atm to bar
1 atm (atm) equals 1.013 bar (bar). Type a value into either box below for an instant two-way conversion. For other units, use the full unit converter.
Chinese version: 标准大气压转巴
Conversion factor
1 atm = 1.013 bar
Reverse: 1 bar = 0.9869 atm
atm to bar converter
atm（atm）
bar（bar）
atm to bar conversion table
| atm | bar | Detail |
|---|---|---|
| 0.5 | 0.5066 | 0.5 atm to bar |
| 1 | 1.013 | 1 atm to bar |
| 2 | 2.026 | 2 atm to bar |
| 5 | 5.066 | 5 atm to bar |
| 10 | 10.13 | 10 atm to bar |
| 100 | 101.33 | 100 atm to bar |
How to convert
To convert atm to bar, multiply: bar = atm × 1.013
To convert bar to atm, divide: atm = bar ÷ 1.013 (equivalently × 0.9869).
Example: 1 atm × 1.013 = 1.013 bar. The factor is derived from the international definition of each unit; results are shown to 4 significant figures.
Frequently asked questions
1 atm = 1.013 bar. The formula is: value in atm × 1.013 = value in bar. Use the converter above to convert any value instantly.
1 bar = 0.9869 atm. To convert back, divide the bar value by 1.013 (or multiply by 0.9869).
bar = atm × 1.013; conversely atm = bar ÷ 1.013. For example, 1 atm × 1.013 = 1.013 bar. The factor comes from the international definition of the units.
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Disclaimer: conversion factors are derived from international unit definitions and results are for reference only. For trade settlement, engineering or legal documents, follow the contract or official metrology standards.