Doses per vial calculator

How many doses are in a vial?

Divide the amount in the vial by your dose, using the same unit, and round down. A 5 mg vial is 5,000 mcg, so at 250 mcg per dose it holds 5,000 ÷ 250 = 20 full doses.

Round down because a partial dose isn't a full dose. The calculator also shows what is left over.

How long will a vial last?

Divide the number of doses by how many you take each week. 20 doses once a day lasts 20 days; at 3 doses a week the same vial lasts 6.7 weeks, about 47 days.

How long a mixed vial stays usable is a separate question: it depends on the product, so follow the storage directions on its label.

Doses per vial chart

Full doses in a vial for common vial sizes and doses, calculated by this site.

Does the water change the number of doses?

No: water only changes how much liquid each dose takes, not how many doses the vial holds.

To see the units for each dose, use the peptide calculator; to choose the water, use the bacteriostatic water calculator.

Frequently asked questions

How many doses are in a 5 mg vial?

It depends on the dose. At 250 mcg a 5 mg vial holds 20 full doses; at 500 mcg it holds 10. Enter your own dose above.

Does adding more water give me more doses?

No. The number of doses depends only on how much peptide is in the vial and the size of your dose. More water makes each dose take more units, not more doses.

What do I do with the amount left over?

It is less than one full dose, so it can't make another dose on its own. For example, a 10 mg vial at 300 mcg gives 33 doses with 100 mcg left over.

How long does a mixed vial stay usable?

It depends on the product. Follow the storage directions and time limit on its label, and discard a vial that looks cloudy or has particles.