1. What is Millimolar Concentration?

Millimolar (mM) is a unit of concentration equal to one thousandth of a molar (M). It's commonly used in chemistry and biochemistry to express concentrations of solutions when working with small quantities.

2. Conversion Formula

The conversion between millimolar and molar is straightforward:

Where:

• 1 Molar (M) = 1000 Millimolar (mM)
• 1 Millimolar (mM) = 0.001 Molar (M)

3. Practical Applications

Details: Millimolar concentrations are frequently used in biological experiments, medical tests, and pharmaceutical preparations where precise measurements of dilute solutions are required.

4. Using the Calculator

Tips: Enter your concentration value, select the current unit (either mM or M), and the calculator will automatically convert to the other unit. Values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why use millimolar instead of molar?
A: Millimolar is more convenient when working with biological concentrations that are typically in the range of 0.1-100 mM.

Q2: How does this relate to molality?
A: Molarity (M/mM) is concentration per volume of solution, while molality is per mass of solvent. They differ in concentrated solutions.

Q3: What's the difference between mM and μM?
A: 1 mM = 1000 μM (micromolar). μM is used for even more dilute solutions.

Q4: Are there other common concentration units?
A: Yes, including micromolar (μM), nanomolar (nM), and percent concentration (% w/v or % v/v).

Q5: How precise should my measurements be?
A: For most applications, 4 significant figures are sufficient, though analytical chemistry may require more precision.