🌦️ Barometric Pressure Converter
Switch between weather-friendly pressure units instantly.
Ideal for pilots, meteorologists, and hobbyist weather stations translating readings for different audiences.
Sea-level standard pressure ≈ 1013.25 hPa
1013.25 Hectopascals (hPa) equals
29.9213 Inches of mercury (inHg)
Other Weather Units
Hectopascals (hPa)
1,013.25
Millibar (mbar)
1,013.25
Kilopascals (kPa)
101.325
Millimeters of mercury (mmHg)
759.99989
Torr (Torr)
760
Atmospheres (atm)
1
How to Use This Calculator
Input the reading
Enter the barometer value from your station, METAR, or forecast.
Select the units
Pick the origin and target units—common combos include hPa ↔ inHg.
Review all conversions
Use the quick reference grid to publish dashboards or share reports in familiar units.
Formula
Pascals = Input × unitFactor
Target Value = Pascals ÷ targetFactor
Key factors: 1 hPa = 100 Pa, 1 inHg ≈ 3,386.39 Pa, 1 atm = 101,325 Pa
Use the formula breakdown to confirm the calculation logic or perform the conversion manually if needed.
Full Description
Weather instruments worldwide use different standards. Aviation relies on inches of mercury, meteorologists use hectopascals, and scientists prefer Pascals or atmospheres. This converter bridges them all.
Because conversions route through Pascals, you gain SI traceability without memorizing individual factors each time.
Use it to cross-check METAR altimeter settings, translate forecast data for social media, or compare research measurements across regions.
Frequently Asked Questions
Is hPa the same as millibar?
Yes. 1 hPa equals 1 millibar. Many weather services treat the units interchangeably.
Why include Torr and atm?
They help bridge meteorological data with laboratory and vacuum measurements, especially in environmental research.
Does altitude affect the conversion?
The conversion is purely unit-based. Apply altitude adjustments to your input before converting if needed.
What about psig?
Gauge pressure isn’t typically used for barometric readings. Use the bar-to-psig converter for industrial applications.
Frequently Asked Questions
What does the Barometric Pressure Conversion do?
Convert barometric pressure conversion instantly with this free online converter. Useful for conversion tasks. Accurate results in your browser. No signup. Enter your values above to see results instantly in your browser. This page is part of Try To Calculator's free online calculator collection.
Is the Barometric Pressure Conversion free?
Yes. Try To Calculator tools are free to use and do not require an account for this page.
Are my inputs sent to your servers?
No. Calculations run locally in your browser; we do not collect the numbers you type or the results shown.
Is the Barometric Pressure Conversion a substitute for professional advice?
This tool is for education and quick estimates. For medical, legal, tax, or financial decisions, confirm results with a qualified professional.
Where can I find related calculators?
Use the category navigation or the related tools section below to browse more Conversion calculators on Try To Calculator.