Standard atmospheres to pascals (atm to Pa)
Convert standard atmospheres to pascals. For pressure, 1 atm equals 101325 Pa.
Converter
atm to Pa conversion table
| Standard atmospheres | Pascals |
|---|---|
| 1 atm | 101325 Pa |
| 2 atm | 202650 Pa |
| 5 atm | 506625 Pa |
| 10 atm | 1013250 Pa |
| 25 atm | 2533125 Pa |
| 50 atm | 5066250 Pa |
| 100 atm | 10132500 Pa |
| 1000 atm | 101325000 Pa |
Formula
Pa = atm × 101325
Worked example
25 atm × 101325 = 2533125 Pa
Popular conversion examples
Choose an example to open this converter with the value filled in. These are useful examples, not a claim about search rankings.
- 1 atm to Pa = 101325 Pa
- 5 atm to Pa = 506625 Pa
- 100 atm to Pa = 10132500 Pa
- 1.2 atm to Pa = 121590 Pa
- 1 Pa to atm = 0.00000986923 atm
- 10 Pa to atm = 0.0000986923 atm
About standard atmospheres and pascals
Standard atmosphere (atm)
A standard atmosphere is exactly 101,325 pascals. It is used as a reference pressure in chemistry, physics and diving.
Pascal (Pa)
The pascal is the SI unit of pressure: one newton per square meter. It is used in physics and engineering, usually with prefixes such as kPa and MPa.
Both are units of pressure; the base unit used internally is Pa.
Notes
- Standard atmosphere = 101,325 Pa; bar = 100,000 Pa; psi = pound-force per square inch using standard gravity (≈ 6894.757 Pa).
- mmHg is the conventional millimeter of mercury (133.322387415 Pa) and the torr is exactly 1/760 of a standard atmosphere (≈ 133.3224 Pa); the two differ by about 0.000014 %.
- Absolute and gauge pressure are not distinguished: no gauge offset is applied. Negative values are accepted so that gauge vacuum readings can be converted.
atm to Pa FAQs
How do I convert standard atmospheres to pascals?
Multiply the number of standard atmospheres by 101325 to get pascals. For example, 25 atm × 101325 = 2533130 Pa.
How many pascals are in one standard atmosphere?
1 atm = 101325 Pa and 1 Pa = 0.000009869232667 atm. To go the other way, use the pascals to standard atmospheres converter.
How many pascals are in 3 standard atmospheres?
3 atm = 303975 Pa, rounded to 6 significant digits. Change the value in the converter above for any other amount.
How many pascals are in 2 standard atmospheres?
2 atm = 202650 Pa, rounded to 6 significant digits.
Is the atm to Pa conversion exact?
Yes. The factor 101325 follows directly from the unit definitions (A standard atmosphere is exactly 101,325 pascals; the pascal is the SI unit of pressure: one newton per square meter), so the only rounding is in the digits you choose to display.
What is the difference between standard atmospheres and pascals?
A standard atmosphere is exactly 101,325 pascals. It is used as a reference pressure in chemistry, physics and diving. The pascal is the SI unit of pressure: one newton per square meter. It is used in physics and engineering, usually with prefixes such as kPa and MPa.
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