Quick Green Chemistry Calculators

Atom Economy

Efficiency Metric

AE = (MW product) / (Σ MW reactants)

Product MW (g/mol) Total Reactants MW Calculate

0.00

Atom Economy (ratio)

Higher values indicate better atom utilization (max: 1.0)

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E-factor

Waste Efficiency

E = (Total - Product) / Product

Total mass in (g) Product mass (g) Calculate

0.00

E-Factor

Lower values indicate less waste generation

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PMI

Process Mass Intensity

PMI = Total mass in / Product mass

Total mass in (g) Product mass (g) Calculate

0.00

PMI

Lower values indicate more efficient processes

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Water Usage

Consumption Metric

Outputs L per g and L per kg of product

Total water used (L) Product mass (g) Calculate

0.00 L/g • 0.00 L/kg

Water Usage

Lower values indicate better water efficiency

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Energy Use

Power Consumption

Outputs kWh per g and kWh per kg of product

Total energy used (kWh) Product mass (g)

Calculate Energy

Energy Impact Result

0.00 kWh/g • 0.00 kWh/kg

Lower values indicate more efficient energy usage

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RME

Reaction Mass Efficiency

RME = (Product mass) / (Σ Reactant masses)

Reactant masses (g, comma-separated) Product mass (g)

Calculate RME

RME Result

0.00

RME (ratio) - Higher values indicate better material utilization (max: 1.0)

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Carbon Efficiency

Carbon Utilization

CE = (Coeff × C atoms)product / Σ(Coeff × C atoms)reactants

Product (Coeff:C atoms) Example: 1:6 (1 mol product with 6 carbons) Reactants (Coeff:C atoms, comma-separated) Example: 1:4, 1:2 (1 mol with 4 C + 1 mol with 2 C) Calculate

0.00

Carbon Efficiency (ratio)

Higher values indicate better carbon atom utilization (max: 1.0)

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Stoichiometric Factor

Reaction Stoichiometry

Overall SF = (Σ equivalents used) / (Σ stoichiometric equivalents required)

Species (comma-separated triples name:eq_used:eq_stoich)

Calculate SF

Stoichiometric Factor Result

0.00

Lower values indicate more efficient stoichiometric utilization

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Solvent Intensity

Solvent Usage Metric

SI = Total solvent volume (L) / Product mass (kg)

Total solvent volume (L) Product mass (g)

Calculate SI

Solvent Intensity Result

0.00 L/kg

Lower values indicate more efficient solvent usage

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Carbon Footprint

CO₂ Emission Impact

CF = CO₂ emissions from energy (kg) / Product mass (kg)

Energy consumption (kWh) Product mass (kg)

Calculate CF

Carbon Footprint Result

0.00 kg CO₂/kg

Lower values indicate reduced environmental impact

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Optimum Efficiency

Combined Metric

OE = RME / Atom Economy

RME (ratio, 0-1) Atom Economy (ratio, 0-1) Calculate

0.00

Optimum Efficiency (ratio)

Higher values indicate optimal process efficiency (max: 1.0)

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Effective Mass Yield

Safety Efficiency

EMY = Product mass / Hazardous materials

Product mass (g) Hazardous materials (g) Calculate

0.00

Effective Mass Yield (ratio)

Higher values indicate better safety efficiency (can exceed 1.0)

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Reaction Mass Intensity

Reaction Efficiency

RMI = (Reactants + Solvents + Catalyst) / Product

Product mass (g) Reactant mass (g) Solvent mass (g) Catalyst mass (g) Catalyst recovery (%) Calculate

0.00

Reaction Mass Intensity

Lower values indicate better material efficiency

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Reaction Yield (ε)

Molar Efficiency

ε = Product moles / Limiting reagent moles

Direct Moles From Mass/MW

Product moles (mol) Limiting reagent moles (mol)

Product

Mass (g) MW (g/mol)

Moles = —

Limiting Reagent

Mass (g) MW (g/mol)

Moles = —

Calculate Yield

0.00

Reaction Yield (ε) - ratio

Higher values indicate better stoichiometric efficiency (max: 1.0)

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