protein molecular weight calculator
Calculate Moles
About Moles
A mole is a unit of measurement used in chemistry to express amounts of a chemical substance. One mole contains exactly 6.022 × 10²³ particles (Avogadro's number).
From Mass:
n = mass / molecular weight
From Volume (Ideal Gas):
n = PV / RT
From Particles:
n = number of particles / 6.022 × 10²³
Key Constants:
• Avogadro's number: 6.022 × 10²³ mol⁻¹
• Gas constant (R): 0.0821 L·atm/(mol·K)
• Standard temperature: 273.15 K (0°C)
• Standard pressure: 1 atm