Formula
rate₁/rate₂=√(M₂/M₁).
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Ideal gases at the same temperature, effusing through a small aperture. Bulk mixing and turbulent flow are not modeled.
Example Calculation
Example inputs
- Molar mass of gas 1: 4 g/mol
- Molar mass of gas 2: 16 g/mol
Gas masses 4 and 16 g/mol yield an effusion-rate ratio of 2.
Frequently asked questions
How do I use this calculator?
Enter molar mass of gas 1, molar mass of gas 2. The result updates automatically. Use Reset to restore the example values.
What method does it use?
rate₁/rate₂=√(M₂/M₁).. Ideal gases at the same temperature, effusing through a small aperture. Bulk mixing and turbulent flow are not modeled.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.