed v0.1: self-declared, not an accredited rating or certification.
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