Solution Reconstitution Calculator
Solution
Solute (mL)
500
Solvent (mL)
500
Total (mL)
1000
Solution reconstitution involves diluting a concentrated stock solution to a desired strength. This is commonly needed for enteral feedings, oral solutions, topical preparations, and irrigating solutions in nursing practice.
The calculator determines how much of the stock (concentrated) solution and how much diluent (usually sterile water or normal saline) to mix to achieve the desired concentration and volume.
Calculate Solution Reconstitution ↑Prepare 1,000 mL of a 25% solution from a 50% stock solution.
Solute = (25 / 50) × 1000 = 500 mL of stock solution
Solvent = 1000 - 500 = 500 mL of diluent
The solute is the substance being dissolved (the concentrated stock solution). The solvent is the liquid used to dilute it (such as sterile water or normal saline). Together they make up the final desired solution.
No. You cannot make a solution stronger than the stock solution by dilution alone. The desired strength percentage must be equal to or less than the stock strength. If a higher concentration is needed, a different stock solution must be used.