Convert Hectopascal to Pascal
1 hectopascal = 100 pascal (Pa). For example, 10 hectopascal = 1,000 pascal and 100 hectopascal = 10,000 pascal. Type any value below to convert hectopascal to pascal both ways — it runs entirely in your browser.
Quick answer: Hectopascal to Pascal
1 Hectopascal = 100 Pascal (hPa → Pa). To convert hectopascal to pascal, multiply by 100. To convert pascal to hectopascal, multiply by 0.01. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common hectopascal-to-pascal questions.
How to convert Hectopascal to Pascal
To convert hectopascal to pascal, multiply the number of hectopascal by the conversion factor 100, because 1 hPa = 100 Pa. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 Pa = 0.01 hPa, so you divide by 100 (or multiply by 0.01) to turn pascal back into hectopascal.
Pa = hPa × 100 ·
hPa = Pa × 0.01
- Write down the value you want to convert, in hectopascal.
- Multiply it by 100.
- The result is the same area/length/quantity expressed in pascal.
Hectopascal to Pascal — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 hectopascal is 500 pascal because 5 hPa × 100 = 500 Pa.
| Hectopascal | Calculation | Pascal |
|---|---|---|
| 1 hPa | 1 hPa × 100 = 100 Pa | 100 Pa |
| 2 hPa | 2 hPa × 100 = 200 Pa | 200 Pa |
| 3 hPa | 3 hPa × 100 = 300 Pa | 300 Pa |
| 5 hPa | 5 hPa × 100 = 500 Pa | 500 Pa |
| 7 hPa | 7 hPa × 100 = 700 Pa | 700 Pa |
| 10 hPa | 10 hPa × 100 = 1,000 Pa | 1,000 Pa |
| 12 hPa | 12 hPa × 100 = 1,200 Pa | 1,200 Pa |
| 15 hPa | 15 hPa × 100 = 1,500 Pa | 1,500 Pa |
| 20 hPa | 20 hPa × 100 = 2,000 Pa | 2,000 Pa |
| 25 hPa | 25 hPa × 100 = 2,500 Pa | 2,500 Pa |
| 50 hPa | 50 hPa × 100 = 5,000 Pa | 5,000 Pa |
| 100 hPa | 100 hPa × 100 = 10,000 Pa | 10,000 Pa |
Common Hectopascal to Pascal conversions
These are the hectopascal-to-pascal values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 hectopascal = 100 pascal
- 2 hectopascal = 200 pascal
- 2.5 hectopascal = 250 pascal
- 3 hectopascal = 300 pascal
- 4 hectopascal = 400 pascal
- 5 hectopascal = 500 pascal
- 6 hectopascal = 600 pascal
- 7 hectopascal = 700 pascal
- 8 hectopascal = 800 pascal
- 9 hectopascal = 900 pascal
- 10 hectopascal = 1,000 pascal
- 12 hectopascal = 1,200 pascal
- 15 hectopascal = 1,500 pascal
- 20 hectopascal = 2,000 pascal
- 25 hectopascal = 2,500 pascal
- 30 hectopascal = 3,000 pascal
- 50 hectopascal = 5,000 pascal
- 75 hectopascal = 7,500 pascal
- 100 hectopascal = 10,000 pascal
- 200 hectopascal = 20,000 pascal
- 500 hectopascal = 50,000 pascal
- 1000 hectopascal = 100,000 pascal
Hectopascal to Pascal conversion chart (both directions)
The chart below converts hectopascal to pascal and pascal to hectopascal side by side, so it works whichever way you need. 1 hectopascal = 100 pascal, and 1 pascal = 0.01 hectopascal.
| Hectopascal → Pascal | Pascal → Hectopascal |
|---|---|
| 0.25 hPa = 25 Pa | 0.25 Pa = 0.0025 hPa |
| 0.5 hPa = 50 Pa | 0.5 Pa = 0.005 hPa |
| 1 hPa = 100 Pa | 1 Pa = 0.01 hPa |
| 2 hPa = 200 Pa | 2 Pa = 0.02 hPa |
| 3 hPa = 300 Pa | 3 Pa = 0.03 hPa |
| 4 hPa = 400 Pa | 4 Pa = 0.04 hPa |
| 5 hPa = 500 Pa | 5 Pa = 0.05 hPa |
| 6 hPa = 600 Pa | 6 Pa = 0.06 hPa |
| 7 hPa = 700 Pa | 7 Pa = 0.07 hPa |
| 8 hPa = 800 Pa | 8 Pa = 0.08 hPa |
| 9 hPa = 900 Pa | 9 Pa = 0.09 hPa |
| 10 hPa = 1,000 Pa | 10 Pa = 0.1 hPa |
| 12 hPa = 1,200 Pa | 12 Pa = 0.12 hPa |
| 15 hPa = 1,500 Pa | 15 Pa = 0.15 hPa |
| 20 hPa = 2,000 Pa | 20 Pa = 0.2 hPa |
| 25 hPa = 2,500 Pa | 25 Pa = 0.25 hPa |
| 30 hPa = 3,000 Pa | 30 Pa = 0.3 hPa |
| 40 hPa = 4,000 Pa | 40 Pa = 0.4 hPa |
| 50 hPa = 5,000 Pa | 50 Pa = 0.5 hPa |
| 75 hPa = 7,500 Pa | 75 Pa = 0.75 hPa |
| 100 hPa = 10,000 Pa | 100 Pa = 1 hPa |
| 150 hPa = 15,000 Pa | 150 Pa = 1.5 hPa |
| 200 hPa = 20,000 Pa | 200 Pa = 2 hPa |
| 250 hPa = 25,000 Pa | 250 Pa = 2.5 hPa |
| 500 hPa = 50,000 Pa | 500 Pa = 5 hPa |
| 1000 hPa = 100,000 Pa | 1000 Pa = 10 hPa |
Hectopascal vs Pascal: which is bigger?
A hectopascal is the larger unit: one hectopascal equals 100 pascals. Put another way, you need 100 pascals to make a single hectopascal.
What is a Hectopascal? History, origin and usage
The hectopascal was adopted by weather services in the 1980s for a very practical reason: it is exactly the same size as the millibar they had been using since the 1900s. Switching to an SI-based name therefore changed nothing on the charts. A forecast that used to read 1013 mb reads 1013 hPa, digit for digit, so decades of records stayed directly comparable.
Hectopascals are the standard unit for atmospheric pressure in weather reports and aviation across most of the world. Sea-level pressure normally sits between about 980 hPa in a deep storm and 1040 hPa in a strong high-pressure system.
"Hecto" means a hundred, so a hectopascal is 100 pascals. It is one of the very few places where the hecto prefix survives in everyday use — almost everywhere else the SI world jumps straight from the base unit to kilo.
What is a Pascal? History, origin and usage
The pascal is named after Blaise Pascal, who in 1648 had his brother-in-law carry a mercury barometer up the Puy de Dôme in central France and watch the mercury column fall as he climbed. That experiment showed air has weight and that the pressure it exerts drops with height. The unit itself is much younger: the name was adopted by the General Conference on Weights and Measures in 1971, replacing the older habit of writing pressures as "newtons per square metre".
The pascal is the SI unit of pressure and the base every other unit on this page is defined against. On its own it is awkwardly small for daily life — a sheet of paper resting on a table presses down with only a few pascals — so real-world figures are almost always given with a prefix: hectopascals for weather, kilopascals for tyres and gas, megapascals for concrete and hydraulics.
One pascal is one newton spread over one square metre, which is about the pressure of a five-rupee coin lying flat on a table. Because pressure is force divided by area, the same push concentrated into a smaller area gives a much higher pressure — which is why a drawing pin goes into a wall and your thumb does not.
Convert 1 Hectopascal to other units
It can help to see a hectopascal next to the other units it is commonly compared with. One hectopascal (hPa) is equal to:
| 1 Hectopascal equals | Unit |
|---|---|
| 100 Pa | Pascal |
| 0.1 kPa | Kilopascal |
| 0.0001 MPa | Megapascal |
| 1 mbar | Millibar |
| 0.001 bar | Bar |
| 0.0009869233 atm | Standard atmosphere |
| 0.7500617 Torr | Torr |
| 0.7500616 mmHg | Millimetre of mercury |
| 0.02952998 inHg | Inch of mercury |
| 10.19716 mmH₂O | Millimetre of water |
| 0.4014631 inH₂O | Inch of water |
| 0.01450377 psi | Pound per square inch |
| 0.001019716 kgf/cm² | Kilogram-force per square centimetre |
Convert 1 Pascal to other units
One pascal (Pa) is equal to:
| 1 Pascal equals | Unit |
|---|---|
| 0.01 hPa | Hectopascal |
| 0.001 kPa | Kilopascal |
| 0.000001 MPa | Megapascal |
| 0.01 mbar | Millibar |
| 0.00001 bar | Bar |
| 0.000009869233 atm | Standard atmosphere |
| 0.007500617 Torr | Torr |
| 0.007500616 mmHg | Millimetre of mercury |
| 0.0002952998 inHg | Inch of mercury |
| 0.1019716 mmH₂O | Millimetre of water |
| 0.004014631 inH₂O | Inch of water |
| 0.0001450377 psi | Pound per square inch |
| 0.00001019716 kgf/cm² | Kilogram-force per square centimetre |
Tips for converting Hectopascal to Pascal
- To go from hectopascal to pascal, multiply by 100; to go back, divide by 100 (or multiply by 0.01).
- For a quick mental estimate, remember that 1 hectopascal ≈ 100 pascal, so 10 hectopascal ≈ 1,000 pascal.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type — change either side to convert in that direction.
How to use this Hectopascal to Pascal converter
Type a number into the Hectopascal field and the equivalent in Pascal appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Pascal field to convert the other way (pascal to hectopascal). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 hPa = 100 Pa), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for hectopascal-to-pascal conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
Sources
- BIPM — The International System of Units (SI Brochure) — the defining document for the SI, published by the International Bureau of Weights and Measures. It fixes the base unit that this conversion resolves to, which is why the factor here can be exact rather than approximate.
- NIST — Definitions of the SI base units — the US National Institute of Standards and Technology reference for the SI base units, used here as an independent cross-check on the base-unit definition.
Pressure factors here come from fixed definitions, anchored to the pascal: a bar is exactly 100,000 Pa, one atmosphere is exactly 101,325 Pa, a torr is exactly a 760th of an atmosphere, and psi is built from the exact pound and the exact inch. Two of them — psi and the torr — work out to decimals that repeat forever, so where a number is shown rounded it is marked, not quietly trimmed.
Frequently asked questions
- How many pascal are in 1 hectopascal?
- 1 hectopascal = 100 pascal (Pa). To convert any number of hectopascal to pascal, multiply by 100.
- How do I convert hectopascal to pascal?
- Multiply the number of hectopascal by 100. For example, 10 hectopascal = 10 × 100 = 1,000 pascal, and 25 hectopascal = 2,500 pascal.
- How many hectopascal are in 1 pascal?
- 1 pascal = 0.01 hectopascal. So to convert pascal back to hectopascal, multiply by 0.01.
- What is the formula to convert hectopascal to pascal?
- pascal = hectopascal × 100. The reverse formula is hectopascal = pascal × 0.01.
- How much is 100 hectopascal in pascal?
- 100 hectopascal = 10,000 pascal. (And 1000 hectopascal = 100,000 pascal.)
- Which is bigger, a hectopascal or a pascal?
- A hectopascal is larger: 1 hectopascal = 100 pascal.
- Is this hectopascal to pascal converter accurate?
- Yes — every value is computed from the exact 100 Pa per hPa factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert pascal to hectopascal too?
- Yes. The converter works both ways — enter a value in either field. 1 pascal = 0.01 hectopascal.