Atmosphere to Torr (atm to Torr)
Result
760 Torr
Formula
Torr = atm × 760
1 atm = 760 Torr, and 1 Torr = 0.001315789474 atm.
The pascal is one newton per square metre. The bar is exactly 100,000 Pa, the standard atmosphere exactly 101,325 Pa, the torr exactly 1/760 atm, and psi is one pound-force per square inch (6,894.757 Pa).
Worked examples
- 1 atm × 760 = 760 Torr
- 10 atm × 760 = 7,600 Torr
- 100 atm × 760 = 76,000 Torr
Common mistakes
- Tyre and compressor gauges read gauge pressure — pressure above the surrounding air. Absolute pressure is about 1 atm (14.7 psi, 1.013 bar) higher.
- Weather maps use hectopascals (1 hPa = 100 Pa = 1 millibar); standard sea-level pressure is 1,013.25 hPa.
- Torr and mmHg differ by less than one part per million and are interchangeable for practical purposes.
Atmosphere to Torr table
| Atmosphere (atm) | Torr (Torr) |
|---|---|
| 1 | 760 |
| 2 | 1,520 |
| 5 | 3,800 |
| 10 | 7,600 |
| 20 | 15,200 |
| 50 | 38,000 |
| 100 | 76,000 |
| 1,000 | 760,000 |
The units
- Atmosphere (atm)
- The standard atmosphere: exactly 101,325 Pa.
- Torr (Torr)
- 1 Torr = 133.3223684 Pascal.
Sources for these factors
- The International System of Units (SI Brochure), 9th edition — BIPM
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy