Volume gás CNTP
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The STP gas volume calculator helps determine the volume occupied by a specific amount of gas under standard temperature and pressure conditions. At STP, one mole of any ideal gas occupies 22.4 liters, following the formula V = n·22.4 L, where 'n' is the number of moles. This tool is essential for stoichiometric calculations in chemistry, such as gas reactions.
To use the calculator, simply input the number of moles of the gas. The formula applies directly by multiplying the value by 22.4 L. It is crucial to ensure conditions are truly STP (0°C and 1 atm), as temperature or pressure variations affect the actual volume. Accuracy relies on the assumption of ideal gas behavior, valid for ideal gases or conditions close to this idealization.
This calculator is used in chemistry labs, chemical industries, and academic settings. For instance, calculating CO₂ volume in fermentation or O₂ required for combustion. It is also common in exams and exercises involving gas laws.
Frequently asked questions
What are standard temperature and pressure (STP) conditions?
STP corresponds to 0°C (273 K) and 1 atmosphere of pressure. Under these conditions, ideal gases occupy 22.4 L per mole.
How does the calculator use the formula V = n·22.4 L?
The formula multiplies the number of moles (n) by the standard molar volume (22.4 L/mol) to calculate the total volume.
When should I use this calculator for chemistry problems?
Use it when the problem specifies STP or involves gases under standardized conditions.
What if the gas is not at STP?
The actual volume will differ. In such cases, use the ideal gas law (PV = nRT) for more accurate results.