Pindrop

mg to mL Calculator

For pre-mixed oil solutions like testosterone esters. Enter the concentration printed on the vial and your dose in milligrams to get the volume to draw.

mg/mL

From the vial, e.g. 200 for test cyp.

mg

Draw this volume

0.8mL

≈ 80 units on a U-100 insulin syringe
0102030405060708090100
Volume
0.8mL
On a U-100 syringe
80units

What this calculator does

Oil-based injectables like testosterone cypionate come pre-mixed at a fixed strength, written as milligrams per milliliter. There is no water to add and no reconstitution step. The only math is dividing your dose by that concentration to get the volume, and this calculator does it without the decimal-place slips that happen on a phone at the counter.

Enter the concentration from the vial and the dose you want in milligrams. A 200 mg/mL vial and a 160 mg dose come out to 0.8 mL. Since many people draw oils into an insulin syringe, the result also shows the equivalent unit count on a U-100 scale, where 1 mL is 100 units.

Reading the result

The main number is the milliliters to draw; the caption gives the same amount in syringe units. A warning appears if the volume is over 3 mL, which is a lot for one injection and usually means the concentration was entered wrong, or under 0.05 mL, which is hard to measure accurately. If you split a weekly total across several injections, divide first, then enter the per-injection dose here.

Common questions

How many mL is 200 mg of testosterone?
Divide the dose by the vial concentration. From a 200 mg/mL vial, 200 mg is exactly 1 mL. From a 250 mg/mL vial, that same 200 mg is 0.8 mL. You always need the concentration on the label to convert.
How do you convert mg to mL for an injection?
mL equals the dose in mg divided by the concentration in mg/mL. So 100 mg from a 250 mg/mL vial is 100 divided by 250, which is 0.4 mL. That is the whole formula.
What does mg/mL concentration mean?
It is how much drug is packed into each milliliter of liquid. A 200 mg/mL testosterone vial holds 200 mg in every 1 mL, so half a mL is 100 mg. Higher concentration means a smaller injection volume for the same dose.
How do I read a testosterone dose on an insulin syringe?
Convert to mL first, then read it as units, where 1 mL is 100 units on a U-100 syringe. So 0.5 mL is 50 units and 0.25 mL is 25 units. That means 100 mg from a 200 mg/mL vial is 0.5 mL, or 50 units.
How much testosterone is in 0.5 mL?
It depends on the concentration. At 200 mg/mL, 0.5 mL is 100 mg. At 250 mg/mL, the same 0.5 mL is 125 mg. Read the mg/mL number on your vial and multiply by 0.5.

Pindrop is a calculation tool, not medical advice. Confirm your dose and protocol with a licensed healthcare provider.