Convert Standard atmosphere (atm) (atm) to Torr (torr)
Category: Pressure
1 atm = 760 torr
High-precision rounding: 6 decimals
How to convert standard atmosphere (atm) to torr
We convert by pivoting through the SI base unit for Pressure and applying exact factors where applicable.
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Quick conversion table
Handy values for Standard atmosphere (atm) → Torr. Click a value to open that exact result.
Conversion formula
Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).
Common mistakes
- Comparing gauge pressure (psig) with absolute pressure (psia/hPa) without converting reference.
- Mixing bar with atm (1 atm = 1.01325 bar).
Unit facts
- Standard atmosphere (atm): Standard atmosphere is exactly 101,325 Pa; reference pressure in chemistry and physics.
- Torr: Torr is ≈133.322368 Pa; named after Torricelli (barometer). Used in vacuum science.
About Pressure
Pressure is force per unit area. Pascals (and kPa, hPa) are SI, while bar and psi are widely used in engineering and scuba. Conversions must respect absolute vs gauge references when comparing values.
About Standard atmosphere (atm)
Standard atmosphere (atm)
Exactly 101,325 Pa. Reference pressure for chemistry and gas laws; useful for normalizing conditions.
History: A conventional unit set for convenience in calculations and comparative tables.
About Torr
Torr
≈133.322 Pa. Preferred in high-vacuum work alongside millitorr and microns.
History: Named after Torricelli; bridges historical millimeters of mercury (mmHg) with SI pascals.
Related conversions from atm
Related conversions to torr
- bar → torr Bar
- pa → torr Pascal (Pa)
- psi → torr Pounds per square inch (psi)