How to Calculate Concentration

What is Concentration?

Solution concentration calculators convert between molarity (mol/L), mass concentration (g/L), and percent concentration (% w/v). Used in chemistry, biology, pharmacy, and food science.

Formula

Molarity (M) = Moles / Liters | Molality (m) = Moles / kg solvent | PPM = (mg solute / L solution) × 1,000 for dilute aqueous

Step-by-Step Guide

1Molarity (M) = Moles of solute / Volume of solution (L)
2Mass conc (g/L) = Molarity × Molar mass
3% w/v = (mass of solute g / volume mL) × 100
4Dilution: C₁V₁ = C₂V₂

Worked Examples

Input

10g NaCl (M=58.44) dissolved in 250mL water

Result

Molarity = (10/58.44)/0.250 = 0.684 mol/L = 0.684 M

Frequently Asked Questions

What is Concentration Calc?

Solution concentration calculators convert between molarity (mol/L), mass concentration (g/L), and percent concentration (% w/v). Used in chemistry, biology, pharmacy, and food science

How accurate is the Concentration Calc calculator?

The calculator uses the standard published formula for concentration calc. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Concentration Calc calculator use?

This calculator works with inches, percentages. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Concentration Calc calculator use?

The core formula is: Molarity (M) = Moles of solute / Volume of solution (L). Each step in the calculation is shown so you can verify the result manually.

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