What U-100 means
On a U-100 syringe scale, 100 marked units correspond to 1 millilitre of liquid. The markings describe volume on that syringe scale; they do not automatically describe milligrams or micrograms.
100 U-100 syringe units = 1 mL
1 syringe unit = 0.01 mL
1 syringe unit = 0.01 mL
| Syringe units | Liquid volume |
|---|---|
| 5 units | 0.05 mL |
| 10 units | 0.10 mL |
| 25 units | 0.25 mL |
| 50 units | 0.50 mL |
| 100 units | 1.00 mL |
Check the syringe itself
Barrel capacity and marking intervals vary. A 0.3 mL, 0.5 mL and 1 mL U-100 syringe may all use a U-100 scale but display different ranges and increments.
Do not confuse units: syringe-scale units are a volume marking. Product international units are a measure of biological activity. They are not automatically interchangeable.