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Molar Mass Calculator

Science & Engineering

Molecular weight from chemical formula with element breakdown

Quick Answer

Molar Mass Calculator: Molecular weight from chemical formula with element breakdown. M = Σ (atomic weight × count), IUPAC 2021 values.

Molar mass

180.156 g/mol

24 atoms per formula unit

Molar mass180.156 g/mol
Atom count24

Element breakdown

ElementCountAtomic wtSubtotalMass %
C×612.01172.06640.0%
H×121.00812.0966.7%
O×615.99995.99453.3%

Steps

  1. 1C: 6 × 12.011 = 72.066
  2. 2H: 12 × 1.008 = 12.096
  3. 3O: 6 × 15.999 = 95.994
  4. 4Total = 180.156 g/mol

💡 Supports nested brackets and hydrates (CuSO4·5H2O uses · or .). Common pitfalls: element symbols are case-sensitive (Co = cobalt, CO = carbon monoxide); hydrate water counts fully toward molar mass. Avogadro's number 6.022×10²³ converts moles ↔ particle counts.

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How to Use

  1. Enter known quantities: fill values and confirm units in the Molar Mass Calculator.
  2. Instant solution: unknowns solve live with the formula shown transparently.
  3. Use constant/material tables: standard physical constants and material data are listed on this page.
  4. Compare conditions: change inputs to compare scenarios.

Key Points

  • Molar Mass Calculator is a free online science & engineering tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: Molecular weight from chemical formula with element breakdown.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Molar mass

M = Σ (atomic weight × count), IUPAC 2021 values
Parentheses supported: Ca(OH)₂ = 40.078 + 2×(15.999+1.008) ≈ 74.09 g/mol
H₂SO₄ ≈ 98.07 g/mol · moles n = mass ÷ M

FAQ

How do I use the Molar Mass Calculator?
Open the page and fill in the input fields — results update automatically. Molecular weight from chemical formula with element breakdown.
Are the results accurate?
Yes. Standard formulas and conversion factors are used and verified.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on phones, tablets and desktops.
Is my data saved?
No. Everything runs locally in your browser.

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Source & Updates

Based on CODATA recommended constants and standard physics formulas. Last updated: 2025-07

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. Molar Mass Calculator[EB/OL]. https://www.yijiansuan.com/en/c/science/molar-mass

Results provided by this tool are for reference only and do not constitute professional advice.