Avogadro Calculator
Calculate molar mass and number of particles from mass, moles, and Avogadro’s constant.
Inputs
mol⁻¹
Exact SI value: 6.02214076 × 10²³ mol⁻¹.
Unit changes preserve the original entered mass to avoid conversion drift.
× 10^
mol
n = a × 10^b mol. Exponent b should be an integer.
Results
Molecular weight (molar mass)
g/mol
Computed from M = m / n.
Number of particles
× 10^
Computed from N = n × NA.
Step-by-step derivation
Enter values, then press Calculate to see the algebra with your numbers inserted.
References
- SI definition of the mole: NA = 6.02214076 × 10²³ mol⁻¹.
- Core relations: N = n × NA, n = m / M, so M = m / n.
- Mass factors used: 1 µg = 1e-6 g, 1 mg = 1e-3 g, 1 dag = 10 g, 1 kg = 1000 g, 1 oz = 28.349523125 g, 1 lb = 453.59237 g.