Tools / CHECK
Dilution arithmetic
Check a simple laboratory-reagent dilution with explicit units and a final-volume constraint.
Illustrative example
The result
Method & assumptions
Concentrations must use the same units. This assumes additive volumes and compatible materials. It does not account for density, purity, reaction chemistry, or preparation losses. Not for medication dosing or human use.
Sanity check
A 10-unit stock diluted to 2 units in 5 mL requires 1 mL stock plus 4 mL diluent.
Cstock × Vstock = Ctarget × Vfinal Vstock = Ctarget × Vfinal / Cstock Vdiluent = Vfinal − Vstock
Implementation version 1.0 · 2026-10-15. Deterministic formulas or editorial rules, with no AI model or external service processing your inputs.