OYSI

Dosage Calculator

Calculate the required dose volume from a stock solution. V_dose = (C_target × V_total) / C_stock. Enter three values.

Formula

V_dosis = (C_ziel × V_gesamt) / C_stock

Leave the field to calculate empty

g/L
g/L
mL
mL

The dosage calculator computes the required volume of a stock solution to achieve a target concentration in a given total volume. The underlying formula is V_dose = (C_target × V_total) / C_stock.

In laboratory practice, this calculator is used when a diluted working solution needs to be prepared from a concentrated stock solution (e.g., a disinfectant solution or reagent). It is particularly useful in daily laboratory work in analytics, microbiology, and quality control.

The calculator can also work in reverse: if the dose volume is known, the resulting target concentration, required total volume, or necessary stock concentration can be calculated.

Frequently Asked Questions

How do I calculate the dose volume from a stock solution?
The dose volume is calculated using the formula V_dose = (C_target × V_total) / C_stock. Enter the stock concentration, desired target concentration, and total volume, and the calculator automatically determines the required stock solution volume.
What is the difference from the dilution calculator?
The dosage calculator uses the same mathematical basis (C₁V₁ = C₂V₂) but is specifically designed for dosing from stock solutions. The variables are named stock concentration, target concentration, total volume, and dose volume, making practical application more intuitive.
What units should I enter values in?
Concentrations are entered in g/L and volumes in mL. Make sure both concentrations are in the same unit. If needed, you can use our unit converter.

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