Water planner
Choose how many units you would like each dose to be, and see how much water to add to the vial to get there. Handy when you want round numbers that are easy to read on the syringe.
Other round numbers
How it works
This runs the dose calculator in reverse. More water makes a weaker mix, so the same dose takes up more units. Less water makes a stronger mix and fewer units.
Very small volumes of water are hard to measure accurately and can make doses tiny on the syringe. Check the amount of water with your healthcare professional before mixing.
This tool does arithmetic on numbers you enter. It does not suggest or check doses. Your dose and how to mix it come from your healthcare professional.
Other tools
Dose calculator
Vial, water and your prescribed dose in. The mark to draw to out, with a picture of the syringe.
ConverterUnit converter
mcg, mg, mL and syringe units on one screen. Type any one and see the rest.
ReferenceSyringe guide
What every line on a 30, 50 and 100-unit insulin syringe means, with tables for each.