Quantify the total cost of raw materials per gram of desired product. Identify which reagents or solvents dominate your process cost and evaluate alternative routes — all in your browser, no data sent anywhere.
The Raw Material Cost (RMC) is the total cost of all raw materials consumed in a chemical process, divided by the mass of desired product isolated. It is a straightforward economic metric that complements mass-based green chemistry metrics such as the E-factor and PMI, and is particularly valuable when comparing alternative synthetic routes or evaluating scale-up feasibility.
| Symbol | Term | Units |
|---|---|---|
| $\text{RMC}$ | Raw Material Cost per unit mass of product | currency / g (or currency / kg) |
| $c_i$ | Unit cost of material $i$ | currency / g |
| $m_i$ | Net mass of material $i$ (mass used minus mass recovered) | g |
| $m_{\text{product}}$ | Mass of isolated desired product | g |
Recovered solvents or catalysts reduce the RMC, rewarding circular approaches. If no material is recovered, net mass equals mass charged.
| Metric | What it measures | Stage |
|---|---|---|
| Atom Economy (AE) | Theoretical fraction of reactant mass incorporated into the product | Design |
| E-Factor | Total waste mass per unit product mass | Experimental |
| PMI | Total mass of all inputs per unit product mass | Experimental |
| RMC | Total raw material cost per unit product mass — economic lens on mass efficiency | Experimental |
Enter all materials used: reagents, solvents, catalysts, and workup/purification materials. Enter the unit cost per gram. If a material is recovered and reused, enter that mass in "Recovered" — it reduces the net cost. Do not enter the product here.
| Material name | Category | Mass used (g) | Recovered (g) | Unit cost (£/g) | Line cost (£) |
|---|
Enter the mass of each desired product actually isolated. Their combined mass forms the denominator of the RMC.
| Product name | Mass isolated (g) |
|---|
| Material | Category | Mass used (g) | Recovered (g) | Net mass (g) | Unit cost (£/g) | Line cost (£) | % of total cost | Visual |
|---|---|---|---|---|---|---|---|---|
| Enter raw materials and product above to see breakdown. | ||||||||
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Export your RMC calculation as a PDF report or CSV data file. PDF opens in a new tab and uses your browser's print function.
Roles follow the CRediT taxonomy, adapted for educational software. Hover a contributor's name for a summary, or a column header for the role definition.
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