Convert Atmospheres to Torrs

To convert atmospheres (atm) to torr (Torr), use the fixed pressure relationship:

• 1 atm = 760 Torr

Quick conversion formula

• Torr = atm × 760

Steps

1. Take your pressure in atm.
2. Multiply it by 760.
3. The result is the pressure in Torr.

Example

• 0.5 atm × 760 = 380 Torr

Useful reference

• 1 atm = 760 Torr (standard atmospheric pressure)

How many torr are in 1 atmosphere (atm)?

1 atm equals 760 torr. This value comes from standard atmospheric pressure at sea level.

How do you convert atmospheres to torr?

Multiply the pressure in atmospheres by 760.
Formula: torr = atm × 760

What is 0.5 atm in torr?

0.5 atm equals 380 torr.
Calculation: 0.5 × 760 = 380

What is 2 atm in torr?

2 atm equals 1,520 torr.
Calculation: 2 × 760 = 1,520

What is 1.2 atm in torr?

1.2 atm equals 912 torr.
Calculation: 1.2 × 760 = 912

Why is 1 atm equal to 760 torr?

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.

Is torr the same as mmHg?

They are almost the same in everyday use.

• 1 torr is defined as 1/760 of 1 atm.
• 1 mmHg comes from the pressure of a 1 mm mercury column.
  In many lab settings, people treat torr and mmHg as equal, but they are not perfectly identical by strict definition.

Does the atm to torr conversion change with temperature or altitude?

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.

What is the conversion factor from atm to torr?

The conversion factor is 760 torr per 1 atm.
You can write it as: 1 atm = 760 torr.

How do you convert torr back to atmospheres?

Divide torr by 760.
Formula: atm = torr ÷ 760

When would you use atm vs torr?

• atm often appears in chemistry problems, gas laws, and general pressure values.
• torr is common in vacuum work, lab pressure readings, and equipment specs.

What is a torr?

A torr is a unit of pressure equal to 1/760 of an atmosphere. It’s widely used for low-pressure and vacuum measurements.

What is an atmosphere (atm)?

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.

Can I round 760 torr to 760.0 or 760.00 for conversions?

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.