Concentration Converter

About Concentration

Concentration is a measure that specifies the amount of a given substance present in a mixture of another substance. Concentration is used often in chemistry, medicine, and environmental science to specify the amount of solute in a solution.

• Gram per liter (g/L) – A common unit of mass concentration.
• Milligram per liter (mg/L) – Commonly used in environmental testing.
• Milligram per deciliter (mg/dL) – Common in blood tests (e.g. glucose concentration).
• Microgram per milliliter (µg/mL) – Used in pharmacology and toxicology.
• Nanogram per milliliter (ng/mL) – Convenient for trace concentrations, e.g. hormones.
• Percent mass/volume (% w/v) – Expresses grams of solute per 100 mL of solution.
• Parts per million (ppm) – One part per million parts of solution; 1 ppm ≈ 1 mg/L.
• Parts per billion (ppb) – For very dilute concentrations; 1 ppb ≈ 1 µg/L.
• Parts per trillion (ppt) – Ultra-trace levels, e.g. for cleanroom applications.

Concentration Units

Concentration units are employed for the expression of an amount of substance within a specific volume or weight of a solution or mixture. Concentration units vary based on the application, such as chemistry, biology, environmental science, or medicine.

Some of the most commonly used units are Milligram per liter (mg/L), Gram per liter (g/L), and Kilogram per liter (kg/L), which denote the weight of an ingredient dissolved in a liter of solution. For decreased volumes, units like Milligram per deciliter (mg/dL) and Gram per deciliter (g/dL) are used, especially in clinical laboratory tests.

Where very small quantities are involved, mass per volume units such as Microgram per milliliter (µg/mL) and Nanogram per milliliter (ng/mL) are commonly employed. Such units are widely utilized in pharmacy as well as toxicology, where very low levels of chemicals need to be accurately measured.

In addition to mass per volume units, percentage-measurements such as Percent mass/volume (% w/v) are generally applied for measuring concentrations in drugs as well as in solutions.

Apart from that, parts per notation units are a method of describing highly diluted concentrations: Parts per million (ppm), Parts per billion (ppb), and Parts per trillion (ppt). These units are vital in environmental science and measuring water quality, where trace amounts of impurities must be quantified.

Knowing the units of concentration is necessary for accurate measurement and reporting in scientific research.