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mmHg to Atmospheres Converter

Free instant mmHg → atm converter. No signup, no uploads — everything is calculated privately in your browser.

Value

From

1 mmHg = 0.00131579 atmospheres

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Quick Answer

1 millimeter of mercury equals 0.00131579 atmospheres. To convert mmhg to atmospheres, multiply the value by this factor.

Key Facts

Reverse: 1 atmosphere = 760 mmhg.

mmHg to Atmospheres Formula

Formula: value ÷ 760

Prefer to skip the math? Type any value in the converter above and it converts instantly.

mmHg to Atmospheres Conversion Table

mmHg (mmHg)	Atmospheres (atm)
1 mmHg	0.00131579 atm
2 mmHg	0.00263158 atm
5 mmHg	0.00657895 atm
10 mmHg	0.0131579 atm
25 mmHg	0.0328947 atm
50 mmHg	0.0657895 atm
100 mmHg	0.131579 atm
250 mmHg	0.328947 atm
500 mmHg	0.657895 atm
1,000 mmHg	1.31579 atm

Frequently Asked Questions

How do I convert mmhg to atmospheres?

Enter the value above and the result appears instantly — the calculation runs entirely in your browser. Formula: value ÷ 760.

What is the exact mmhg to atmospheres conversion factor?

1 millimeter of mercury = 0.00131579 atmospheres (shown to 6 significant figures — the converter itself computes at full precision). The reverse factor is 1 atmosphere = 760 mmhg.

What are some common mmhg to atmospheres conversions?

1 mmHg = 0.00131579 atm; 10 mmHg = 0.0131579 atm; 100 mmHg = 0.131579 atm. Use the full conversion table below for more reference values.

Is PSI the same as psia?

No. PSI usually means gauge pressure (psig) — the difference between the measured pressure and the surrounding atmosphere, which is why a tire reads 0 psi when flat. Absolute pressure (psia) includes atmospheric pressure (~14.7 psi at sea level). This converter converts between pressure magnitudes; it does not add or remove the atmospheric baseline.

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