Atmosphere to Kilopascal (atm to kPa)
Result
101.325 Kilopascal
Formula
kPa = atm × 101.325
1 atm = 101.325 kPa, and 1 kPa = 0.009869232667 atm.
The pascal is one newton per square metre. The bar is exactly 100,000 Pa, the standard atmosphere exactly 101,325 Pa, the torr exactly 1/760 atm, and psi is one pound-force per square inch (6,894.757 Pa).
Worked examples
- 1 atm × 101.325 = 101.325 kPa
- 10 atm × 101.325 = 1,013.25 kPa
- 100 atm × 101.325 = 10,132.5 kPa
Common mistakes
- Tyre and compressor gauges read gauge pressure — pressure above the surrounding air. Absolute pressure is about 1 atm (14.7 psi, 1.013 bar) higher.
- Weather maps use hectopascals (1 hPa = 100 Pa = 1 millibar); standard sea-level pressure is 1,013.25 hPa.
- Torr and mmHg differ by less than one part per million and are interchangeable for practical purposes.
Atmosphere to Kilopascal table
| Atmosphere (atm) | Kilopascal (kPa) |
|---|---|
| 1 | 101.325 |
| 2 | 202.65 |
| 5 | 506.625 |
| 10 | 1,013.25 |
| 20 | 2,026.5 |
| 50 | 5,066.25 |
| 100 | 10,132.5 |
| 1,000 | 101,325 |
The units
- Atmosphere (atm)
- The standard atmosphere: exactly 101,325 Pa.
- Kilopascal (kPa)
- 1 Kilopascal = 1,000 Pascal.
Sources for these factors
- The International System of Units (SI Brochure), 9th edition — BIPM
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy