40 units to mL
The U-100 insulin syringe guide covers 40 units to mL, the syringe that fits and peptide amounts at common strengths.
On a U-100 insulin syringe, 40 units is 0.4 mL.
If you use a U-40 syringe, those same 40 units equal 1 mL. A U-100 syringe holding 0.5 mL (50 unit) will fit.
What amount of peptide is in 40 units?
Each unit on a U-100 syringe is 0.01 mL, because 100 units fit in 1 mL. Units show you volume only. The strength of your mix determines how much peptide that volume holds.
| Strength of your mix | Amount in that volume | In mcg |
|---|---|---|
| 1 mg/mL | 0.4 mg | 400 mcg |
| 2 mg/mL | 0.8 mg | 800 mcg |
| 2.5 mg/mL | 1 mg | 1,000 mcg |
| 5 mg/mL | 2 mg | 2,000 mcg |
| 10 mg/mL | 4 mg | 4,000 mcg |
Which line do you draw to?
With a syringe of 0.3 or 0.5 mL, every line equals 1 unit; count 40 lines. For a 1 mL syringe, every line marks 2 units; 40 units equals 20 lines.