Start with final volume, concentration, and concentration unit. Add molar mass, purity, and density only when needed.
Fast input from just a few fields
Stable scaling without breaking the recipe
Copy, CSV, and print-ready output
Volumetric flask suggestions for practical use
Scalable Solution Recipe Calculator
Generate a table of required reagent amounts in g and mL from the target concentration and final volume.
Scale the same recipe by x2 or x10, apply purity correction, add multiple components, and reuse the output with print, CSV, TSV copy, and share URLs.
The result keeps units, purity correction, and base-versus-scaled values visible, so it can go straight into the lab notebook.
Compare x1, x2, x5, x10, and other factors in one place without rebuilding the formula each time.
The page suggests common flask volumes, keeps a notes field for labels, and answers recurring questions directly below.
Safety Notes
- This tool supports amount calculations only and does not explain hazardous operating procedures.
- Handling, weighing, and storage must follow the SDS and your institution's safety rules.
- After preparation, label the contents with component names, concentration, solvent, date, preparer, and hazard information.
How to use
- Enter the final volume and the scale factor.
- Add one or more solute rows and choose the concentration unit for each row.
- If the row uses M or mM, enter a chemical formula or the molar mass directly.
- Review the required amounts table and compare the base recipe with the scaled recipe.
- Print, copy, export CSV, or share the URL when you want to reuse the recipe.
Examples
100 mL of 1 M NaCl
Input
Final volume 100 mL, component NaCl, concentration 1 M, purity 100%
Output
Required mass 5.844 g, and 58.44 g at x10 scale
CaCl2 at 98% purity
Input
500 mL, CaCl2, 10 mM, purity 98%
Output
The page shows the required mass after purity correction
Multi-component recipe
Input
NaCl 150 mM, Tris 20 mM, final volume 250 mL
Output
Each component appears as its own row in the required amounts table
Round 37 mL to a standard flask size
Input
Final volume 37 mL
Output
The page suggests 25 mL and 50 mL and recalculates the required amounts
What this page covers
Inputs: solute, concentration, volume, purity
Enter the final volume, target concentration, and concentration unit. For molarity-based rows, the page calculates the required mass from the molar mass and applies purity correction when needed.
Outputs: required amounts, scale table, print and CSV
The main table shows the scaled result and the base recipe together. The scale table compares multiple factors side by side and is designed for print, TSV copy, and CSV export.
Volumetric flask suggestions
If the scaled final volume is awkward, the page proposes common flask sizes and recalculates the amounts for those target volumes.
Notes and record keeping
The notes box is included in print and CSV output, so you can keep label information, storage notes, and preparation records together with the recipe.
Glossary
Scale factor
A multiplier applied to the whole recipe. At x2, both the final volume and every required amount become twice as large.
Purity correction
A correction based on the fraction of active component in the reagent. A lower purity increases the required mass.
Molar mass
The value in g/mol used to convert M or mM into required mass.
Standard flask candidate
A common flask size such as 25 mL, 50 mL, or 100 mL that the page can suggest when your target volume is irregular.
Formulas
- n = C × V
- m_theory = n × MW
- m_required = m_theory / purity_fraction
- m = C_g/L × V(L)
- m(mg) = C_mg/mL × V(mL)
- volume_mL = mass_g / density_g_per_mL
Frequently Asked Questions
Can I correct for reagents that are not 100% pure?
Yes. Enter the purity percentage and the page treats it as the active fraction used for mass correction. The required mass and optional liquid volume both reflect that correction.
Can I calculate mixed solutions with multiple solutes?
Yes. Add one row per component. The tool calculates each row independently and keeps the recipe together in one output table.
Can the page suggest a rounded flask volume?
Yes. The tool suggests nearby standard volumes such as 25 mL or 50 mL and recalculates the required amounts for those candidates.
What if I do not know the chemical formula?
You can enter the molar mass directly in g/mol instead of a formula.
Can I also get the required volume for a liquid reagent?
Yes. Turn on the setting to show liquid volume and enter the density. The page then shows the required mL alongside the required mass.
Does this page explain how to prepare the solution step by step?
No. The page only calculates required amounts. It does not describe hazardous procedures or handling steps.
Notes
- This page supports quantity calculations only. It does not give hazardous preparation procedures.
- Always follow the SDS, internal lab rules, and equipment-specific procedures for weighing and handling.
- Actual required amounts can differ with purity definitions, hydrates, specifications, or measured density values.
- For critical work, verify with the reagent specification sheet, measured values, and your institutional SOP.