Convert Pascal to Torr
Convert Pascals to Torr for vacuum, lab, and scientific applications using the precise Pa-to-Torr relationship.
How to Convert Pascal to Torr
To convert Pascal to Torr, divide Pascals by 133.322 because 1 Torr ≈ 133.322 Pa.
Conversion Formula:
value / 133.322Understanding the Conversion
Pascal to Torr is widely used in vacuum technology, semiconductor processes, and laboratory research. Torr is defined relative to standard atmospheric pressure (760 Torr ≈ 101,325 Pa), so dividing Pascals by 133.322 yields Torr. This lets you translate SI sensor outputs into the Torr scale commonly seen on vacuum gauges and process specs.
Vacuum regimes span many orders of magnitude: rough vacuum might be tens of Torr, while high and ultra-high vacuum reach below 10⁻³ Torr or lower. Converting from Pascals to Torr can quickly show whether a system is in the correct range for outgassing, leak checks, thin-film deposition, or electron microscopy.
The relationship is linear and reversible. Multiplying Torr by 133.322 returns Pascals. Keep a few anchors handy: 1 Torr ≈ 133.322 Pa, 10 Torr ≈ 1,333.22 Pa, and 760 Torr ≈ 101,325 Pa (1 atm).
Conversion Examples
Example: Convert 1,333.22 Pa to Torr
- Step 1: 1,333.22 ÷ 133.322 = 10.
- Step 2: Result is 10 Torr.
- Step 3: Confirms linear scaling.
1,333.22 Pa = 10 Torr
Handy mid-range vacuum example.
Example: Convert 101,325 Pa to Torr
- Step 1: 101,325 ÷ 133.322 ≈ 760.
- Step 2: Result is about 760 Torr.
- Step 3: Matches 1 atmosphere.
101,325 Pa ≈ 760 Torr
Standard atmospheric reference point.
Example: Convert 5 Pa to Torr
- Step 1: 5 ÷ 133.322 ≈ 0.0375.
- Step 2: Result is about 0.0375 Torr.
- Step 3: Shows high-vacuum range.
5 Pa ≈ 0.0375 Torr
Illustrates very low absolute pressures in Torr.
Conversion Formula
Torr is defined as 1/760 of standard atmosphere; using 101,325 Pa for 1 atm yields 133.322 Pa per Torr, so dividing Pa by 133.322 converts to Torr.
Conversion Chart
| Pascal | Torr |
|---|---|
| 1 | 0.0075 |
| 5 | 0.0375 |
| 10 | 0.075 |
| 100 | 0.75 |
| 500 | 3.75 |
| 1000 | 7.5 |
| 5000 | 37.5 |
| 10000 | 75 |
| 50000 | 375 |
| 101325 | 760 |
Quick Conversion Tip
Divide Pa by ~133 to get Torr; use 133.322 for precision.
Unit Definitions
Pascal (Pa)
SI pressure unit.
1 Torr ≈ 133.322 Pa; 1 atm = 101,325 Pa ≈ 760 Torr.
Torr (Torr)
Pressure unit historically based on 1/760 of standard atmosphere, used in vacuum science.
1 Torr ≈ 133.322 Pa; Torr to kPa divide by 7.50062; Torr to psi divide by 51.7149.
Common Use Cases
- Vacuum systems: convert sensor readings to Torr for process specs.
- Semiconductor and thin-film: express chamber pressures in Torr.
- Research labs: report vacuum levels for experiments and instruments.
- Leak testing: compare thresholds specified in Torr.
- Calibration: align SI Pascals with Torr-based gauges.
- Education: teach relationships between atmospheric pressure, Pa, and Torr.
Frequently Asked Questions
Why 133.322?
It comes from 101,325 Pa per atmosphere divided by 760 Torr per atmosphere.
Is Torr the same as mmHg?
They are close but not exact; 1 Torr is defined from standard atmosphere, while mmHg depends on mercury density and gravity. Use Torr for reproducible calculations.
How do I go back to Pa?
Multiply Torr by 133.322 to return to Pascals.