Convert Atmosphere to Hectopascal
Type the number of atmospheres that you wish to convert to hectopascals.
How to Convert Atmospheres to Hectopascals
The atmosphere and hectopascal are both units of pressure. 1 atmosphere equals 1013.25 hectopascals. This means to convert atmospheres to hectopascals, you multiply by 1013.25.
Formula
Step-by-Step Example
Convert 5 atm to hectopascals:
We need to convert atmospheres to hectopascals
Since 1 atm = 1013.25 hPa, multiply by 1013.25
5 × 1013.25 = 5066.25
5 atm = 5066.25 hPa
Atmosphere to Hectopascal Conversion Table
Quick reference table for common atmosphere to hectopascal conversions. Click any value for detailed calculation.
| Atmospheres (atm) | Hectopascals (hPa) |
|---|---|
| 0.1 atm | 101.325 hPa |
| 0.5 atm | 506.625 hPa |
| 1 atm | 1013.25 hPa |
| 2 atm | 2026.5 hPa |
| 5 atm | 5066.25 hPa |
| 10 atm | 10132.5 hPa |
| 25 atm | 25331.25 hPa |
| 50 atm | 50662.5 hPa |
| 100 atm | 101325 hPa |
About These Units
Atmosphere (atm)
One standard atmosphere (atm) equals 101,325 Pascals, 1.01325 bar, or 14.696 PSI—the average air pressure at sea level. Atmospheres measure diving depth (every 10 meters adds ~1 atm), altitude effects, and chemical reactions. Used as a reference pressure in science.
Hectopascal (hPa)
A hectopascal (hPa) equals 100 Pascals and is identical to one millibar. Hectopascals are the standard unit for atmospheric pressure in meteorology and aviation worldwide. Standard sea level pressure is 1013.25 hPa. Weather maps display pressure in hPa.
Frequently Asked Questions
How do I convert atmospheres to hectopascals?
To convert atmospheres to hectopascals, multiply the value by 1013.25. For example, 10 atm = 10132.5 hPa.
How many hectopascals are in 1 atmosphere?
1 atmosphere equals 1013.25 hectopascals.
What is the formula for atmospheres to hectopascals?
The formula is: hPa = atm × 1013.25.