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Solution Dilution Calculator.
Calculate final volume and solvent volume with C1V1 = C2V2.
输入数值
输入时结果会更新。
Educational formula calculator. Keep units consistent and verify assumptions against your laboratory or course specification.
Use Cases
Preparing a working solution from a stock
When you have a concentrated stock solution and need a specific lower concentration for an experiment, this calculator tells you the final volume and how much solvent to add.
Example: Stock 5 M NaCl, want 1 M, enter stock volume 10 mL to get final volume 50 mL and solvent 40 mL.
Checking the required stock volume for a target concentration
If you know the desired final volume and target concentration, you can use the calculator to find the stock volume needed, then add solvent to reach that final volume.
Example: Need 100 mL of 0.5 M from 2 M stock: enter stock concentration 2 M, target 0.5 M, and stock volume 25 mL to get final volume 100 mL.
Frequently Asked Questions
- How does the Solution Dilution Calculator work?
- It uses the dilution equation C1V1 = C2V2. You enter the stock concentration (C1), stock volume (V1), and target concentration (C2). The calculator solves for the final volume (V2) and then subtracts V1 to give the solvent volume needed.
- What units can I use for concentration and volume?
- The calculator accepts any concentration units (e.g., M, mM, µM) and any volume units (e.g., L, mL, µL). Ensure that the stock and target concentrations use the same unit, and the stock volume is in the unit you want for the final volume.
- Can I use this calculator for serial dilutions?
- This calculator is designed for a single dilution step. For serial dilutions, you would apply the calculation repeatedly, using the diluted solution as the new stock for the next step.
Tips & Common Mistakes
Tips
- Always double-check that your stock and target concentrations are in the same unit before entering them.
- For accurate results, measure the stock volume precisely and add solvent slowly while mixing to achieve the target concentration.
- Remember that the solvent volume is the difference between the final volume and the stock volume, so ensure your stock volume is less than the final volume.
Common Mistakes to Avoid
- Using different concentration units for stock and target (e.g., M vs mM) without converting, leading to incorrect results.
- Entering the stock volume as the final volume, which would give a solvent volume of zero or negative.
- Forgetting that the final volume includes the stock volume, so the solvent volume is not the final volume but the additional amount needed.
Last updated: August 13, 2026