Total amount versus strength

When you add a vial, What do you know? lets you enter it as a Total amount or as a Strength.

Both options describe the same vial. Pick the one you know.

Total amount is the whole vial. Enter the total powder and the total liquid.

A 10 mg vial in 2 mL is 10 mg and 2 mL. The app works out the strength, which is 5 mg/mL.

The total amount is everything in the vial, not a single dose.

Strength is the same vial written as a concentration. Enter the compound per mL and the total liquid.

5 mg/mL across 2 mL is 10 mg of powder. The app works out the total for you.

Choose Strength when the number you have is a concentration like 5 mg/mL.

These two units look alike and mean different things.

mg is a quantity. It is the whole amount of powder in the vial, like the 10 mg here.

mg/mL is a rate. It is how much powder sits in each milliliter, like the 5 mg/mL here.

A dose is measured in mg too. That is why the total amount gets read as a single dose. Check the unit before you type a number.

5 mg/mL means that for every 1 mL of BAC Water in the vial, you have 5 mg of your compound.

Most insulin syringes are marked U-100. On a U-100 syringe, 1 mL holds 100 units. So for every 100 units you draw, you have 5 mg, which is 5000 mcg.

That works out to 50 mcg in every unit. At 5 mg/mL, a 20 unit draw is 1 mg.

10 mg in 2 mL and 5 mg/mL are the same vial.

The Total amount side shows the strength as 5 mg/mL, the same vial as the Strength side.

Enter whichever number you have. The app fills in the rest and measures every dose from it.

You do not have to trust the math. Open the Measure tab and use the reconstitution calculator to check it.

Enter the same vial, 10 mg in 2 mL. Enter a 1 mg dose.

The ruler reads 20 units, which is 0.2 mL. That is the 20 units the strength works out to. The vial gives 10 full doses at that draw.