Torr
The torr is a pressure unit equal to 1/760 of a standard atmosphere, matching 1 mmHg at 0°C within rounding.
Torr measures vacuum levels in chemistry, semiconductor fabrication, and high-vacuum physics experiments.
Torr to Standard Atmosphere
Convert torr to standard atmosphere instantly. Type in either field — results update live.
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Pressure Torr Standard Atmosphere
1 torr = 0.0013157895 standard atmospheres
Unit
Unit
Conversion table
Selected Torr values converted to atm using the exact factor from this tool.
| Torr | atm |
|---|---|
| 0.01 | 0.0000131579 |
| 0.1 | 0.0001315789 |
| 1 | 0.0013157895 |
| 2 | 0.0026315789 |
| 3 | 0.0039473684 |
| 5 | 0.0065789474 |
| 10 | 0.0131578947 |
| 20 | 0.0263157895 |
| 50 | 0.0657894737 |
| 100 | 0.1315789474 |
| 1,000 | 1.3157894737 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 torr = 0.0013157895 atm
1 atm = 759.9999999997 torr
To convert torr to standard atmosphere, multiply by 0.0013157895.
To convert standard atmosphere to torr, multiply by 759.9999999997.
Example: convert 10 torr to atm
10 × 0.0013157895 = 0.0131578947 atm
About these units
Short background on the units used in this conversion.
Standard Atmosphere (atm)
The standard atmosphere (atm) is defined as exactly 101,325 pascals — average sea-level atmospheric pressure.
Atmospheres compare scuba tank fills, describe laboratory reference pressure, and normalize gas volumes.
Frequently asked questions
How many standard atmospheres are in one torr?
One torr equals 0.0013157895 standard atmospheres. Multiply your torr value by 0.0013157895 to convert to standard atmospheres.
What is the conversion formula?
atm = torr × 0.0013157895The reverse is
torr = atm × 759.9999999997, using the same exact factors as this converter.Is this Torr to Standard Atmosphere converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.
All torr conversions
Jump to any pressure conversion starting from torr — including the reverse direction and every other unit in our dataset.
standard atmosphere (atm) → torr
torr → pascal (Pa)torr → kilopascal (kPa)torr → megapascal (MPa)torr → bartorr → pound per square inch (psi) (psi)torr → hectopascal (hPa)torr → millibar (mbar)torr → millimeter mercury (0°c) (mmHg)torr → newton per square meter (N/m²)torr → kip per square inch (ksi) (ksi)torr → exapascal (EPa)torr → petapascal (PPa)torr → terapascal (TPa)torr → gigapascal (GPa)torr → dekapascal (daPa)torr → decipascal (dPa)torr → centipascal (cPa)torr → millipascal (mPa)torr → micropascal (µPa)torr → nanopascal (nPa)torr → picopascal (pPa)torr → femtopascal (fPa)torr → attopascal (aPa)torr → newton per square centimeter (N/cm²)torr → newton per square millimeter (N/mm²)torr → kilonewton per square meter (kN/m²)torr → microbar (µbar)torr → dyne per square centimeter (dyn/cm²)torr → kilogram-force per square meter (kgf/m²)torr → kilogram-force per square centimeter (kgf/cm²)torr → kilogram-force per square millimeter (kgf/mm²)torr → gram-force per square centimeter (gf/cm²)torr → ton-force (short) per square foot (tonf/ft²)torr → ton-force (short) per square inch (tonf/in²)torr → ton-force (long) per square foot (long tonf/ft²)torr → ton-force (long) per square inch (long tonf/in²)torr → kip-force per square inch (kip/in²)torr → pound-force per square foot (lbf/ft²)torr → pound-force per square inch (lbf/in²)torr → poundal per square foot (pdl/ft²)torr → centimeter mercury (0°c) (cmHg)torr → inch mercury (32°f) (inHg)torr → inch mercury (60°f) (inHg)torr → centimeter water (4°c) (cmH₂O)torr → millimeter water (4°c) (mmH₂O)torr → inch water (4°c) (inAq)torr → foot water (4°c) (ftAq)torr → inch water (60°f) (inAq)torr → foot water (60°f) (ftAq)torr → atmosphere technical (at)