⚖️ atm to Pa Converter
Turn atmospheric pressure readings into Pascals for physics and engineering calculations.
Ideal for lab work, HVAC sizing, and scientific reporting that demands SI units.
1 Atmospheres (atm) equals
101,325 Pascals (Pa)
Quick Reference
Kilopascals: 101.325 kPa
How to Use This Calculator
Input atm
Enter the pressure value in atmospheres from gauges or reference tables.
Read Pascals
The converter displays the SI equivalent in Pascals with high precision.
Check kPa
Use the kilopascal reference for weather and engineering documentation.
Formula
1 atm = 101,325 Pa
Pascals = atm × 101,325
kPa = atm × 101.325
Use the formula breakdown to confirm the calculation logic or perform the conversion manually if needed.
Full Description
The Pascal is the SI unit for pressure. Converting atmospheres to Pascals ensures compatibility with scientific equations, engineering software, and international standards.
Whether you’re modeling fluid systems or calibrating lab equipment, using Pascals keeps your calculations consistent and easily shareable.
Kilopascals offer a convenient shorthand (1 atm ≈ 101.325 kPa), so the converter provides that reference automatically.
Frequently Asked Questions
Why is 1 atm equal to 101,325 Pa?
It’s defined that way based on the average sea-level atmospheric pressure on Earth, standardized for SI units.
Can I convert Pascals back to atm?
Yes. Divide Pascals by 101,325 or use the atm conversion tool for quick multi-unit comparisons.
Does temperature affect this conversion?
The conversion is purely unit-based. Temperature matters only when calculating related properties like density.
What about absolute vs. gauge?
Atmospheres and Pascals are absolute pressures. For gauge pressure, use psig or kPa(g) converters.