🌬️ mmHg → atm Conversion
Translate vacuum gauge readings from millimeters of mercury into atmospheres.
Laboratory, HVAC, and meteorological measurements often reference mmHg. This converter lets you express those readings in atmospheres and other widely used units.
Atmospheres: 1 atm
Pascals: 101,325.01 Pa
Pounds per square inch: 14.69595 psi
How to Use This Calculator
Enter mmHg reading
Input the pressure measured in millimeters of mercury.
View atmospheres
The calculator divides by 760 to display standard atmospheres.
Check other units
Pascals and psi values provide additional engineering context.
Formula
Atmospheres = mmHg ÷ 760
Pascals ≈ mmHg × 133.322
psi ≈ mmHg × 0.0193368
Use the formula breakdown to confirm the calculation logic or perform the conversion manually if needed.
Full Description
Millimeters of mercury remain common in barometric pressure, vacuum systems, and blood pressure measurements. Converting to atmospheres helps compare readings with international standards and technical documentation.
The calculator also reports the equivalent in Pascals (SI base unit) and pounds per square inch for convenience when working across mixed systems.
Frequently Asked Questions
Why divide by 760?
760 mmHg equals 1 atmosphere at standard conditions. Dividing by 760 converts any reading into atmospheres.
Is 760 mmHg always 1 atm?
Yes, by definition. Small environmental variations are typically negligible.
Can I convert atm back to mmHg?
Multiply atmospheres by 760 to recover mmHg.
Does temperature matter?
The conversion assumes standard temperature. For high-precision work, also consider temperature adjustments.