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Catalyst loading calculator (mol%, ppm, eq)

Convert eq, mol% and ppm, then compute catalyst mass, volume, or stock solution volume from a base amount.

ppm here means molar ratio relative to the base, not solution mg/L.

All calculations run in your browser; no input values are sent to a server.

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How to use (3 steps)

  1. Pick a tab: converter, dose from base, or back-calc from an actual amount.
  2. Enter the base amount and the catalyst ratio or measured mass/volume.
  3. Copy the results table or share the URL.

Quick examples

Mode

Base (usually limiting reagent)

Catalyst and additives

Summary table

This output shows the ratio, mmol, mass, volume, and stock volume for each line.

Name Eq mol% ppm Amount Mass Volume Stock volume

This means the required catalyst/additive amounts relative to the base amount.

FAQ

Is 1000 ppm the same as 0.1 mol%?

Yes. 1000 ppm equals 0.1 mol% and 0.001 eq relative to the base.

Can I compute volume from a stock solution?

Yes. Choose stock in the amount type, provide the stock concentration, and the volume is calculated.

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