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pascal to torr – How to convert Pa to Torr
The pascal (Pa) is the SI base unit for pressure, while the torr is a traditional unit still used in physics, chemistry, and medicine. Converting pascal to torr is vital in vacuum science, respiratory research, and laboratory experiments where pressure must be expressed in consistent terms.
What is a pascal (Pa)?
A pascal equals one newton per square meter. It’s the foundation of all SI pressure measurements and is widely used in engineering, meteorology, and acoustics.
What is a torr?
A torr is defined as 1/760 of an atmosphere, equal to about 133.322 Pa. Named after Evangelista Torricelli, inventor of the barometer, it is often used in vacuum physics and medical science.
How to convert pascal to torr
Torr = Pascal (Pa) ÷ 133.322
Example:
Torr = 2666 Pa ÷ 133.322 ≈ 20 Torr
For quick calculations, try the Conversion Tools. You can also explore other options like the Speed Converter for different unit needs.
Do you know?
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About pascal: Atmospheric pressure at sea level is about 101,325 Pa, which equals 760 Torr.
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About torr: In anesthesia, the partial pressure of oxygen in arterial blood is often measured in Torr — typically around 100 Torr in healthy adults.
From Mercury Tubes to Modern Labs
The torr traces back to Evangelista Torricelli, who invented the mercury barometer in 1643. His device showed that air pressure could be measured by the height of mercury in a tube. This discovery revolutionized science and laid the foundation for meteorology.
Centuries later, scientists still use the torr for vacuum measurements and medical monitoring. By converting pascal to torr, modern researchers connect SI precision with a unit that has carried centuries of scientific tradition.
A Formula That Balances Old and New
Converting Pa to Torr is straightforward: divide by 133.322. Yet this simple calculation bridges two worlds — the SI system used globally and the traditional unit still essential in laboratories and hospitals. From Torricelli’s mercury tube to today’s high-tech equipment, this conversion keeps pressure speaking a universal language.
