How Many Atmospheres in a Millimeter of Mercury?

Quick Answer
1 Millimeter of Mercury = 0.001 Atmospheres

1 mmHg = 0.001 atm

Formula

atm = mmHg × 0.001

Conversion Table

Millimeters of Mercury (mmHg)Atmospheres (atm)
1 mmHg0.001 atm
2 mmHg0.003 atm
5 mmHg0.007 atm
10 mmHg0.013 atm
20 mmHg0.026 atm
50 mmHg0.066 atm
100 mmHg0.132 atm
500 mmHg0.658 atm
1,000 mmHg1.316 atm

Worked Examples

Convert 5 mmHg to atm:
5 mmHg × 0.001 = 0.007 atm
Convert 10 mmHg to atm:
10 mmHg × 0.001 = 0.013 atm
Convert 50 mmHg to atm:
50 mmHg × 0.001 = 0.066 atm

FAQ

How many Atmospheres are in 1 Millimeter of Mercury?
There are 0.001 Atmospheres in 1 Millimeter of Mercury. Formula: atm = mmHg × 0.001.
How to convert Millimeters of Mercury to Atmospheres?
To convert Millimeters of Mercury to Atmospheres, multiply the number of Millimeters of Mercury by 0.001. For example, 10 mmHg = 0.013 atm.
How many Atmospheres are in 100 Millimeters of Mercury?
There are 0.132 Atmospheres in 100 Millimeters of Mercury. Calculation: 100 × 0.001 = 0.132.