Peptide price per mg: how to compare vials properly

The formula

Divide the price by the labelled quantity in mg. A 10 mg vial at £60 is £6.00 per mg; a 5 mg vial at £40 is £8.00 per mg. The smaller vial costs less but is the more expensive way to buy the peptide.

Why pack size matters

Fixed costs such as synthesis set-up, purification runs, testing and packaging are spread over more milligrams in a larger vial. That is why each compound page on peptide.wiki shows the best price per mg across in-stock sizes.

Adjusting for purity and content

Two vials with the same label can contain different amounts of the target peptide. Dividing price by net peptide content gives a cost per mg of actual peptide. The guide on purity versus net content explains why the two percentages differ.

When the cheapest size is not the best

A larger vial is only a saving if you will use it before the material degrades or the batch changes. Planning quantities up front, for example with the cost planner, avoids both over-buying and repeated small orders.

• Work out the total mg the project needs.
• Let the planner find the cheapest combination of vials.
• Log each batch so the stock is traceable.

Using the live table

The prices page lists every tracked Nordapep size with its price per mg, refreshed hourly, and the statistics page reports the median across the catalogue.