1 bar is equal to approximately 29.53 inHg.
The bar and inHg are both units to measure pressure, but they use different scales. One bar is defined as 100,000 Pascals, while 1 inHg (inch of mercury) corresponds to the pressure exerted by a mercury column one inch high at standard gravity. Converting bar to inHg involves multiplying by the exact ratio between these units.
Conversion Tool
Result in inhg:
Conversion Formula
The formula to convert bar to inHg is:
inHg = bar × 29.529983071445
This works because 1 bar is exactly equal to 100,000 Pascals, and 1 inHg equals 3,386.389 Pascals. Dividing 100,000 by 3,386.389 gives you roughly 29.53, which is the conversion factor.
For example, converting 1 bar:
- Start with pressure in bar: 1 bar
- Multiply by conversion factor: 1 × 29.529983071445 = 29.53 inHg
- Result: approximately 29.53 inHg
Conversion Example
- 2.5 bar to inHg:
- Multiply 2.5 by 29.529983071445
- 2.5 × 29.529983071445 = 73.8249577 inHg
- Result: about 73.82 inHg
- 0.75 bar to inHg:
- Multiply 0.75 by 29.529983071445
- 0.75 × 29.529983071445 = 22.1474873 inHg
- Result: approximately 22.15 inHg
- 5 bar to inHg:
- Multiply 5 by 29.529983071445
- 5 × 29.529983071445 = 147.65 inHg
- Result: roughly 147.65 inHg
- 10.2 bar to inHg:
- Multiply 10.2 by 29.529983071445
- 10.2 × 29.529983071445 = 301.21 inHg
- Result: about 301.21 inHg
Conversion Chart
| Bar | inHg |
|---|---|
| -24.0 | -708.72 |
| -20.0 | -590.60 |
| -16.0 | -472.48 |
| -12.0 | -354.36 |
| -8.0 | -236.24 |
| -4.0 | -118.12 |
| 0.0 | 0.00 |
| 2.0 | 59.06 |
| 4.0 | 118.12 |
| 6.0 | 177.18 |
| 8.0 | 236.24 |
| 10.0 | 295.30 |
| 12.0 | 354.36 |
| 14.0 | 413.42 |
| 16.0 | 472.48 |
| 18.0 | 531.54 |
| 20.0 | 590.60 |
| 22.0 | 649.66 |
| 24.0 | 708.72 |
| 26.0 | 767.78 |
The chart shows bar values from negative to positive range, with their equivalent in inHg. You can quick lookup pressures without calculator by matching bar to the corresponding inHg value in table.
Related Conversion Questions
- How many inches of mercury equal 1 bar pressure?
- What is the inHg value for 1 bar in weather measurements?
- Is 1 bar higher or lower than 29 inHg?
- How to convert 1 bar into inches of mercury manually?
- What does 1 bar convert to inHg for tire pressure?
- How does 1 bar compare to standard atmospheric pressure in inHg?
- Can I use 1 bar equals 29.53 inHg for scientific calculations?
Conversion Definitions
Bar: A bar is a unit of pressure equal to 100,000 Pascals. It is widely used in meteorology, engineering, and physics for measuring pressure levels. One bar is slightly less than the average atmospheric pressure at sea level, which is about 1.01325 bar.
inHg: Inch of mercury (inHg) is a pressure measurement based on the height of a mercury column in inches. It originated from barometer readings and is common in aviation and weather forecasting. Standard atmospheric pressure equals about 29.92 inHg.
Conversion FAQs
Why does 1 bar equal roughly 29.53 inHg?
This is due to the relationship between the Pascal unit and mercury column pressure. One bar is defined as 100,000 Pascals, while 1 inHg corresponds to the pressure exerted by a mercury column 1 inch tall, which equals approximately 3,386.389 Pascals. Dividing 100,000 by 3,386.389 results in about 29.53.
Can negative bar values be converted to inHg?
Yes, negative pressure in bar simply converts to a negative inHg value by the same multiplication. Negative pressures represent vacuum or pressures below atmospheric level. The conversion factor remains unchanged regardless of sign.
Is the conversion factor exact or approximate?
The factor 29.529983071445 is very precise, based on SI unit definitions. But practical applications might round it to 29.53 for simplicity. Using the exact factor ensures higher accuracy in calculations.
Can I convert bar to inHg without a calculator?
Using the approximate factor 29.53, you can estimate inHg by multiplying bar by about 30 then subtracting a small amount. For example, 1 bar × 30 = 30, minus 0.5 gives roughly 29.5 inHg, close enough for rough estimates.
Why is inHg used instead of bar in some fields?
InHg is traditional in meteorology and aviation, especially in the USA, because barometers historically used mercury columns. Bar is common in scientific and engineering contexts due to its SI unit base. Choice depends on convention and regional standards.