Strength Conversion Calculator
Convert between %, ratio, wv, ww formats for pharmacy compounding
Compounding
Strength Conversion
Input Format
Output Format
Common Pharmacy Strengths
Conversion Result
1 Percentage (%) =
Enter Values
Interpretation
Common Equivalents
1%1 g/100 mLwv
1:1001%ratio
1 mg/mL0.1%wv
5%50 mg/mLwv
0.1%1 mg/mLwv
1:10000.1%ratio
1:10,0000.01%ratio
Compounding Tips
•
Always verify the final concentration matches prescription•
Use appropriate precision for balance measurements•
Document all calculations in compounding recordStrength Conversion Reference
Percentage Strengths
• 1% = 1 g/100 mL (wv)
• 1% = 1 g/100 g (ww)
• 1% = 1 mL/100 mL (vv)
• For wv: % = (g solute/100 mL) × 100
Ratio Strengths
• 1:X means 1 part in X parts total
• 1:1000 = 0.1%
• 1:10,000 = 0.01%
• Convert to %: (1/X) × 100
Weight/Volume
• Common format: mg/mL
• 1 mg/mL = 0.1%
• 10 mg/mL = 1%
• 50 mg/mL = 5%