Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Unit Converters
SI Pascal Prefix Converter (Pa, hPa, kPa, MPa, GPa)
pascals · 420 prefix pairs
hectopascals
1,013.25 hPa
Multiply by 10^1. Same dimension; only the zeros move.
- You entered
- 101.325 kPa
- Factor
- 10^1
- In scientific notation
- 1.013250e+3
Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
From prefix
The “From prefix” value used in this tool’s formula. Adjust it to see results update live.
to = from × 10^(fromExp − toExp) on pascals. 1 hPa = 100 Pa; 1 kPa = 1,000 Pa.
Weather maps print hectopascals (same size as millibars). Tires in kilopascals. Hydraulics in megapascals. Material moduli in gigapascals. Standard atmosphere is 101,325 Pa = 101.325 kPa = 1,013.25 hPa.
How this calculator works
Weather maps print hectopascals (same size as millibars). Tires in kilopascals. Hydraulics in megapascals. Material moduli in gigapascals. Standard atmosphere is 101,325 Pa = 101.325 kPa = 1,013.25 hPa. to = from × 10^(fromExp − toExp) on pascals. 1 hPa = 100 Pa; 1 kPa = 1,000 Pa. Scenario: 101.325 kPa → 1,013.25 hPa → 0.101325 MPa.
to = from × 10^(fromExp − toExp) on pascals. 1 hPa = 100 Pa; 1 kPa = 1,000 Pa.
Scenario: 101.325 kPa → 1,013.25 hPa → 0.101325 MPa.
When to use this SI Pascal Prefix
Common use cases
- Weather maps print hectopascals (same size as millibars). Tires in kilopascals. Hydraulics in megapascals. Material moduli in gigapascals. Standard atmosphere is 101,325 Pa = 101.325 kPa = 1,013.25 hPa.
- Sanity-check with this scenario: 101.325 kPa → 1,013.25 hPa → 0.101325 MPa.
- The relationship is: to = from × 10^(fromExp − toExp) on pascals. 1 hPa = 100 Pa; 1 kPa = 1,000 Pa.
Localized examples
- Unit Converters: the example on this page uses the same formula as the widget.
What you get
- Fields: From prefix
- to = from × 10^(fromExp − toExp) on pascals. 1 hPa = 100 Pa; 1 kPa = 1,000 Pa.
- Scenario on the page: 101.325 kPa → 1,013.25 hPa → 0.101325 MPa.
How to Convert SI Pascal Prefix
- 1Enter From prefix. Use the values you have, not a catalog average, unless that is all you know.
- 2to = from × 10^(fromExp − toExp) on pascals. 1 hPa = 100 Pa; 1 kPa = 1,000 Pa.
- 3Scenario: 101.325 kPa → 1,013.25 hPa → 0.101325 MPa.
- 4Check which dictionary the other person is using — US or UK, decimal or 1,024 — then trust the number.
Governing formula
to = from × 10^(fromExp − toExp) on pascals. 1 hPa = 100 Pa; 1 kPa = 1,000 Pa.
101.325 kPa → 1,013.25 hPa → 0.101325 MPa.
101.325 kPa → 1,013.25 hPa → 0.101325 MPa.
Variable definitions
- value
From prefix
The “From prefix” field. Default 101.325; typical range 0–1e+24.
- The conversion (to = from × 10^(fromExp − toExp) on pascals. 1 hPa = 100 Pa; 1 kPa = 1,000 Pa.) does not pick US vs UK gallons, SI vs binary megabytes, or Mach at altitude for you. Read the footnote on the page.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Numerically identical. 1013 hPa = 1013 mbar. Bar itself is 10⁵ Pa.
Related calculators
Unit Converters
- Hectopascals to PascalsWeather: 1 hPa = 100 Pa = 1 millibar. Standard sea-level 1013.25 hPa is 101,325 Pa. A 850 hPa pressure surface is 85,000 Pa. METAR “Q1013” is this unit.
- SI Ampere Prefix ConverterLED strings in milliamps, lab picoammeters, and utility kiloamperes share one ampere. A 20 mA loop is 0.02 A. Fuses are labeled in the prefix the catalog bought, not the one your meter displays.
- SI Coulomb Prefix ConverterCharge is current times time, but the unit still prefixes like the others. Battery milliamphours are a different dictionary (1 mAh = 3.6 C). Use this when a spec already wrote coulombs.
- SI Farad Prefix ConverterA one-farad cap is a small brick. Everyday ceramics are picofarads and nanofarads; electrolytics are microfarads. Datasheets hop prefixes without warning. Convert before you order the wrong reel.
- SI Gram Prefix ConverterMass prefixes attach to the gram, not the kilogram. Kilogram is already kilo + gram. Scale yottagram down to yoctogram, or milligram to microgram, without mixing in pounds. Jewelry carats and troy ounces are separate legal pages.
- SI Henry Prefix ConverterPower inductors are millihenrys. RF chokes are microhenrys. A 1 H inductor is an audio-era doorstop. Scale the prefix; this is not an impedance-at-frequency calculator.
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4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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