What units should I use with the dilution calculator?

Any consistent units work. If C1 is in mg/mL and V1 is in mL, then C2 will be in mg/mL and V2 in mL. The calculator is unit-agnostic as long as you stay consistent within each calculation.

Can I use percent solutions with this calculator?

Yes. Enter percent concentrations as numbers (e.g., 50 for 50% dextrose). The output will be in the same percent units. Remember that percent solutions are weight/volume unless otherwise specified.

What if I need to add diluent to reach a target concentration?

Enter your stock concentration (C1), stock volume (V1), and target concentration (C2). The calculator will solve for the final total volume (V2). The diluent volume needed is V2 − V1.

Clinical utility

Dilution calculator

Solve C₁V₁ = C₂V₂ for any missing variable. Unit-agnostic.

Formula reference

C₁V₁ = C₂V₂

Enter any 3 values to solve for the 4th. Concentrations and volumes must use consistent units.

V₂ − V₁ = diluent volume to add.

Works with mg/mL, % solutions, mEq/mL, or any consistent concentration unit.

Safety checks

This tool supports calculation and education only.
It does not diagnose, prescribe, or replace current clinical references.
Verify all calculations before preparation and administration.
Use consistent units throughout each calculation.
Label all prepared solutions clearly with concentration, date, and preparer.

Basis and limits

Formula: C₁V₁ = C₂V₂ (conservation of mass in dilution).
Units: any consistent concentration and volume units. Do not mix mg/mL with % without conversion.
Diluent volume: V₂ − V₁ gives the volume of diluent to add to the stock solution.
Scope: simple dilution math. Does not account for volume contraction, chemical incompatibility, or osmolarity changes.

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