To make a measurement read at an exact number of units, work backwards from the units you want. Pick your vial amount, the amount you want to measure, and the units you want to land on (for example 20 units). This reverse calculator returns the precise amount of bacteriostatic water to add so the measurement lands exactly there on a U-100 insulin syringe.
Reverse BAC Water Calculator: Units to Water
Choose the amount you want to measure and the exact units you want to land on. We'll tell you precisely how much bacteriostatic water to add so it lands there.
Which peptide?
What size is your vial?
How much do you measure each time?
Units you want to land on
The mark you want to fill to on a U-100 insulin syringe.
Enter a vial amount, the amount to measure, and target units to see the exact amount of bac water to add.
This is general reconstitution math for research and educational use only. BACwater.ai is not a medical company, and this is not medical advice. Always check your product's own paperwork and talk to your doctor before making any health decision. Read the full disclaimer.
The units you want set the volume you measure (0 units = 0.00 mL on a U-100 syringe). We then pick the bac water so the concentration puts your amount in exactly that volume.
Related guides
Quick reference
| Target units | Bac water (5 mg vial, 250 mcg) | Concentration |
|---|---|---|
| 10 units | 2 mL | 2.5 mg/mL |
| 15 units | 3 mL | 1.67 mg/mL |
| 20 units | 4 mL | 1.25 mg/mL |
| 25 units | 5 mL | 1 mg/mL |
Example: a 5 mg vial measured at 250 mcg. More bac water spreads the same amount across more units.
Related questions
How do I make a measurement an exact number of units?
Work backwards. Decide the units you want to land on, then set the bac water so the concentration matches. This reverse calculator does that: enter the vial amount, the amount to measure, and target units, and it returns the exact water to add.
Why would I want a specific number of units?
Round numbers like 10 or 20 units are easier to measure accurately and harder to misread than an odd volume like 0.17 mL. Choosing the units first makes every measurement simpler.
What if the calculator asks for a lot of water?
Very high target units at a small amount can require a large volume of bac water, which spreads the peptide thin. If the amount looks impractical, choose fewer units.