GLP-1 dosage calculators and conversion tools
The two calculators on this page convert a prescribed tirzepatide or semaglutide dose in mg into insulin-syringe units and mL for the concentration printed on your vial. They are not dosing advice: they never choose or adjust a dose, only translate the one your prescriber wrote. Compounded drugs are not FDA-approved or evaluated by the FDA for safety or effectiveness.
Tirzepatide dosage calculator
Enter the tirzepatide dose your prescriber wrote (in mg) and the concentration printed on your vial (mg/mL). The tool returns the draw in U-100 insulin-syringe units and in mL, with a visual syringe so you can check the line before you inject.
Open the tirzepatide tool DosingSemaglutide dosage calculator
Convert a prescribed semaglutide dose from mg to syringe units and mL for every common vial concentration from 1 to 10 mg/mL. It also includes a units-to-mg table for reading a syringe marking back into milligrams.
Open the semaglutide tool Conversionmg to units calculator
A drug-agnostic converter between milligrams, insulin-syringe units and millilitres, in both directions, at any vial concentration. Covers U-100, U-50 and U-40 syringe scales for reading a marking back into milligrams.
Open the conversion tool ReconstitutionPeptide calculator
Enter the mg in a peptide vial and the bacteriostatic water added to get the concentration, then convert a prescribed dose in mcg or mg into syringe units, mL and doses per vial. Educational arithmetic only; it never suggests a dose.
Open the peptide calculatorDosing charts
The standard titration ladders for both medications, with units per dose already worked out for the common vial concentrations. Use them to sanity-check a calculator result or see how a schedule steps up.
Costs
What tirzepatide and semaglutide cost through telehealth programs in 2026, brand and compounded, with membership fees and prepay structures spelled out. Each post is dated, so you can see how current a price is.
Provider comparison
Side-by-side reviews of the telehealth providers that prescribe GLP-1 medication: what each one charges, what the price includes, and how they handle refills. No rankings.
How the dose calculators work
Both tools run the same arithmetic a pharmacist uses: units on a U-100 insulin syringe equal the dose in mg divided by the vial concentration in mg/mL, multiplied by 100. A 2.5 mg tirzepatide dose from a 10 mg/mL vial is 25 units, or 0.25 mL; the same dose from a 20 mg/mL vial is 12.5 units. Same dose, different syringe marking, which is why every result is tied to the concentration you enter.
Each calculator page also publishes its full conversion table as plain text, so the numbers can be checked against the vial label without the tool. If a result looks unfamiliar, the mismatch is almost always the concentration field.
Run a clinic, pharmacy or patient-community website? The same calculators are available as a free calculator widget for your website, one copy-paste snippet each.
Questions about these tools
What if my dose is more than 100 units?
More than 100 units is more than 1 mL, which will not fit a standard 1 mL U-100 insulin syringe. Both calculators flag a result over 100 units, and the conversion tables mark those cells with a dagger. Confirm your vial concentration and your syringe size with your pharmacy before drawing anything; a result that large usually means the concentration was entered wrong.
Which concentration should I pick?
The one printed on your vial label, in mg/mL. Compounded vials of the same medication are dispensed at different concentrations by different pharmacies, so the label on the vial in your hand is the only source that counts. If the label shows total mg per vial and a volume in mL, divide the two to get mg/mL.
Are compounded GLP-1 doses the same as brand doses?
The prescribed dose is written in milligrams either way, but compounded vials are not FDA-approved and are not therapeutically equivalent to the brand pens. Vial concentrations also vary by pharmacy, so always convert using the concentration printed on your own vial.
Looking for a prescriber?
We do not prescribe, dispense or sell treatment. Compare providers opens a list of what each licensed telehealth provider charges and includes.