Bar to Torr Converter
Enter the value that you want to convert bar to torr or torr to bar.
1 bar = 750.0616827 torr
Formula: torr = bar value × 750.0616827
bar to torr
10 bar = 7500.61683 torr
Popular Pressure Converters:
How Bar Relates to Torr
The Bar in Engineering
Bar (bar) is a unit of pressure measurement. 1 bar is equal to 750.0616827 torr.
What is Torr?
Torr (Torr) is a unit of pressure measurement. 1 torr is equal to 0.0013332 bar.
Pressure Units Across Industries
Pressure measurements vary dramatically by industry. Meteorologists report in millibars or hectopascals, tire shops use PSI, scuba divers think in atmospheres or bar, vacuum engineers work in torr, and hydraulic systems specify in megapascals. A single industrial plant might encounter all these units across different equipment manuals, safety datasheets, and regulatory standards from different countries.
bar to torr metric conversion table
| 0.01 bar | = | 7.50062 Torr |
| 0.1 bar | = | 75.00617 Torr |
| 1 bar | = | 750.06168 Torr |
| 2 bar | = | 1500.12337 Torr |
| 3 bar | = | 2250.18505 Torr |
| 4 bar | = | 3000.24673 Torr |
| 5 bar | = | 3750.30841 Torr |
| 6 bar | = | 4500.37010 Torr |
| 7 bar | = | 5250.43178 Torr |
| 8 bar | = | 6000.49346 Torr |
| 9 bar | = | 6750.55514 Torr |
| 10 bar | = | 7500.61683 Torr |
| 11 bar | = | 8250.67851 Torr |
| 12 bar | = | 9000.74019 Torr |
| 13 bar | = | 9750.80188 Torr |
| 14 bar | = | 10500.86356 Torr |
| 15 bar | = | 11250.92524 Torr |
| 16 bar | = | 12000.98692 Torr |
| 17 bar | = | 12751.04861 Torr |
| 18 bar | = | 13501.11029 Torr |
| 19 bar | = | 14251.17197 Torr |
| 20 bar | = | 15001.23365 Torr |
| 30 bar | = | 22501.85048 Torr |
| 40 bar | = | 30002.46731 Torr |
| 50 bar | = | 37503.08414 Torr |
| 60 bar | = | 45003.70096 Torr |
| 70 bar | = | 52504.31779 Torr |
| 80 bar | = | 60004.93462 Torr |
| 90 bar | = | 67505.55144 Torr |
| 100 bar | = | 75006.16827 Torr |
| 200 bar | = | 150012.33654 Torr |
| 300 bar | = | 225018.50481 Torr |
| 400 bar | = | 300024.67308 Torr |
| 500 bar | = | 375030.84136 Torr |
| 600 bar | = | 450037.00963 Torr |
| 700 bar | = | 525043.17790 Torr |
| 800 bar | = | 600049.34617 Torr |
| 900 bar | = | 675055.51444 Torr |
| 1000 bar | = | 750061.68271 Torr |
How to Convert Bar to Torr?
We can convert bar to torr by using an example.
Example:
Convert 20 Bar to Torr?
We know 1 Bar = 750.0616827 torr; 1 Torr = 0.0013332 bar.
20 bar = ___Torr
20 × 750.0616827 = 15001.23365 Torr (we know 1 bar = 750.0616827 torr)
Answer:
20 bar = 15001.23365 torr
How to Convert Bar to Torr (Step-by-Step)
Converting bar to torr is critical in vacuum technology, thin film deposition, and mass spectrometry. The conversion factor is 1 bar = 750.062 torr. The torr is named after Evangelista Torricelli, inventor of the barometer.
- Write down the pressure value in bar.
- Multiply the bar value by 750.062.
- The result is the equivalent pressure in torr.
- For quick approximation, multiply by 750 (error < 0.01%).
Common Bar to Torr Conversions
Pressure values across the vacuum spectrum from rough vacuum to ultra-high vacuum, relevant to semiconductor and coating industries.
| Bar | Torr |
|---|---|
| 1.01325 bar | 760 torr |
| 1 bar | 750.06 torr |
| 0.1 bar | 75.0 torr |
| 0.01 bar | 7.50 torr |
| 0.001 bar | 0.750 torr |
| 0.0001 bar | 0.075 torr |
| 0.00001 bar | 0.0075 torr |
| 0.000001 bar | 0.00075 torr |
Solved Examples: Bar to Torr
Question 1: A sputtering chamber evacuates to 0.000005 bar before deposition. What is this in torr?
Solution:
Pressure in torr = 0.000005 × 750.062
= 0.00375 torr
= 3.75 × 10⁻³ torr = 3.75 millitorr
Answer: 5 × 10⁻⁶ bar = 3.75 millitorr — adequate base pressure for magnetron sputtering.
Question 2: A vacuum oven operates at 0.013 bar for drying. Express in torr.
Solution:
Pressure in torr = 0.013 × 750.062
= 9.75 torr
Answer: 0.013 bar = 9.75 torr — sufficient for low-temperature solvent evaporation.
Question 3: A mass spectrometer requires 10⁻⁷ torr operating pressure. What is this in bar?
Solution:
Pressure in bar = 10⁻⁷ ÷ 750.062
= 1.33 × 10⁻¹⁰ bar
Answer: 10⁻⁷ torr = 1.33 × 10⁻¹⁰ bar — ultra-high vacuum for ion detection.
Question 4: A rotary vane pump achieves an ultimate vacuum of 0.0005 bar. Convert to torr.
Solution:
Pressure in torr = 0.0005 × 750.062
= 0.375 torr
Answer: 0.0005 bar = 0.375 torr — typical limit for a single-stage rotary pump.
Practice Questions: Bar to Torr
Try solving these on your own to test your understanding:
- Convert 0.5 bar to torr. (Answer: 375.03 torr)
- A freeze dryer operates at 0.001 bar. Express in torr. (Answer: 0.750 torr)
- Convert 0.1 bar to torr. (Answer: 75.01 torr)
- A turbomolecular pump reaches 10⁻⁸ bar. What is this in torr? (Answer: 7.5 × 10⁻⁶ torr)
- Convert 2 bar to torr. (Answer: 1500.12 torr)
Vacuum Technology: Why Torr Persists
Despite the SI system favoring pascals, the torr remains deeply entrenched in vacuum science. This stems from the historical mercury manometer — 1 torr ≈ 1 mmHg. Vacuum pump specifications, leak rate testing (torr·L/s), and thin film deposition recipes all reference torr. The semiconductor industry in particular uses torr for plasma process pressures (typically 1-100 millitorr for plasma etching).
Thin Film Deposition and Sputtering Pressures
Physical vapor deposition (PVD) processes require specific pressure ranges in torr: base pressure before deposition should be <5 × 10⁻⁶ torr to minimize contaminant incorporation. Sputtering occurs at 1-10 millitorr of argon gas. Evaporation requires <10⁻⁵ torr. These pressures directly affect film quality, adhesion, and deposition rate. Converting from bar-rated gauges to torr process specs is daily work in coating facilities.
Mass Spectrometry Operating Pressures
Mass spectrometers operate at extreme vacuum: the ionization chamber at 10⁻⁵ to 10⁻⁶ torr, the mass analyzer at 10⁻⁶ to 10⁻⁸ torr, and the detector region at <10⁻⁷ torr. These ultra-low pressures (far below 10⁻⁷ bar) ensure ions travel without colliding with gas molecules. Turbo-molecular pumps backed by rotary pumps achieve these levels. A single fingerprint inside the chamber can outgas enough to prevent reaching operating vacuum.
Key Takeaways
- 1 bar = 750.062 torr (or approximately 750 torr).
- Standard atmosphere = 760 torr = 1.01325 bar.
- Vacuum ranges: rough (>1 torr), medium (10⁻³ to 1 torr), high (<10⁻³ torr).
- 1 torr ≈ 1 mmHg — the historic mercury barometer connection.
- Semiconductor sputtering: 1-10 millitorr (0.001-0.013 bar).
- The torr persists in vacuum technology despite SI preference for pascals.
Bar to Torr Conversion Formula
torr = bar × 750.0616827
1 bar = 750.0616827 torr
1 torr = 0.0013332 bar
Reverse: bar = torr × 0.0013332
Frequently Asked Questions
How many torr are in 1 bar?
There are 750.0616827 torr in 1 bar. To convert bar to torr, multiply the value by 750.0616827.
How do I convert bar to torr?
Multiply your bar value by 750.0616827 to get the equivalent in torr. For example, 5 bar = 5 × 750.0616827 = 3750.30841 torr.
How do I convert torr to bar?
Multiply your torr value by 0.0013332 to get the equivalent in bar. Alternatively, divide by 750.0616827.
What is 10 bar in torr?
10 bar is equal to 7500.61683 torr.
What is 100 bar in torr?
100 bar is equal to 75006.16827 torr.