Edit either value. Decimals and scientific notation supported.
1
hPa
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PascalPa
KilopascalkPa
MegapascalMPa
Barbar
Millibarmbar
HectopascalhPa
Standard atmosphereatm
Pounds per square inchpsi
TorrTorr
Conventional millimetre of mercurymmHg
No units found. Try a name or symbol.
0.001
bar
esc
PascalPa
KilopascalkPa
MegapascalMPa
Barbar
Millibarmbar
HectopascalhPa
Standard atmosphereatm
Pounds per square inchpsi
TorrTorr
Conventional millimetre of mercurymmHg
No units found. Try a name or symbol.
CONVERSION
1 hPa ≈ 0.001 bar
6 significant figures
10 significant figures
15 significant figures
Precision changes displayed rounding, not calculation accuracy.
FORMULAbar = hPa ÷ 1000
FORMULA & EXAMPLES
How to convert Hectopascals to bar
bar = hPa ÷ 1000
Divide the hPa reading by 1000.
Worked examples
1 hPa ≈ 0.001 bar
1 ÷ 1000 ≈ 0.001
1013.25 hPa ≈ 1.01325 bar
1013.25 ÷ 1000 ≈ 1.01325
Frequently asked questions
Does hPa to bar change gauge pressure into absolute pressure?
No. Unit conversion preserves the original pressure reference. Converting a gauge reading to absolute pressure additionally requires the applicable atmospheric pressure.
Hectopascals to bar table
Fixed reference · Hectopascal to Bar
Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.
Hectopascal (hPa)
Bar (bar)
0
0
0.1
0.0001
0.5
0.0005
1
0.001
2
0.002
5
0.005
10
0.01
25
0.025
50
0.05
100
0.1
1000
1
Table results use 10 significant figures; decimal formula coefficients use up to 15. Calculations use the unit definitions before rounding. Extra digits do not improve measurement accuracy.