Estimate molecule proportions using mass, count, concentration, or volume inputs. See balanced sample ratios instantly. Track excess, fractions, and normalized values with clear charts.
These formulas convert each sample into effective moles first. Once both species share the same unit, the tool computes their ratio, normalized proportions, target alignment, limiting sample, and excess amount.
Example assumes concentration and volume mode with a target ratio of 1:3.
| Sample | Concentration (mol/L) | Volume (mL) | Purity (%) | Effective moles | Mole fraction |
|---|---|---|---|---|---|
| Protein A | 0.002 | 0.50 | 100 | 1.0000e-6 | 0.25 |
| Ligand B | 0.006 | 0.50 | 100 | 3.0000e-6 | 0.75 |
This example produces an actual molecular ratio of 1:3, matching the target ratio exactly.
It compares two molecular species after converting the entered data into effective moles. That shared basis lets you evaluate ratios, fractions, limiting behavior, and excess material consistently.
Use mass mode when you know sample mass and molar mass. The tool converts grams into moles, then builds the molecular ratio from those converted values.
Purity corrects for inactive or non-target material inside a sample. Lower purity reduces effective moles, which can change the ratio and sometimes switch the limiting sample.
The normalized ratio divides both mole values by the smaller one. This shows proportions on a simple comparable scale, such as 1:2.5 or 3.2:1.
It converts the measured ratio into a nearby small-integer form. That helps you interpret practical relationships, such as 2:1, 3:2, or 5:4, from decimal results.
The calculator compares each sample against the target ratio you entered. The species that runs out first relative to its required target share becomes the limiting sample.
Yes. The method is general as long as your values can be represented as moles or converted into moles from mass, concentration, or molecule counts.
It is helpful for planning, checks, and interpretation. For regulated workflows, confirm units, sample identity, and assumptions against validated laboratory methods before acting.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.