Àwọn

Molar mass of a chemical formula, with a per-element mass breakdown.

Àwọn Ìjánu-ìsún —

Àwọn àtòjọ-ẹ̀yàn —

Àwọn ìṣàmúlò-ètò —

Àwọn Àtòjọ-ẹ̀yàn àwọn ìṣàmúlò-ètò

Ńlà àwọn àwọn ààtò àtòjọ-ẹ̀yàn yìí?

Àkóónú ìṣàmúlò-ètò yìí

The molecular weight, or molar mass, of a compound is the mass of one mole of it in grams per mole, found by adding up the standard atomic weight of every atom in its chemical formula. This molecular weight calculator parses a formula you type — element symbols with optional subscripts, nested parentheses, and a leading multiplier for hydrates — and sums the atomic weights, drawing on IUPAC standard values (hydrogen 1.008, carbon 12.011, oxygen 15.999, and so on).

As a worked example, water H2O contains two hydrogen atoms and one oxygen: 2 × 1.008 + 15.999 = 18.015 g/mol. Glucose C6H12O6 sums to 6 × 12.011 + 12 × 1.008 + 6 × 15.999 = 180.156 g/mol. The calculator also returns a per-element breakdown showing each element’s atom count, atomic weight, mass subtotal and percentage of the total mass — so for water it reports oxygen as about 88.8% of the mass and hydrogen the rest.

The parser understands parentheses and hydrate dot-notation, so Ca(OH)2 is read as one calcium, two oxygen and two hydrogen (74.09 g/mol) and CuSO4.5H2O includes the five waters of crystallisation (249.68 g/mol). Molar mass is the essential bridge between the mass you weigh on a balance and the moles a reaction needs, so it underlies solution preparation, reaction stoichiometry, yield calculations and converting between grams and moles at every step of quantitative chemistry.

Àwọn Àtòjọ-ẹ̀yàn

Bawo ní a ṣe lè ṣé ìṣàmúlò-ètò?

Multiply each element’s atomic weight by how many atoms of it the formula contains, then add them up. Water (H₂O) is 2 × 1.008 + 15.999 = 18.015 g/mol.

Àwọn àwọn ìṣàmúlò-ètò ìṣàmúlò-ètò wò ní ìdájú?

Element symbols with optional counts, nested parentheses and a leading multiplier for hydrates. Ca(OH)2 is read as one calcium, two oxygen and two hydrogen; CuSO4.5H2O includes five waters.

Kini iyatọ laarin iwuwo molẹti ati iwuwo molara?

Numerically they are the same value. Molecular weight (or molecular mass) is a relative figure in daltons for one molecule; molar mass is the mass of a mole in grams per mole. Both equal the summed atomic weights.

Bawo ni mo ṣe lè fi àwọn ààyè

Use a dot before the water group: CuSO4.5H2O. The leading 5 multiplies the H2O, adding five waters of crystallisation, and the calculator returns 249.68 g/mol for that hydrate.

Kini àwọn ìpéwọ̀n àwọn ìpéwọ̀n tí o fi ṣàfihàn?

Fun ohun elo kan, o nfun ọ̀pọ̀lù ohun elo náà nínú gbogbó àwọn àwọn àtíjá. Nínú omi, ósìrà jẹ́ 88.8% àti hydrogènì 11.2%; nínú glucose, carbonì jẹ́ 40.0%, hydrogènì 6.7% àti ósìrà 53.3% - tí ò lè lò fún àwọn fómùlì àti àwọn iṣẹ́ ìdára.

Kini idi ti àwọn ìṣàmúlò-ètò mìíràn mìi

Àwọn àmì-ìwé àwọn àmì-ìwé ní pàtó nípa ìṣàmúlò-ètò àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwé àwọn àmì-ìwe

Ń lè ṣé ìṣàmúlò-ètò ìṣàmúlò-ètò àti àwọn

Yes — wrap the group in parentheses with its multiplier, like Ca(OH)2 or (NH4)3PO4. The parser expands the parentheses and multiplies the enclosed atoms, so ammonium phosphate sums correctly across all three ammonium groups.

API — ló àwọn ìṣàmúlò-ètò yìí láti inú ìṣàmúlò-ètò

Fi àwọn ìṣàmúlò-ètò yìí kọ̀ǹpútà yìí láti jẹ́ ààyè-iṣẹ́ JSON tí a tí fi pamọ́ - kò ní bọ́tìnì kan tí a fẹ́. Fi àwọn fálù ààyè-iṣẹ́ sílẹ̀ sí bí àwọn àwọn ìṣàmúlò-ètò àti JSON. Anything you omit uses the same default this page is pre-filled with; an unknown parameter is a 400, never a silent zero. Ka àwọn àkọlé API kíkún →

Àwọn Ààyè Ìjánu-ìṣàmúlò-ètò

GET https://calculator.free/api/v1/molecular-weight/

curl

curl "https://calculator.free/api/v1/molecular-weight/?formula=H2O"

JavaScript `fetch()`

const r = await fetch(
  "https://calculator.free/api/v1/molecular-weight/?" + new URLSearchParams({
    "formula": "H2O"
  }));
const data = await r.json();
console.log(data.results);

Results are estimates for general guidance only, not financial, medical or tax advice.

Àkóónú ìṣàmúlò-ètò yìí

Àwọn Àtòjọ-ẹ̀yàn

Àwọn Ìṣàmúlò-ètò Ìṣàmúlò-ètò

Àwọn Ààyè Ìjánu-ìṣàmúlò-ètò

curl

JavaScript fetch()

JavaScript `fetch()`