1 mg to mL

Units and mL measure volume, mg and mcg measure amount, so the conversion depends on how concentrated the vial is. The answer below states the vial and water it assumes; change them in the converter.

Medically reviewed by Juan Pablo Frías, MD · 3 Oct 2026 · DisclosureUpdated 3 Oct 2026Educational use only

1 mg =

0.2mL

at 5 mg/mL (10 mg + 2 mL water)

Shown on a 0.3 mL (30-unit) U-100 syringe: 20 units = 0.2 mL.

The working

10 mg ÷ 2 mL = 5 mg/mL1 mg ÷ 5 mg/mL = 0.2 mL

This uses 10 mg + 2 mL of bacteriostatic water as an example. Your vial label and the water you added decide the real answer.

Math only. It does not recommend a dose.

Convert another amount (mg to mL)

Amount

Vial

Water

Result

0.2mL

10 mg ÷ 2 mL = 5 mg/mL1 mg ÷ 5 mg/mL = 0.2 mL

mg to mL: nearby values

Each column is a different concentration (vial mg ÷ water mL). The highlighted row is 1 mg.

mg to mL by concentration
mg	2.5 mg/mL5 mg + 2 mL	5 mg/mL10 mg + 2 mL · used above	10 mg/mL20 mg + 2 mL	20 mg/mL60 mg + 3 mL
0.25 mg	0.1	0.05	0.025	0.013
0.5 mg	0.2	0.1	0.05	0.025
1 mg	0.4	0.2	0.1	0.05
2 mg	0.8	0.4	0.2	0.1
2.5 mg	1	0.5	0.25	0.125
5 mg	2	1	0.5	0.25
7.5 mg	3	1.5	0.75	0.375
10 mg	4	2	1	0.5

More conversions

mg to mL

1 mg 2.5 mg 5 mg

1 mg to mcg 1 mg to units 1 mL to units 0.25 mg to units 0.5 mg to units 2 mg to units Peptide reconstitution calculatorVial, water and dose to units All convertersmcg, mg, mL and units

Sources

1Metric (SI) Prefixes (NIST Reference on Constants, Units, and Uncertainty)National Institute of Standards and Technology (NIST) · 2025physics.nist.govAccessed 2 Oct 2026
2BASAGLAR (insulin glargine) injection, prescribing information (DailyMed)U.S. Food and Drug Administration / DailyMed (Eli Lilly and Company label) · 2026dailymed.nlm.nih.govAccessed 2 Oct 2026

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