Compounding Concentration Calculator
Calculate dilution volumes using the C1V1 = C2V2 formula for pharmacy compounding and lab preparations.
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
Results
Volume of Stock Needed (V1)
10 mL
Volume of Diluent
90 mL
How to Use This Calculator
- Enter the Stock Concentration (C1) in mg/mL — the concentration of your starting solution.
- Enter the Available Stock Volume in mL (for reference; this does not affect the calculation).
- Enter the Desired Concentration (C2) in mg/mL — the target concentration of the final preparation.
- Enter the Desired Final Volume (V2) in mL — the total volume you need to prepare.
- Review the Volume of Stock Needed (V1 in mL) and Volume of Diluent to add — combine these two volumes to produce the final preparation at the target concentration.
How the result changes with Stock Concentration (C1)
| Stock Concentration (C1) | Volume of Stock Needed (V1) | Volume of Diluent |
|---|---|---|
| 10,000 | 0.1 mL | 99.9 mL |
| 35,000 | 0.03 mL | 99.97 mL |
| 65,000 | 0.02 mL | 99.99 mL |
| 90,000 | 0.01 mL | 99.99 mL |
What each input means
- Stock Concentration (C1)
- Concentration of the stock solution in mg/mL (or any consistent unit).
- Available Stock Volume
- Total volume of stock solution available (for reference only).
- Desired Concentration (C2)
- Target concentration of the final solution in mg/mL.
- Desired Final Volume (V2)
- Desired total volume of the final diluted solution in mL.
How this is calculated
Formula
C1 × V1 = C2 × V2 → V1 = (C2 × V2) / C1Worked example, using the default values
- Identify Input Parameters4 parametersStock Concentration (C1) = 100, Available Stock Volume = 500, Desired Concentration (C2) = 10, Desired Final Volume (V2) = 100 = 4 input(s) provided
- Calculate Volume of Stock NeededVolume of Stock Needed10 = 10
- Calculate Volume of DiluentVolume of Diluent90 = 90
- Calculate Dilution FactorDilution Factor10 = 10
Engine last updated . Checked against 1 independently-derived test — how we verify calculators.
Related Calculators
The questions that sit next to this one — chosen by subject, including calculators filed under a different category.
Pediatric Liquid Medication Calculator
Convert prescribed milligram doses to milliliter volumes for liquid medications based on the drug concentration.
PharmacyVancomycin Dosing Calculator
Calculate vancomycin dosing based on patient weight, renal function (CrCl), and estimated pharmacokinetic parameters.
ChemistryDilution Calculator (C1V1=C2V2)
Calculate required volumes for solution dilution using the C1V1 = C2V2 equation. Essential for lab work and preparing standard solutions.
LaboratorySerial Dilution Calculator
Calculate final concentration, diluent volume per tube, and total volume needed for serial dilution series in the laboratory.
DeFi & CryptocurrencyYield Farming APY Calculator
Convert APR to actual APY based on compounding frequency. See how daily, weekly, or monthly compounding affects your DeFi yield farming returns.
More in Medical & Clinical.