# Protein Concentration Converter (mg/mL ↔ µM ↔ %) One-step protein unit conversion across mg/mL, µg/mL, g/L, % w/v, µM, nM, mM, and pmol/µL via molecular weight, with bench landmarks. Educational use only. > Canonical page: https://elysiatools.com/en/tools/protein-concentration-converter - **Category:** Education - **Keywords:** protein concentration converter, mg ml to micromolar, micromolar to mg ml protein, percent w/v protein concentration, protein molarity calculator, pmol per microliter to micromolar, bsa concentration conversion, protein unit conversion table, molecular weight kda conversion, biochemistry calculator, lab calculator ## Overview Convert protein concentrations between mg/mL, µg/mL, g/L, % w/v, µM, nM, mM, and pmol/µL using the protein molecular weight in kDa. The tool returns all eight equivalent units and is intended for educational use and experiment planning. ## Inputs - **Protein Concentration** (number): Value in the unit selected below. - **Concentration Unit** (select): Unit of the entered value. - **Molecular Weight (kDa)** (number): Protein molecular weight (monomer) in kDa — drives mass ↔ molar conversions. - **Decimal Places** (number) ## When to use - Convert a protein stock from mg/mL to µM for an assay or binding experiment. - Translate a molar concentration such as µM into mg/mL or % w/v for solution preparation. - Check equivalent protein concentration units when comparing protocols, labels, or calculation notes. ## How it works - Enter the protein concentration and select its current unit. - Enter the protein monomer molecular weight in kDa. - Choose the number of decimal places for the displayed values. - Review the JSON result containing equivalent values in all eight supported units. ## Use cases - Convert BSA stock concentrations from mg/mL to molar units for biochemical assays. - Prepare protein solutions from protocol targets stated in µM, mM, or % w/v. - Compare protein concentration values across reagent labels and laboratory protocols. ## Frequently asked questions ### Which protein concentration units are supported? The converter supports mg/mL, µg/mL, g/L, % w/v, µM, nM, mM, and pmol/µL. ### Why is molecular weight required? Molecular weight is needed to convert between mass-based units and molar units such as µM, nM, and mM. ### What formula converts mg/mL to µM? For a protein, µM = mg/mL × 1000 ÷ molecular weight in kDa. ### How are % w/v and mg/mL related? For aqueous concentration notation, 1% w/v equals 10 mg/mL, or 1 g/L. ### Is this tool intended for clinical or diagnostic decisions? No. It is provided for educational use and experiment planning, not clinical or diagnostic decisions. ## Related tools - [PCR Annealing Temperature Calculator (Ta = Tm − 5°C)](https://elysiatools.com/en/tools/annealing-temperature-calculator): PCR Ta by the simple rule (lower primer Tm − 5°C) or the Rychlik 1990 formula (0.3·Tm_primer + 0.7·Tm_product − 14.9), with a ±3°C gradient window and primer-Tm mismatch warning. Derived from Rychlik 1990, Innis & Gelfand 1990, Lorenz 2012. 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