Inches of mercury.
inHgs to Attopascals Converter — inHg to aPa
Convert inHg (inHg) to Attopascal (aPa) using the exact conversion factor (1 inhg = 3.386389e+21 attopascal). See the formula, worked examples, and conversion table.
inHgs to Attopascals converter
Converter
Pressure Converter
Convert pascals, bars, PSI, atmospheres, mercury columns, water columns, and engineering pressure units.
Context values
Some unit families need one extra value for a physically accurate result.
Attopascal is 1e-18 pascal units.
Result = input x 3386.389 / 1e-18.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting inHgs to Attopascals
inHg and Attopascal both show up on pressure gauges — psi is standard on US tire and tool specifications, while bar is the everyday pressure unit across most of the rest of the world. Specifically: Inches of mercury, and attopascal is 1e-18 pascal units.
Formula
attopascals = inhgs × 3.386389e+21
This factor comes from each unit's defined relationship to the category's base unit: 1 inhg equals 3386.389 base units, and 1 attopascal equals 1e-18 base units, so dividing one by the other gives the direct inhg-to-attopascal factor of 3.386389e+21.
Simple example
1 inHg × 3.386389e+21 = 3.386389e+21 aPa
1 inhg = 3.386389e+21 attopascals.
Real-world example
35 inHg × 3.386389e+21 = 1.185236e+23 aPa
35 inhgs = 1.185236e+23 attopascals.
Conversion table
| inHg (inHg) | Attopascal (aPa) |
|---|---|
| 1 inHg | 3.386389e+21 aPa |
| 5 inHg | 1.693194e+22 aPa |
| 10 inHg | 3.386389e+22 aPa |
| 25 inHg | 8.465972e+22 aPa |
| 50 inHg | 1.693194e+23 aPa |
| 100 inHg | 3.386389e+23 aPa |
Reverse conversion: Attopascal to inHg
3.386389e+21 aPa × 2.952998e-22 = 1 inHg
3.386389e+21 attopascals = 1 inhg.
inhgs = attopascals × 2.952998e-22
For a page dedicated to this direction, see Attopascal to inHg.
Understanding the inHg (inHg)
Inches of mercury.
Understanding the Attopascal (aPa)
Attopascal is 1e-18 pascal units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many attopascals are in 1 inhg?
1 inhg equals 3.386389e+21 attopascals, using the exact defined conversion factor rather than an estimate.
How do I convert inhg to attopascal?
Multiply the inhg value by 3.386389e+21. The converter above does this instantly to whatever precision you set.
How do I convert attopascal back to inhg?
Use the reverse factor: 1 attopascal equals 2.952998e-22 inhgs. You can also use the swap control in the converter above to flip the direction instantly.
What is a inhg?
inHg (inHg) is a unit of pressure.
What is a attopascal?
Attopascal (aPa) is a unit of pressure.
Is the inhg to attopascal conversion exact?
Yes. Both inhg and attopascal are defined by fixed standards rather than physical artifacts, so the factor of 3.386389e+21 used above is exact to as many digits as you choose to display.