Question

What is the value of 1 bar in atmospheric pressure?

Answer 1

the value of one bar pressure into atmospheric pressure is nearly
1bar=0.98atm.

Answer 2

$\huge\mathfrak\color{blue}{Answer}$

It is defined as exactly equal to 100,000 Pa (100 kPa), or slightly less than the current average atmospheric pressure on Earth at sea level (approximately 1.013 bar). By the barometric formula, 1 bar is roughly the atmospheric pressure on Earth at an altitude of 111 metres at 15 °C.