Quantify the fraction of your process inputs that come from renewable sources — by mass or by carbon content. Results update live as you type, and every session stays in your browser, never on a server.
The Renewable Feedstock Percentage (% RFP) quantifies the fraction of a process's total feedstock input that derives from renewable, biological, or recycled sources rather than finite fossil or mineral reserves. It is the primary experimental metric for Green Chemistry Principle 7: Use Renewable Feedstocks.
| Symbol | Term | Units |
|---|---|---|
| $\%\,\text{RFP}$ | Renewable Feedstock Percentage | % (0–100); ideal value = 100% |
| $m_{\text{renewable}}$ | Total mass (or carbon content) of all feedstocks classified as renewable | g (or g C) |
| $m_{\text{total}}$ | Total mass (or carbon content) of all feedstocks used in the process | g (or g C) |
The calculation can be performed on a mass basis (simpler, more common) or a carbon basis (more meaningful when feedstocks have widely different carbon contents — e.g. water vs. glucose). Toggle the basis in Section 03.
| Renewable | Non-renewable |
|---|---|
| Plant-derived chemicals (sugars, oils, terpenes, lignocellulose) | Petroleum, natural gas, coal derivatives |
| Agricultural by-products and waste streams | Mineral acids and bases from extractive mining |
| Microbial fermentation products | Synthetic polymers from fossil feedstocks |
| CO₂ captured from atmosphere or industrial point sources | Fossil-derived solvents (e.g. hexane, toluene from crude oil) |
| Post-consumer recycled materials | Non-recycled virgin mineral resources |
Solvents are typically included in % RFP calculations because they often constitute the largest mass fraction of a chemical process. Catalysts may be included or excluded depending on the context and whether they are consumed or recycled.
| Metric | What it measures | Principle |
|---|---|---|
| % RFP | Fraction of feedstock mass (or carbon) from renewable sources | 7 |
| E-factor | Mass of all waste per mass of product | 1 |
| Carbon Footprint | Total GHG emissions per functional unit | 6 |
| Biobased Content (BBC) | Fraction of carbon in a product that is biogenic (measured by ¹⁴C) | 7 |
| PMI | Total mass input per mass of product — overall mass efficiency | 1 |
Choose whether to calculate % RFP on a mass basis (recommended for most lab experiments) or a carbon basis (better when feedstocks have very different carbon densities, e.g. water vs. sucrose). Switching modes will update the table and results immediately.
Enter the mass used (g) of each feedstock in Section 04. The tool computes: % RFP = Σ(renewable mass) / Σ(total mass) × 100.
Enter all feedstocks used in the process: reagents, solvents, catalysts, and any other material inputs. For each, classify it as Renewable or Non-renewable — this drives the % RFP calculation. The product itself should not be listed here.
| Feedstock name | Category | Source | Mass used (g) | Mass used (g) | Carbon content (%) | Carbon mass (g C) | Contributes (g) |
|---|
| Feedstock | Category | Source | Mass used (g) | Contributes (g) | % of total | Visual |
|---|---|---|---|---|---|---|
| Enter feedstocks above to see breakdown. | ||||||
Sessions are stored in your browser only. No data leaves your device.
Export your % RFP calculation as a PDF report or CSV data file. PDF opens in a new tab and uses your browser's print function. CSV downloads directly.
References are sorted alphabetically by first author.
Roles follow the CRediT taxonomy (Contributor Roles Taxonomy), adapted for educational software. Hover a contributor's name for a summary, or a column header for the definition of that role.
| Contributor |
|---|
© 2024– DodecaGreen Project. All rights reserved. · Last updated: 08/06/2026
This portal was built with the assistance of a large language model (Claude, Anthropic), which was used to generate and refine code, articulate and structure contributed ideas within the defined page format, and support iterative design decisions. All scientific content, conceptual frameworks, pedagogical choices, and final outputs were directed, reviewed, and verified by the contributors listed above.
If you use this tool in teaching or published work, please cite the DodecaGreen portal as the source.