Protein Concentration Calculator

Protein concentration is critical in biochemistry, pharmaceutical manufacturing, and clinical diagnostics. Common measurement methods include Bradford assay, BCA assay, and UV absorbance at 280 nm.

To use the Protein Concentration Calculator, enter your Protein Mass (Amount), Mass Unit, Solution Volume and other values. The calculator instantly computes Concentration in mg/ml, Concentration in µg/ml and more. Results update in real time as you change any input — no submit button needed.

How to Use This Calculator

Enter your Protein Mass (Amount) (e.g. 5), Mass Unit — select from Milligrams (mg), Micrograms (µg), Grams (g), Solution Volume (e.g. 10), and Volume Unit — select from Milliliters (ml), Microliters (µl), Liters (L). Results update instantly — no submit button needed. Use metric or imperial units as labeled. For the most accurate result, measure height and weight in the morning without shoes.

The Formula

Concentration (mg/ml) = Mass (mg) ÷ Volume (ml)

µg/ml = mg/ml × 1000 | % w/v = g per 100 ml = mg/ml × 0.1

Worked Example

5 mg protein dissolved in 10 ml solution: 5 ÷ 10 = 0.5 mg/ml = 500 µg/ml = 0.05% w/v = 0.5 g/L.

Understanding Your Result

Current evidence-based protein recommendations: Sedentary adults: 0.8 g/kg body weight (RDA minimum). Active adults: 1.2–1.6 g/kg. Athletes or those building muscle: 1.6–2.2 g/kg. Older adults (65+): 1.2–1.6 g/kg to counter sarcopenia. The RDA (0.8 g/kg) is the minimum to prevent deficiency — not the optimal intake for body composition or longevity. Protein at each meal (25–40g) maximizes muscle protein synthesis; distribution matters as much as total daily amount.