Free conversion chart

mg to units chart.

A complete mg to units conversion chart for U-100 insulin syringes, for 2 to 30 mg vials mixed with 1, 2 or 3 ml of bacteriostatic water. Use the live calculator for anything else.

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For in-vitro laboratory research use only. Not for human or veterinary use, and not intended to diagnose, treat, cure, or prevent any disease.

Conversion chart

U-100 units by vial, water and amount

2 mg vial: U-100 units for each amount. “>100” means more than one 1 ml syringe.
Water	Concentration	100 mcg	250 mcg	500 mcg	1 mg	2.5 mg	5 mg
1 ml	2 mg/ml	5	12.5	25	50	>100	>100
2 ml	1 mg/ml	10	25	50	100	>100	>100
3 ml	0.67 mg/ml	15	37.5	75	>100	>100	>100

5 mg vial: U-100 units for each amount. “>100” means more than one 1 ml syringe.
Water	Concentration	100 mcg	250 mcg	500 mcg	1 mg	2.5 mg	5 mg
1 ml	5 mg/ml	2	5	10	20	50	100
2 ml	2.5 mg/ml	4	10	20	40	100	>100
3 ml	1.67 mg/ml	6	15	30	60	>100	>100

10 mg vial: U-100 units for each amount. “>100” means more than one 1 ml syringe.
Water	Concentration	100 mcg	250 mcg	500 mcg	1 mg	2.5 mg	5 mg
1 ml	10 mg/ml	1	2.5	5	10	25	50
2 ml	5 mg/ml	2	5	10	20	50	100
3 ml	3.33 mg/ml	3	7.5	15	30	75	>100

15 mg vial: U-100 units for each amount. “>100” means more than one 1 ml syringe.
Water	Concentration	100 mcg	250 mcg	500 mcg	1 mg	2.5 mg	5 mg
1 ml	15 mg/ml	0.67	1.67	3.33	6.67	16.67	33.33
2 ml	7.5 mg/ml	1.33	3.33	6.67	13.33	33.33	66.67
3 ml	5 mg/ml	2	5	10	20	50	100

20 mg vial: U-100 units for each amount. “>100” means more than one 1 ml syringe.
Water	Concentration	100 mcg	250 mcg	500 mcg	1 mg	2.5 mg	5 mg
1 ml	20 mg/ml	0.5	1.25	2.5	5	12.5	25
2 ml	10 mg/ml	1	2.5	5	10	25	50
3 ml	6.67 mg/ml	1.5	3.75	7.5	15	37.5	75

30 mg vial: U-100 units for each amount. “>100” means more than one 1 ml syringe.
Water	Concentration	100 mcg	250 mcg	500 mcg	1 mg	2.5 mg	5 mg
1 ml	30 mg/ml	0.33	0.83	1.67	3.33	8.33	16.67
2 ml	15 mg/ml	0.67	1.67	3.33	6.67	16.67	33.33
3 ml	10 mg/ml	1	2.5	5	10	25	50

Questions

Conversion chart FAQ

How do I read the mg to units chart?

Find your vial size, then the row for the water you added. Each column is an amount; the number is how many units to draw on a U-100 insulin syringe.

What if my vial or amount isn't in the chart?

Use the calculator at the top of the page. It works for any vial mg, water ml and amount in mg or mcg.

Why does adding more water increase the units?

More water spreads the same mg through more liquid, so each unit holds less. You draw more units to get the same amount.

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