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The Peptide Effect

Tools

Insulin Syringe Units Converter

Convert between syringe units, mL, and mg. Select your conversion direction, enter a value, and get instant results with the exact formula.

Conversion

IU
IU/mL

Volume

0.1000

mL

Show the math›

mL = units ÷ unitsPerMl

mL = 10 ÷ 100 = 0.1000 mL

Assumptions

  • Default syringe is U-100 (100 units = 1 mL)
  • mg ↔ units conversions require knowing the solution concentration
  • 1 mg = 1,000 mcg — mcg equivalents shown where applicable
  • All conversions are exact arithmetic (no rounding applied)

How This Converter Works

Flow diagram showing how the units converter works
Unit conversion flow — between mg, mcg, IU, mL, and syringe units

The converter uses the syringe calibration factor (units per mL) to translate between volume and syringe markings. For a U-100 syringe, 1 mL = 100 units, so dividing or multiplying by 100 converts between the two.

When converting to or from mg, you also need to know the solution concentration (mg/mL). The converter chains the two steps: units ↔ mL ↔ mg.

Assumptions & Limitations

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Frequently Asked Questions

How many units are in 1 mL?
It depends on the syringe type. A U-100 syringe has 100 units per mL. A U-50 syringe has 50 units per mL. A U-40 syringe has 40 units per mL. For peptide injections, U-100 syringes are the standard.
How do I convert units to mg?
You need to know the solution concentration (mg/mL). First convert units to mL (units ÷ 100 for U-100), then multiply mL by the concentration. For example, 10 units on a U-100 syringe at 5 mg/mL = 0.1 mL × 5 = 0.5 mg.
What is the difference between IU and units?
In the context of insulin syringes, "IU" (International Units) and "units" refer to the same markings on the syringe. The syringe is calibrated by volume — on a U-100 syringe, 1 unit = 0.01 mL. This is different from pharmacological IU used for biologics like HGH or insulin potency.
Can I use this for insulin dosing?
This converter performs generic unit-to-volume math. For insulin specifically, the concentration is standardized (U-100 = 100 units of insulin per mL), so units on the syringe correspond directly to insulin units. For peptides, the concentration varies based on reconstitution. Always consult your prescriber for insulin dosing.

Educational Use Only

This converter is provided for educational and informational purposes. It is not medical advice. Always verify conversions independently before preparing any injection. Consult a healthcare provider for dosing guidance.

Last reviewed: February 2026