RedoseAbout the mg to mcg calculator
Peptide doses jump between milligrams and micrograms constantly: vials are labelled in mg, but doses are often prescribed in mcg. Mixing the two up by a factor of 1000 is one of the easiest and most dangerous dosing mistakes to make.
The conversion itself is simple, 1 mg = 1000 mcg, so you multiply by 1000 to go from mg to mcg, and divide by 1000 to go from mcg to mg. This calculator does it both ways: pick your starting unit and read off the other.
Once your dose is in the right unit, the dose-to-units calculator turns it into syringe units, and the reconstitution calculator works out the concentration from your vial.
FAQ
How many mcg are in a mg?
There are 1000 micrograms (mcg) in 1 milligram (mg). To convert mg to mcg, multiply by 1000; to convert mcg to mg, divide by 1000.
How do I convert 250 mcg to mg?
Divide by 1000. 250 mcg is 0.25 mg. Likewise 500 mcg is 0.5 mg and 1000 mcg is 1 mg.
Why does the mg/mcg distinction matter for peptides?
Because doses are small, a vial might hold 5 mg but a dose may be 250 mcg. Confusing the two means dosing 1000 times too much or too little, so always confirm the unit before drawing.