Dilution for Injection Calculator

Summary

Enter your drug amount and target concentration to instantly find how much diluent to add.

How it works

1. Enter the amount of drug available in the vial (e.g., 500 mg).
2. Enter the stock concentration or reconstituted volume if already dissolved.
3. Enter the target concentration you need in the final syringe or bag.
4. The calculator computes the drug volume to draw up and the diluent volume to add.
5. Review the final volume and verify the resulting concentration before preparing.

Use cases

• Preparing IV antibiotics at a specific mg/mL concentration.
• Diluting a concentrated vial to a safe infusion rate.
• Reconstituting powder-form drugs to a target concentration.
• Checking nurse or pharmacy prep calculations before administration.
• Teaching pharmacy or nursing students medication math.
• Calculating diluent for small-volume pediatric doses.

Frequently Asked Questions