Atomic Mass of Nitrogen
| Value | 14.007 g/mol (0.014007 kg/mol) |
| Status | Measured: ± 0.001 g/mol (7.1 × 10⁻⁵ relative), standard uncertainty |
| Source | IUPAC |
| Categories | Chemistry |
| Unit | Value |
|---|---|
| gram per mole | 14.007 g/mol |
| kilogram per mole | 0.014007 kg/mol |
| kilogram per kilomole | 14.007 kg/kmol |
| milligram per millimole | 14.007 mg/mmol |
| pound per pound-mole | 14.007 lb/lb-mol |
| dalton (as molar mass) | 14.007 Da |
| kilodalton (as molar mass) | 0.014007 kDa |
Learning zone
Nitrogen's 14.007 g/mol is nearly all ¹⁴N, with just 0.36 % ¹⁵N, so the standard atomic weight sits very close to a whole number. It is the number that converts between a compound and its nitrogen content: urea, CH₄N₂O at 60.06 g/mol, carries 2 × 14.007 = 28.014 g of nitrogen per mole, which is 46.6 % N, the figure printed as the first number of a fertiliser's N-P-K grade.
The same division runs through environmental reporting, where ammonia, nitrate and nitrite are all normalised "as N" so that they can be added into a single total nitrogen figure. Nitrate at 62.00 g/mol is 22.6 % nitrogen, so the drinking-water limit of 10 mg/L as N is 44.3 mg/L as NO₃⁻: the same water, two numbers, and a standard source of confusion between American and European reporting conventions.
Moles from Mass (n = m/M)
Cite this page
formula.expert. (2026, October 16). Atomic Mass of Nitrogen. https://formula.expert/constants/atomic-mass-nitrogen