Convert milligrams per milliliter to percentage, or percentage to mg/mL, using the mass/volume relationship that 1% w/v equals 1 g per 100 mL of final solution, or 10 mg/mL.

Uses mass/volume percent: 1% w/v = 1 g per 100 mL of final solution. This is not mass percent or a medicine dose.

Calculator Operations Required Inputs
Convert % w/v to mg/mL Percentage (% w/v)
Convert mg/mL to % w/v Concentration (mg/mL)

mg to Percentage Formula

The following formula converts concentration in mg/mL to mass/volume percent (% w/v).

% (w / v) = (c (mg / mL)) / (10)
  • Where % w/v is grams of solute per 100 mL of final solution
  • c is the concentration in milligrams per milliliter (mg/mL)

To convert mg/mL to % w/v, divide by 10. To convert % w/v to mg/mL, multiply by 10. Total milligrams alone are insufficient without final solution volume.

mg/mL ↔ % Conversion Table (1% = 10 mg/mL)
mg/mL to % % to mg/mL
1 mg/mL = 0.1%0.01% = 0.1 mg/mL
2 mg/mL = 0.2%0.02% = 0.2 mg/mL
2.5 mg/mL = 0.25%0.05% = 0.5 mg/mL
5 mg/mL = 0.5%0.1% = 1 mg/mL
10 mg/mL = 1%0.12% = 1.2 mg/mL
15 mg/mL = 1.5%0.2% = 2 mg/mL
20 mg/mL = 2%0.25% = 2.5 mg/mL
25 mg/mL = 2.5%0.3% = 3 mg/mL
30 mg/mL = 3%0.5% = 5 mg/mL
40 mg/mL = 4%0.9% = 9 mg/mL
50 mg/mL = 5%1% = 10 mg/mL
60 mg/mL = 6%1.5% = 15 mg/mL
75 mg/mL = 7.5%2% = 20 mg/mL
80 mg/mL = 8%3% = 30 mg/mL
100 mg/mL = 10%4% = 40 mg/mL
120 mg/mL = 12%5% = 50 mg/mL
150 mg/mL = 15%7.5% = 75 mg/mL
200 mg/mL = 20%10% = 100 mg/mL
250 mg/mL = 25%20% = 200 mg/mL
500 mg/mL = 50%50% = 500 mg/mL
Formulas (per the calculator): % = (mg/mL) ÷ 10, and mg/mL = % × 10 (i.e., 1% = 10 mg/mL).

mg to Percentage Definition

Mass/volume percent (% w/v) expresses grams of solute per 100 mL of final solution. It differs from mass percent (% w/w), which uses the total mass of the solution.

mg to Percentage Example

How to convert mg to percentage?

  1. First, determine the concentration.

    Measure milligrams per milliliter of final solution; for example, 25 mg/mL.

  2. Next, convert to grams per milliliter.

    Divide mg/mL by 1000: 25 mg/mL = 0.025 g/mL.

  3. Finally, calculate the percentage.

    Multiply g/mL by 100 to express grams per 100 mL: 0.025 × 100 = 2.5% w/v.

FAQ

What is a milligram?

A milligram is defined as the unit of mass equal to 1/1000th of a gram.