12 mg to units on an insulin syringe
It depends on the concentration. 12 mg is 120 units at 10 mg/mL, 60 units at 20 mg/mL and 80 units at 15 mg/mL. The calculator below is set to 12 mg; change the vial and water to match yours.
Free downloadThe Protocol Pack
25 printable pages: dosing cards for the twelve most-used compounds at three water volumes, titration planners, a vial log, and five pages on what to do when it has already gone wrong.
Worked example: 12 mg from a 60 mg vial
The calculator above starts from a 60 mg Retatrutide vial reconstituted with 3 mL of bacteriostatic water. That is 20 mg/mL. 12 mg divided by 20 mg/mL is 0.6 mL, and on a U-100 insulin syringe 1 mL is 100 units, so the mark to draw to is 60 units. Change the vial or the water to match what is in your hand and the number updates.
12 mg is the top of the retatrutide range in most reported protocols, and sits next to the 12.5 mg tirzepatide rung, which is included in the table below.
12 mg in units, by vial and water
Every common vial size at 1, 2 and 3 mL. The dose never changes across a row; only the volume you draw does. Anything over 100 units does not fit a 1 mL syringe: use less water or split the injection.
| Vial | 1 mL water | 2 mL water | 3 mL water |
|---|---|---|---|
| 10 mg vial | more than the vial holds | more than the vial holds | more than the vial holds |
| 15 mg vial | 80 units | 160 units (over one syringe) | 240 units (over one syringe) |
| 20 mg vial | 60 units | 120 units (over one syringe) | 180 units (over one syringe) |
| 30 mg vial | 40 units | 80 units | 120 units (over one syringe) |
| 60 mg vial | 20 units | 40 units | 60 units |
Units on a U-100 insulin syringe. Concentration in each cell is vial mg divided by water mL; for example 15 mg in 2 mL is 7.5 mg/mL.
And 12.5 mg, the tirzepatide rung
| Vial | 1 mL water | 2 mL water | 3 mL water |
|---|---|---|---|
| 10 mg vial | more than the vial holds | more than the vial holds | more than the vial holds |
| 15 mg vial | 83.3 units | 166.7 units (over one syringe) | 250 units (over one syringe) |
| 20 mg vial | 62.5 units | 125 units (over one syringe) | 187.5 units (over one syringe) |
| 30 mg vial | 41.7 units | 83.3 units | 125 units (over one syringe) |
| 60 mg vial | 20.8 units | 41.7 units | 62.5 units |
Where 12 mg sits on the GLP-1 ladders
- Retatrutide calculator: reported ladder 2, 4, 6, 8, 10, 12 mg once weekly, so 12 mg is a step on it.
- Tirzepatide calculator: reported ladder 2.5, 5, 7.5, 10, 12.5, 15 mg once weekly.
- Semaglutide calculator: reported ladder 0.25, 0.5, 1, 1.7, 2.4 mg once weekly.
The titration pages show every rung of each ladder in units at once: retatrutide, tirzepatide, semaglutide. None of this is a recommendation; it is what the licence or the commonly reported protocols say, so you can check your own numbers against them.
Common questions
- How many units is 12 mg on an insulin syringe?
- It depends on the concentration. At 10 mg/mL (for example 20 mg in 2 mL) 12 mg is 120 units, more than one 1 mL syringe holds. At 20 mg/mL (60 mg in 3 mL) it is 60 units. At 15 mg/mL (30 mg in 2 mL) it is 80 units. Units are volume; without the vial strength and the water there is no single answer.
- How much bacteriostatic water should I use for a 12 mg dose?
- Whatever puts the draw between about 10 and 50 units, where the barrel is easiest to read. From a 60 mg vial, 3 mL gives 20 mg/mL and puts 12 mg at 60 units. More water means a bigger, easier draw of the same dose; less water means a smaller one. Most vials take 2 to 3 mL comfortably.
- Is 12 mg the same as 120 units?
- Only at 10 mg/mL, which you get from 10 mg in 1 mL, 20 mg in 2 mL or 30 mg in 3 mL. At that concentration units is simply the dose in mg times ten. At any other concentration the number is different: 80 units at 15 mg/mL, for example.
MethodologyEvery formula and rounding rule, so you can check the mathsRead a syringeU-100 vs U-40, and the 2.5x errorBuild a full protocolThe stack builder at Peptide Bureau, about two minutes
Common conversions
The same three-step maths, pre-filled for the doses people ask about most. Units on a U-100 insulin syringe, where 100 units is 1 mL.
- mg to units calculator Any dose at any concentration, both directions, with the full reference tables
- Units to mg calculator What the units you drew are in milligrams
- 1 mg to units The most-asked conversion, at every common setup
- 2 mg to units Retatrutide starting dose
- 2.5 mg to units Tirzepatide starting dose
- 5 mg to units Tirzepatide step two, MOTS-c, epitalon
- 10 mg to units Tirzepatide step four
- 12 mg to units (this page)
- 15 mg to units Tirzepatide top dose
All calculators and charts
Weight management (GLP-1 family)
- Retatrutide calculator Vial, water and weekly dose to syringe units
- Tirzepatide calculator The 2.5 to 15 mg ladder, converted
- Semaglutide calculator The 0.25 to 2.4 mg ladder, converted
- Cagrilintide calculator Amylin analogue, 0.3 to 4.5 mg weekly
Growth hormone axis
- HGH (somatropin) calculator IU vials to syringe units
- Ipamorelin calculator mcg doses, in mL and units
- CJC-1295 (no DAC) calculator No-DAC and DAC, mcg to units
- CJC-1295 / Ipamorelin blend calculator The 5 mg + 5 mg blend, per component
- Sermorelin calculator Nightly mcg doses to units
- Tesamorelin calculator 1 to 2 mg daily, in units
- Hexarelin calculator mcg doses to units
- IGF-1 LR3 calculator Tens of mcg from very small vials
- AOD-9604 calculator 300 mcg daily, in units
- MOTS-c calculator 5 to 10 mg, two or three times a week
Repair, skin and blends
- BPC-157 calculator mcg doses from a 5 or 10 mg vial
- TB-500 calculator Loading and maintenance, in units
- BPC-157 / TB-500 blend calculator The Wolverine stack, per component
- GHK-Cu calculator 50 to 200 mg vials, mg doses
- GLOW blend calculator The 70 mg blend, split per component
- KLOW blend calculator The 80 mg blend, split per component
Other compounds
- PT-141 calculator 0.5 to 2 mg, as needed
- Melanotan II calculator mcg loading doses to units
- NAD+ calculator 100 to 1,000 mg vials, 25 to 200 mg doses
- Thymosin alpha-1 calculator 1.6 mg twice weekly, in units
- Epitalon calculator Short courses of 5 to 10 mg
- Kisspeptin-10 calculator mcg doses to units
- Glutathione calculator Hundreds of mg, or a 200 mg/mL solution
Dosage charts and schedules
- Peptide reconstitution chart Concentration for every vial and water combination
- Peptide dosing chart Printable unit tables for every compound
- Retatrutide titration schedule 2 to 12 mg in units, stage by stage
- Tirzepatide titration schedule 2.5 to 15 mg in units, stage by stage
- Semaglutide titration schedule 0.25 to 2.4 mg in units, stage by stage
- KLOW dosage and frequency chart The 80 mg blend at 2, 3 and 4 mL, both phases
- GLOW dosage chart The 70 mg blend, units to each peptide
- Wolverine stack dosing chart BPC-157 + TB-500, blend and separate vials
- MOTS-c dosage chart 5 and 10 mg vials at three water volumes
- Tirzepatide reconstitution chart Every vial size, every water volume, the whole ladder
- Retatrutide dosing chart 1 to 12 mg across 10, 20 and 30 mg vials
- Tirzepatide units to mg chart Both directions, every vial and water volume
- Semaglutide units to mg chart The dosage chart in units, both directions
- NAD+ injection dosage chart Per day, per week and frequency, 100 to 1,000 mg vials
- Tesamorelin dosage chart 2, 5 and 10 mg vials, 0.5 to 2 mg in units
- BPC-157 dosage chart mcg doses from 5 and 10 mg vials, four water volumes
- PT-141 dosage chart The 10 mg vial, 0.5 to 2 mg, with uses per vial
- Sermorelin dosage chart Nightly mcg doses from 5, 10 and 15 mg vials
- Printable dosing charts Four one-page charts to save, pin or print
- Peptide storage chart How long powder and mixed vials last, fridge to freezer
Tools
- Peptide calculator The general tool, any compound
- Reconstitution calculator How much water to add, and why it matters
- Bacteriostatic water calculator Pick a volume that lands where you can read it
- How to read an insulin syringe U-100 vs U-40, and the 2.5x error
- The Protocol Pack Free 25-page printable reference
- mg to units calculator Both directions, any concentration, with the reference tables
- 1 mg to units on an insulin syringe The conversion table for every common concentration
- Units to mg calculator The mark you drew, back into milligrams
- 2 mg to units on an insulin syringe 2 mg at every common vial and water volume
- 2.5 mg to units on an insulin syringe 2.5 mg at every common vial and water volume
- 5 mg to units on an insulin syringe 5 mg at every common vial and water volume
- 10 mg to units on an insulin syringe 10 mg at every common vial and water volume
- 12 mg to units on an insulin syringe (this page)
- 15 mg to units on an insulin syringe 15 mg at every common vial and water volume
- Methodology Every formula, assumption and rounding rule
- About Peptulator Who publishes it, independence and contact
- Embed the calculator One line of HTML, free, credit line only
Before you use these numbers This is a unit-conversion tool. It turns a vial strength and a water volume into a concentration, a draw volume and a syringe mark. It does not tell you what to take, whether to take it, or whether a compound is safe for you. Most compounds listed are sold for laboratory research and are not approved for human use. Nothing here is medical advice. Dosing decisions belong with a licensed clinician who knows your history. Always check the strength printed on your own vial rather than trusting a preset.