In our recent question and answer, the pharmacist discusses just how to convert insulin systems to milligrams and also milliliters.

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Peggy asked

How execute you transform the Humalog insulin in between units and also milligrams? What around conversion come milliliters?



It"s exceptionally uncommon to view insulin listed in milligrams (mg). The insulin commodities you obtain at the pharmacy will always be labeled in units, or together a concentration in terms of units (e.g., U100 way 100 systems of insulin per 1mL that liquid).

The ax "units" refers to International devices (IU), which is a measure of the "biological activity" of a specificdrug or substance. Global Units are offered over a traditional metric measure up (such as milligrams) to do it much easier to compare various forms of the same drug. Essentially, the use of international Units is a way to standardize.

For example, you may see "Vitamin A" accessible as a range of develops in"over the counter" supplements, including:


Although castle both carry out "Vitamin A", lock have various biological tasks (i.e., potencies) concerning how lot "Vitamin A" they in reality provide. Therefore, they have actually been standardization with international Units together follows:

One global Unit (IU) equals:

0.3 mcg that retinol0.6 mcg that beta-carotene

In the very same vein, because that Vitamin E, one worldwide Unit (IU) equals:

0.67 mg of d-alpha-tocopherol0.9 mg of dl-alpha-tocopherol

Units to Milligrams Insulin Conversion


The conversion factor for person insulin is: One worldwide Unit (IU) equals 0.0347 mg the insulin.

International Units room far simpler to understand, particularly when it pertains to dosing, for insulin. Having a prescription speak "inject ten units" is much easier to understand than "inject 0.347 mg".

Similarly, when listed as a concentration, such as the generally used U100 (which method 100 units of insulin every 1mL), devices correspond tidily through a volume (e.g., 20 devices is included in 0.2 mL).

Nevertheless, if you are so inclined to convert in between units of insulin and milligrams, you have the right to use this handy conversion tool:

Insulin: units To Mg Tool

Type a value in any type of of the areas to convert in between Insulin measurements:

international Units (IU)
Milligrams (mg)

*Note: The tool rounds come the "hundredths" ar for milligrams

Converting Insulin Milliliters to Units

While we space on the subject of converting devices of insulin to milligrams, it is necessary to comment on a common source of confusion regarding insulin dosing, i m sorry is the relationship between milliliters and units.

Insulin assets are listed in regards to a concentration, such together U100 or U500.

U40 was standing for:

40 systems of insulin per 1mL (milliliter)

U100 stands for:

100 systems of insulin per 1mL (milliliter)

U500 was standing for:

500 devices of insulin every 1mL (milliliter)

So, if you have a U100 insulin product, and also you should inject 50 units, that would certainly come out to 0.5 mL.

Similarly, if you have actually a U500 insulin product, and you have to inject 50 units, that would certainly come the end to 0.1 mL.

You can convert between units and also mL because that the most common type of insulin concentration, U100, below.

U100 Insulin to mL Converter

Type in systems of U100 insulin to transform to mL:


Milliliters: 0

If you are using syringes to draw up and inject her insulin, it is vitally necessary to be sure you are using the correct ones to prevent dosing errors.

For example, you cannot usage U100 syringes if you room utilizing a U500 insulin product. Drawing up half-way, to 0.5 mL, ~ above a U100 syringe will equal a sheep of 50 systems of a U100 insulin. However, law the same (drawing approximately 0.5mL) v a U500 product would yield 250 units!

Insulin Analogs Vs. Person Insulin


There is additionally another, really important reason, why insulin assets aren"t provided in milligrams and also that needs to do with the visibility of Insulin analogs.

Insulin analogs and human insulin technically use the exact same conversion (1 Unit = 0.0347 milligrams) and are considered "equipotent".

Nevertheless, there are significant differences in the pharmacokinetic profiles of every (e.g., just how they are soaked up and metabolized).

Human Insulin

"Human" insulins include:

Regular insulin (example commodities include Humulin R and also Novolin R).NPH insulin (example commodities include Humulin N and also Novolin N).

Regular human insulin products are considered "fast-acting", through an start of action around 30 minutes. High concentration constant human insulin (U500), have actually a slightly faster beginning of action andduration that action.

NPH (Neutral Protamine Hagedorn) insulin is additionally known together isophane insulin and is intermediate-acting. That is continual human insulin with added zinc and protamine, which reasons a delay in absorption and prolongs the expression of action.

Insulin Analogs

Insulin analogs are transformed forms that insulin and are produced via hereditary engineering. Analogs are produced in such a way to change their pharmacokinetic characteristics from human insulin.

For example, over there are number of "rapid" acting insulin analogs, and also have a faster beginning of activity than person insulin products. This include:

There are additionally long-acting insulin analogs, v alonger duration of activity than NPH insulin. These include:

Conversions in between Human and Analog Insulin

Although every insulin assets are considered "equipotent" in regard come the fact that 1 unit of each amounts to 0.0347 mg, as explained above, they have far-ranging differences in your onset that action, time to optimal effect, and duration that action.

Therefore, the doesn"t make lot sense to quantify them all in the same means in terms of their milligram toughness as it could easily cause confusion and also dosing errors.

Most insulin products, in their prescribing information, talk about how to transform or switch in between different types, with many recommending a one-to-one switch (with caveats).

For example, the prescribing details for Levemir (a long-acting insulin) recommends the following if you are switching from an NPH insulin:

"For patients with kind 1 or form 2 diabetes ~ above basal-bolus treatment, transforming the basal insulin come LEVEMIR can be excellent on a unit-to-unit basis. The sheep of LEVEMIR need to then be readjusted to achieve glycemic targets. In part patients with type 2 diabetes, an ext LEVEMIR might be forced than NPH insulin."Levemir parcel Insert

Final Words

To pave it every up, there normally is not a need to convert in between units and milligrams that insulin, yet we have provided a tool if you wish to use it.

See more: Garlic Cloves To Powder: How Much Garlic Salt Equals 1 Clove Of Garlic?

More commonly, the is crucial to convert in between units and also milliliters, and we have provided tools in this short article to make that basic for you together well.