In 1 atmospheres there are 760 torrs. Meanwhile in 1 torrs there are 0.001316 atmospheres. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Torrs to Atmospheres calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert atmospheres (atm) to torr (Torr), use the fixed pressure relationship:
1 atm equals 760 torr. This value comes from standard atmospheric pressure at sea level.
Multiply the pressure in atmospheres by 760.
Formula: torr = atm × 760
0.5 atm equals 380 torr.
Calculation: 0.5 × 760 = 380
2 atm equals 1,520 torr.
Calculation: 2 × 760 = 1,520
1.2 atm equals 912 torr.
Calculation: 1.2 × 760 = 912
Because 1 atm is defined as standard pressure, which matches the pressure needed to support a 760 mm column of mercury under standard conditions. A torr is based on that mercury column scale.
They are almost the same in everyday use.
No. The conversion is fixed because it links two units, not a real-world weather condition. Temperature and altitude change actual air pressure, but 1 atm still equals 760 torr as a unit conversion.
The conversion factor is 760 torr per 1 atm.
You can write it as: 1 atm = 760 torr.
Divide torr by 760.
Formula: atm = torr ÷ 760
A torr is a unit of pressure equal to 1/760 of an atmosphere. It’s widely used for low-pressure and vacuum measurements.
An atmosphere (atm) is a unit of pressure based on standard sea-level air pressure. It’s used often in science to compare gas pressures using a common reference.
Yes. Use more decimal places when you need tighter rounding in a lab report. For most work, 760 torr per atm is enough and keeps math simple.
The Calculate Box tool to convert atmospheres to torrs uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a atmospheres value in the box and have it instantly converted to torrs.