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)
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.
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.
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. Example: 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.
Example: 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 case: 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.
- Example on the page: 101.325 kPa → 1,013.25 hPa → 0.101325 MPa.
How to Convert SI Pascal Prefix Step-by-Step
- 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.
- 3Worked case: 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.
Example: set From prefix = 101.325, then read the result.
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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