Atmospheres to Bar Converter
Convert atmospheres to bar instantly. Exact factor: 1 atm = 1.013 bar.
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Convert atmospheres to bar
The exact conversion factor is 1 atm = 1.013 bar. Type any value and the result updates instantly; the math is shown beneath the board.
Worked by hand
Multiply the atmospheres value by 1.013 to get bar.
Worked example
- Take 1 atm
- multiply by 1.013
- the result is 1.013 bar
How to use it
- Enter your atmospheres
- Read the bar result
- Check the factor line to verify by hand
Frequently asked questions
How many bar are in one atmospheres?
Exactly 1.013 bar, by the SI/NIST definition.
How do I convert bar back to atmospheres?
Divide by 1.013 — or use the full converter where both directions are one click.
Is this rounding or exact?
The factor is exact; only the displayed decimals are rounded.