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Dilution calculator

Prepare precise dilutions with unit-aware ratios and steps.

Summary

Dilutions follow the mass balance relationship (C1V1 = C2V2) and are commonly documented per USP <795> and USP <797> compounding guidance. Confirm formulas with your site SOPs.

Provide stock concentration, target concentration, and final volume to calculate the required stock volume and the diluent volume. Use consistent units throughout.

Step-by-step: Calculate dilution volumes

  1. Confirm units for concentration and volume

    Use consistent units for both concentrations (e.g., mg/mL) and the final volume (e.g., mL).

  2. Enter stock and target concentrations

    Provide the starting concentration and the desired target.

  3. Enter the final volume

    Calculate required stock volume and the diluent volume.

Dilution inputs

Provide stock concentration, target concentration, and final volume.

Dilution results

C1 * V1 = C2 * V2
V1 =C2 * V2C1
Diluent volume = V2 - V1

Provide inputs to calculate the dilution volumes.

Regulatory references

Read-only guidance aligned with major regulatory bodies.

FDAEMAICHUSPISPEPDA