Root Mean Square Velocity Calculator
Compute molecular RMS speed from kinetic theory.
How to Use This Calculator
Enter the absolute temperature and the molar mass of the gas. The result is RMS speed in meters per second.
Formula
vrms = √(3 R T / M)
R = 8.314 J/mol·K, M in kg/mol, T in K.
About RMS Velocity
RMS speed is a measure of the average molecular speed related to temperature in an ideal gas.
Frequently Asked Questions
Can I use atomic mass units?
Convert to g/mol first; the calculator converts g/mol to kg/mol internally.
How does temperature affect vrms?
It scales with √T, so doubling T increases vrms by √2.