Enter a formula to estimate molar mass instantly. Check moles, grams, and particle counts together. Download results, study formulas, and verify examples without clutter.
| Compound | Formula | Molar Mass (g/mol) | Typical Use |
|---|---|---|---|
| Potassium | K | 39.0983 | Reference element value |
| Potassium chloride | KCl | 74.5483 | Salts and solution work |
| Potassium hydroxide | KOH | 56.1053 | Base calculations |
| Potassium nitrate | KNO3 | 101.1033 | Fertilizer and stoichiometry review |
| Potassium sulfate | K2SO4 | 174.2526 | Practice sample for grouped formulas |
Molar mass: M = Σ(ni × Ai)
Moles from mass: n = m / M
Mass from moles: m = n × M
Particles from moles: N = n × NA
Mass per particle: mparticle = M / NA
Purity correction: mpure = msample × purity / 100
Here, ni is the atom count, Ai is atomic mass, and NA is Avogadro's constant.
This K molar mass calculator helps students, teachers, and analysts compute molar mass from a chemical formula. It also converts between grams, moles, and particles. You can enter K for potassium or a larger compound such as KCl, KNO3, or K2SO4. The calculator reads subscripts, grouped terms, and hydrate notation. That makes it useful for classroom tasks, lab checks, and quick homework review.
Molar mass links the microscopic and macroscopic views of matter. Atomic mass values describe single atoms. Molar mass describes one mole of particles. This bridge lets you move from particle counts to grams. It also lets you estimate sample size, compare compounds, and verify reaction data. In physics and physical chemistry, these conversions support gas laws, kinetic theory, density work, and thermal calculations involving amount of substance.
The tool breaks each formula into elements and counts. It then multiplies each count by the atomic mass of that element. The contributions are added to produce total molar mass in grams per mole. The breakdown table also shows composition by mass. This is helpful when you need to see why a formula has a certain value. The result section can also estimate pure mass, moles, molecules, and average mass per particle from your given input.
Use this calculator before preparing solutions, checking stoichiometry, or reviewing gas equation problems. It is also useful when estimating the amount of potassium in fertilizers, salts, and mineral samples. The example table below gives quick reference values for familiar K containing compounds. Export options help you save summary results for reports or assignments. Because the layout is simple, it stays readable on desktop, tablet, and mobile screens. That keeps the focus on formulas, units, and interpretation instead of visual clutter.
Clear labels reduce input mistakes. Validation messages flag unknown symbols or mismatched parentheses. Adjustable decimal precision supports quick estimates and detailed reporting. This makes the page useful for first year learners and advanced users who still want a fast, transparent, formula based workflow with exportable results and plain tables for study.
It returns molar mass, elemental breakdown, mass percentage, total atoms per formula unit, and optional conversions between grams, moles, and particles.
Yes. Entering K calculates the molar mass of potassium. The same parser also handles compounds such as KCl, KOH, KNO3, and K2SO4.
Yes. Formulas with grouped terms, such as Ca(OH)2 or Al2(SO4)3, are supported. The parser multiplies grouped counts correctly.
Yes. Hydrate notation such as CuSO4·5H2O is supported. A dot or middle dot can separate the hydrate portion.
Purity adjusts the entered sample mass before mole conversion. A 90 percent pure sample contributes only 90 percent of its stated mass as the target substance.
A warning appears when entered mass, mole, and particle values do not match within the selected formula. Check units, purity, and the chemical formula.
No. The title follows your requested topic, but the parser can evaluate many standard chemical formulas supported by the atomic mass table.
CSV is useful for spreadsheets and lab logs. PDF helps you save a clean summary for assignments, revision notes, and reporting.
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.