Convert mmHg (mmHg) to Atmospheres (atm)
mmHg and Atmospheres are both Pressure units, linked by the constant ratio 0.001316. Type a number to see the conversion immediately.
Formula
1 mmHg = 0.001316 atm
To convert mmHg to atm, divide the value by 760.0021.
Conversion Table
| mmHg (mmHg) | Atmospheres (atm) |
|---|---|
| 0.01 mmHg | 0 atm |
| 0.1 mmHg | 0.0001 atm |
| 0.5 mmHg | 0.0007 atm |
| 1 mmHg | 0.0013 atm |
| 2 mmHg | 0.0026 atm |
| 3 mmHg | 0.0039 atm |
| 5 mmHg | 0.0066 atm |
| 10 mmHg | 0.0132 atm |
| 15 mmHg | 0.0197 atm |
| 20 mmHg | 0.0263 atm |
| 25 mmHg | 0.0329 atm |
| 50 mmHg | 0.0658 atm |
| 100 mmHg | 0.1316 atm |
| 250 mmHg | 0.3289 atm |
| 500 mmHg | 0.6579 atm |
| 1000 mmHg | 1.3158 atm |
| 2500 mmHg | 3.2895 atm |
| 5000 mmHg | 6.5789 atm |
| 10000 mmHg | 13.1579 atm |
| 50000 mmHg | 65.7893 atm |
Common mmHg to atm Examples
- 1 mmHg = 0.0013 atm
- 5 mmHg = 0.0066 atm
- 10 mmHg = 0.0132 atm
- 25 mmHg = 0.0329 atm
- 50 mmHg = 0.0658 atm
- 100 mmHg = 0.1316 atm
- 500 mmHg = 0.6579 atm
- 1000 mmHg = 1.3158 atm
Frequently Asked Questions
Round 0.001316 to one or two significant digits and multiply mentally. Use the exact factor when accuracy matters.
It comes from the official definitions of both Pressure units, which are anchored to internationally agreed reference standards.
For rough estimates, round 0.001316 to a simpler number. For precise results, use the full ratio with a calculator.
Multiply 100 by 0.001316 to get the equivalent in atm, then compare with 50. The ratio determines which value is larger.
The calculator uses the standard ratio 0.001316 and returns results to several decimal places, suitable for both casual and technical use.
No. The conversion factor between mmHg and atm is a fixed mathematical ratio and does not depend on environmental conditions.