Molarity Solution Calculator
Calculate powder mass, dilution volumes, and serial steps with hydrate and purity correction plus bench-ready protocols.
What it does
Choose powder-to-solution, dilution, or a serial dilution table. Enter molecular weight, optional hydrate notation (e.g. ·5H₂O), and label purity so weighed mass matches your reagent bottle. Set target concentration and volume; results update as you type.
You get grams to weigh, stock and diluent volumes, or a step-by-step serial table, plus plain-language bench instructions to copy or print. Save named recipes in the browser for buffers you repeat weekly, and share a link that restores your inputs. One click moves a powder result into the dilution tab as stock. Impossible pipette volumes trigger a warning and open the Serial Dilution Planner when you need pipette-aware rounding.
Why researchers use it
- Correct mass for hydrated salts and supplier purity
- Avoid dilution math and unit conversion errors
- Get bench steps in plain language instantly
- Reuse saved recipes without retyping numbers
- Spot sub-pipette serial transfers before wet work
Best for
- Buffer and media preparation
- Weighing hydrated salts from powder
- Diluting stock to working concentration
- Quick serial dilution estimates
- Training students on solution prep
What makes it different
Sigma-Aldrich, Thermo DailyCalcs, and GraphPad QuickCalcs handle basic molarity math but usually ignore hydrate water and bottle purity, so weighed mass is often too low and solutions end up under-concentrated. They rarely give step-by-step prep instructions you can paste into a notebook.
This browser tool combines powder prep, dilution, and a serial table in one workspace with live results, hydrate parsing, purity adjustment, saved recipes, and shareable links—no install. When volumes fall below practical pipetting, it warns you and hands off to the Serial Dilution Planner for pipette rounding and plate maps.