What This Calculator Measures
Adjust buffer molarity using stock concentration, target volume, and dilution steps.
By combining practical inputs into a structured model, this calculator helps you move from vague estimation to clear planning actions you can execute consistently.
This calculator converts molarity targets into stock and diluent volumes.
How to Use This Well
- Enter stock and target molarity.
- Add final volume needed.
- Set steps and overage.
- Review stock/diluent volumes.
- Adjust for pipette loss.
Formula Breakdown
V1 = (C2 × V2) ÷ C1Worked Example
- Target 0.1 M from 1 M stock.
- Final volume 500 ml = 50 ml stock.
- Add 5% overage for loss.
Interpretation Guide
| Range | Meaning | Action |
|---|---|---|
| 0–5% | Low loss. | Standard prep. |
| 6–10% | Moderate loss. | Add overage. |
| 11–15% | High loss. | Use more buffer. |
| 15%+ | Very high. | Review technique. |
Optimization Playbook
- Use steps: improve accuracy for small volumes.
- Add overage: cover loss.
- Mix thoroughly: avoid gradients.
- Check pipettes: calibrate regularly.
Scenario Planning
- Baseline: current molarity target.
- Lower target: halve target molarity.
- More volume: increase final volume by 100 ml.
- Decision rule: keep loss under 5%.
Common Mistakes to Avoid
- Mixing up units.
- Skipping overage for loss.
- Using too few steps.
- Not mixing thoroughly.
Implementation Checklist
- Verify molarity units.
- Measure stock volume accurately.
- Add diluent gradually.
- Label buffer clearly.
Measurement Notes
Treat this calculator as a directional planning instrument. Output quality improves when your inputs are anchored to recent real data instead of one-off assumptions.
Run multiple scenarios, document what changed, and keep the decision tied to trends, not a single result snapshot.
FAQ
What is C1V1?
It calculates how much stock to use for a target concentration.
Why use step dilution?
It improves accuracy for large dilution ratios.
Should I add overage?
Yes, to cover transfer losses.