mL to units Calculator
Convert a measured volume (mL) into a dose in units using the medication concentration (units/mL). Common examples include insulin (U-100/U-40) and heparin.
How mL to units Conversion Works
Some medications use units (U) instead of milligrams. To find the dose in units, you multiply the volume you are giving (mL) by the concentration (units per mL) printed on the product label.
This is especially common with insulin (often U-100 or U-40) and heparin (which may be supplied in a range of concentrations). Always verify the concentration before calculating, because the same mL can represent very different unit doses.
Formula
Worked Examples
Example 1: U-100 insulin, 0.5 mL. How many units?
Example 2: Heparin 5,000 units/mL, draw 1.5 mL. How many units?
Example 3: U-40 insulin, 2 mL. How many units?
When This Calculator Is Used
- •Converting insulin volumes (mL) into unit doses (U)
- •Calculating heparin injection doses labeled in units/mL
- •Double-checking dose documentation and administration volumes
- •Teaching students concentration-based calculations with units
Clinical safety note: Units-based medicines are high-risk. Always verify the concentration on the label (e.g., U-100 vs U-40; heparin units/mL varies widely) and follow local independent-check procedures where required. This calculator supports checking but does not replace clinical judgement.
Related Calculators
Frequently Asked Questions
Clinical reminder: Always follow local protocols and consult medication information sheets. These examples are for calculation practice only.
References & Sources
References focus on concentration-based medication calculations and unit-based dosing examples commonly used in nursing and pharmacy education.
International Standards
Australia
United States
Clinical disclaimer: Always verify the product label and local policy. This tool supports calculation checking and education only.