bar to atm
1 bar (bar) equals 0.9869 atm (atm). Type a value into either box below for an instant two-way conversion. For other units, use the full unit converter.
Chinese version: 巴转标准大气压
Conversion factor
1 bar = 0.9869 atm
Reverse: 1 atm = 1.013 bar
bar to atm converter
bar（bar）
atm（atm）
bar to atm conversion table
| bar | atm | Detail |
|---|---|---|
| 1 | 0.9869 | 1 bar to atm |
| 1.013 | 1 | 1.013 bar to atm |
| 2 | 1.974 | 2 bar to atm |
| 5 | 4.935 | 5 bar to atm |
| 10 | 9.869 | 10 bar to atm |
| 100 | 98.69 | 100 bar to atm |
How to convert
To convert bar to atm, multiply: atm = bar × 0.9869
To convert atm to bar, divide: bar = atm ÷ 0.9869 (equivalently × 1.013).
Example: 1.013 bar × 0.9869 = 1 atm. The factor is derived from the international definition of each unit; results are shown to 4 significant figures.
Frequently asked questions
1.013 bar = 1 atm. The formula is: value in bar × 0.9869 = value in atm. Use the converter above to convert any value instantly.
1 atm = 1.013 bar. To convert back, divide the atm value by 0.9869 (or multiply by 1.013).
atm = bar × 0.9869; conversely bar = atm ÷ 0.9869. For example, 1.013 bar × 0.9869 = 1 atm. The factor comes from the international definition of the units.
More conversions
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.