PSI to Hectopascals Converter
Enter the pressure in psi below to convert it to hectopascals.
Convert PSI to Hectopascals
Enter a value in psi (psi) to convert to hectopascals (hPa).
Pounds per Square Inch to Hectopascal Conversion Table
Table showing various pounds per square inch measurements converted to hectopascals. Click any preset value or arrow to load it into the converter.
| PSI (psi) | Hectopascals (hPa) |
|---|---|
| 1 psi | 68.9475729 hPa |
| 2 psi | 137.8951459 hPa |
| 2.5 psi | 172.3689323 hPa |
| 5 psi | 344.7378647 hPa |
| 10 psi | 689.4757293 hPa |
| 15 psi | 1,034.213594 hPa |
| 20 psi | 1,378.9514586 hPa |
| 25 psi | 1,723.6893233 hPa |
| 30 psi | 2,068.427188 hPa |
| 50 psi | 3,447.3786466 hPa |
How to Convert PSI to Hectopascals
To convert psi to hectopascals, multiply the pressure by the following conversion ratio: 68.9475729 hectopascals/pounds per square inch.
Since one pounds per square inch is equal to 68.9475729 hectopascals, you can use this simple formula to convert:
The pressure in hectopascals is equal to the pressure in psi multiplied by 68.9475729.
For example, here's how to convert 5 psi to hectopascals using the formula above.
How Many Hectopascals Are in a Pounds per Square Inch?
There are 68.9475729 hectopascals in a pounds per square inch, which is why we use this value in the formula above.
Our pounds per square inch to hectopascal calculator automatically converts your pressure measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
PSI and hectopascals are both units used to measure pressure. Keep reading to learn more about each unit.
What Is a Pounds per Square Inch?
A pounds per square inch is a unit of pressure equal to 6,894.7572932 pascals (Pa), the base unit for pressure. Imperial & US pressure unit equal to 1 pound-force per square inch (6.89476 kPa). [1]
The pounds per square inch is classified as a US customary and imperial unit of pressure. PSI can be abbreviated as psi; for example, 1 pounds per square inch can be written as 1 psi.
When working with psi (psi) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, psi (psi) are widely used across large-scale industrial, bulk, and macro-level pressure specifications within US customary and imperial workflows, engineering documentation, and technical data sheets.
What Is a Hectopascal?
A hectopascal is a unit of pressure equal to 100 pascals (Pa), the base unit for pressure. Equal to 100 Pascals (identical to 1 millibar). [2]
The hectopascal is classified as a metric and SI-compatible unit of pressure. Hectopascals can be abbreviated as hPa; for example, 1 hectopascal can be written as 1 hPa.
In the metric system, "hecto" is the standard SI prefix for hundreds, or 10². This makes the hectopascal (hPa) a convenient decimal multiple of the pascal (Pa).
In practice, hectopascals (hPa) are widely used across standard pressure applications within SI metric workflows, engineering documentation, and technical data sheets.
When converting pressure between psi (psi) and hectopascals (hPa), keep full floating-point precision (1 psi = 68.9475729 hPa; 1 hPa = 0.0145038 psi) during intermediate calculations and round only the final hectopascal figure to match your instrument tolerance.
More Pounds per Square Inch & Hectopascal Conversions
Need to calculate in the opposite direction? Use our hectopascals to psi calculator to switch your starting unit immediately. You can also explore related tools such as converting hectopascals to psi, converting pascals to hectopascals, or converting inches of mercury to hectopascals.
Convert from PSI
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))·Pressure Metrology Standard — PSI (psi) to Hectopascals (hPa)
- [2]NIST CUU SpecificationNIST CUU (Derived SI Unit: Pascal (Pa))·Unit Specifications: Pounds per Square Inch (psi) & Hectopascal (hPa)
- [3]BIPM ReferenceBIPM (SI Brochure (9th Ed.) — Mechanics)·Conversion Factors & Mathematical Basis (psi to hPa)