Convert Standard atmosphere to Kilopascal
1 standard atmosphere = 101.325 kilopascal (kPa). For example, 10 standard atmosphere = 1,013.25 kilopascal and 100 standard atmosphere = 10,132.5 kilopascal. Type any value below to convert standard atmosphere to kilopascal both ways — it runs entirely in your browser.
Quick answer: Standard atmosphere to Kilopascal
1 Standard atmosphere = 101.325 Kilopascal (atm → kPa). To convert standard atmosphere to kilopascal, multiply by 101.325. To convert kilopascal to standard atmosphere, multiply by 0.009869233. 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 standard atmosphere-to-kilopascal questions.
How to convert Standard atmosphere to Kilopascal
To convert standard atmosphere to kilopascal, multiply the number of standard atmosphere by the conversion factor 101.325, because 1 atm = 101.325 kPa. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 kPa = 0.009869233 atm, so you divide by 101.325 (or multiply by 0.009869233) to turn kilopascal back into standard atmosphere.
kPa = atm × 101.325 ·
atm = kPa × 0.009869233
- Write down the value you want to convert, in standard atmosphere.
- Multiply it by 101.325.
- The result is the same area/length/quantity expressed in kilopascal.
Standard atmosphere to Kilopascal — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 standard atmosphere is 506.625 kilopascal because 5 atm × 101.325 = 506.625 kPa.
| Standard atmosphere | Calculation | Kilopascal |
|---|---|---|
| 1 atm | 1 atm × 101.325 = 101.325 kPa | 101.325 kPa |
| 2 atm | 2 atm × 101.325 = 202.65 kPa | 202.65 kPa |
| 3 atm | 3 atm × 101.325 = 303.975 kPa | 303.975 kPa |
| 5 atm | 5 atm × 101.325 = 506.625 kPa | 506.625 kPa |
| 7 atm | 7 atm × 101.325 = 709.275 kPa | 709.275 kPa |
| 10 atm | 10 atm × 101.325 = 1,013.25 kPa | 1,013.25 kPa |
| 12 atm | 12 atm × 101.325 = 1,215.9 kPa | 1,215.9 kPa |
| 15 atm | 15 atm × 101.325 = 1,519.875 kPa | 1,519.875 kPa |
| 20 atm | 20 atm × 101.325 = 2,026.5 kPa | 2,026.5 kPa |
| 25 atm | 25 atm × 101.325 = 2,533.125 kPa | 2,533.125 kPa |
| 50 atm | 50 atm × 101.325 = 5,066.25 kPa | 5,066.25 kPa |
| 100 atm | 100 atm × 101.325 = 10,132.5 kPa | 10,132.5 kPa |
Common Standard atmosphere to Kilopascal conversions
These are the standard atmosphere-to-kilopascal values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 standard atmosphere = 101.325 kilopascal
- 2 standard atmosphere = 202.65 kilopascal
- 2.5 standard atmosphere = 253.3125 kilopascal
- 3 standard atmosphere = 303.975 kilopascal
- 4 standard atmosphere = 405.3 kilopascal
- 5 standard atmosphere = 506.625 kilopascal
- 6 standard atmosphere = 607.95 kilopascal
- 7 standard atmosphere = 709.275 kilopascal
- 8 standard atmosphere = 810.6 kilopascal
- 9 standard atmosphere = 911.925 kilopascal
- 10 standard atmosphere = 1,013.25 kilopascal
- 12 standard atmosphere = 1,215.9 kilopascal
- 15 standard atmosphere = 1,519.875 kilopascal
- 20 standard atmosphere = 2,026.5 kilopascal
- 25 standard atmosphere = 2,533.125 kilopascal
- 30 standard atmosphere = 3,039.75 kilopascal
- 50 standard atmosphere = 5,066.25 kilopascal
- 75 standard atmosphere = 7,599.375 kilopascal
- 100 standard atmosphere = 10,132.5 kilopascal
- 200 standard atmosphere = 20,265 kilopascal
- 500 standard atmosphere = 50,662.5 kilopascal
- 1000 standard atmosphere = 101,325 kilopascal
Standard atmosphere to Kilopascal conversion chart (both directions)
The chart below converts standard atmosphere to kilopascal and kilopascal to standard atmosphere side by side, so it works whichever way you need. 1 standard atmosphere = 101.325 kilopascal, and 1 kilopascal = 0.009869233 standard atmosphere.
| Standard atmosphere → Kilopascal | Kilopascal → Standard atmosphere |
|---|---|
| 0.25 atm = 25.33125 kPa | 0.25 kPa = 0.002467308 atm |
| 0.5 atm = 50.6625 kPa | 0.5 kPa = 0.004934616 atm |
| 1 atm = 101.325 kPa | 1 kPa = 0.009869233 atm |
| 2 atm = 202.65 kPa | 2 kPa = 0.01973847 atm |
| 3 atm = 303.975 kPa | 3 kPa = 0.0296077 atm |
| 4 atm = 405.3 kPa | 4 kPa = 0.03947693 atm |
| 5 atm = 506.625 kPa | 5 kPa = 0.04934616 atm |
| 6 atm = 607.95 kPa | 6 kPa = 0.0592154 atm |
| 7 atm = 709.275 kPa | 7 kPa = 0.06908463 atm |
| 8 atm = 810.6 kPa | 8 kPa = 0.07895386 atm |
| 9 atm = 911.925 kPa | 9 kPa = 0.08882309 atm |
| 10 atm = 1,013.25 kPa | 10 kPa = 0.09869233 atm |
| 12 atm = 1,215.9 kPa | 12 kPa = 0.1184308 atm |
| 15 atm = 1,519.875 kPa | 15 kPa = 0.1480385 atm |
| 20 atm = 2,026.5 kPa | 20 kPa = 0.1973847 atm |
| 25 atm = 2,533.125 kPa | 25 kPa = 0.2467308 atm |
| 30 atm = 3,039.75 kPa | 30 kPa = 0.296077 atm |
| 40 atm = 4,053 kPa | 40 kPa = 0.3947693 atm |
| 50 atm = 5,066.25 kPa | 50 kPa = 0.4934616 atm |
| 75 atm = 7,599.375 kPa | 75 kPa = 0.7401925 atm |
| 100 atm = 10,132.5 kPa | 100 kPa = 0.9869233 atm |
| 150 atm = 15,198.75 kPa | 150 kPa = 1.480385 atm |
| 200 atm = 20,265 kPa | 200 kPa = 1.973847 atm |
| 250 atm = 25,331.25 kPa | 250 kPa = 2.467308 atm |
| 500 atm = 50,662.5 kPa | 500 kPa = 4.934616 atm |
| 1000 atm = 101,325 kPa | 1000 kPa = 9.869233 atm |
Standard atmosphere vs Kilopascal: which is bigger?
A standard atmosphere is the larger unit: one standard atmosphere equals 101.325 kilopascals. Put another way, you need 101.325 kilopascals to make a single standard atmosphere.
What is a Standard atmosphere? History, origin and usage
The standard atmosphere was fixed by the 10th General Conference on Weights and Measures in 1954 at exactly 101,325 pascals. Before that, "one atmosphere" meant whatever a 760 mm mercury column happened to weigh, which depended on local gravity and on the temperature of the mercury — so the same experiment gave slightly different answers in different laboratories. Fixing it as a defined number ended that.
Atmospheres are used in chemistry, physics, diving and any field that talks about pressure as a multiple of ordinary air pressure — reaction conditions, gas laws, hyperbaric medicine and pressure-vessel ratings.
It is a defined constant, not a measurement, so it never changes with the weather or with where you are standing. Real sea-level pressure wanders a few per cent either side of it every week. The deepest point of the ocean sits at roughly 1,100 atmospheres.
What is a Kilopascal? History, origin and usage
The kilopascal came into general use as countries converted their engineering standards to SI through the 1970s and 1980s. Canada, Australia and much of Europe moved tyre-pressure labels and gas-cylinder markings to kPa in that period, which is why a car built for one market often carries a door sticker in kPa and one built for another carries the same number in psi or bar.
Kilopascals are the workaday metric pressure unit: tyre pressures, medical gas supplies, water systems, ventilation and most mechanical engineering specifications. A car tyre is typically inflated to somewhere around 200 to 250 kPa.
One kilopascal is 1,000 pascals, and 100 kilopascals is very nearly one atmosphere — which is a useful mental shortcut, though the exact figure is 101.325 kPa, not 100.
Convert 1 Standard atmosphere to other units
It can help to see a standard atmosphere next to the other units it is commonly compared with. One standard atmosphere (atm) is equal to:
| 1 Standard atmosphere equals | Unit |
|---|---|
| 101,325 Pa | Pascal |
| 1,013.25 hPa | Hectopascal |
| 101.325 kPa | Kilopascal |
| 0.101325 MPa | Megapascal |
| 1,013.25 mbar | Millibar |
| 1.01325 bar | Bar |
| 760 Torr | Torr |
| 759.9999 mmHg | Millimetre of mercury |
| 29.92126 inHg | Inch of mercury |
| 10,332.27 mmH₂O | Millimetre of water |
| 406.7825 inH₂O | Inch of water |
| 14.69595 psi | Pound per square inch |
| 1.033227 kgf/cm² | Kilogram-force per square centimetre |
Convert 1 Kilopascal to other units
One kilopascal (kPa) is equal to:
| 1 Kilopascal equals | Unit |
|---|---|
| 1,000 Pa | Pascal |
| 10 hPa | Hectopascal |
| 0.001 MPa | Megapascal |
| 10 mbar | Millibar |
| 0.01 bar | Bar |
| 0.009869233 atm | Standard atmosphere |
| 7.500617 Torr | Torr |
| 7.500616 mmHg | Millimetre of mercury |
| 0.2952998 inHg | Inch of mercury |
| 101.9716 mmH₂O | Millimetre of water |
| 4.014631 inH₂O | Inch of water |
| 0.1450377 psi | Pound per square inch |
| 0.01019716 kgf/cm² | Kilogram-force per square centimetre |
Tips for converting Standard atmosphere to Kilopascal
- To go from standard atmosphere to kilopascal, multiply by 101.325; to go back, divide by 101.325 (or multiply by 0.009869233).
- For a quick mental estimate, remember that 1 standard atmosphere ≈ 101.325 kilopascal, so 10 standard atmosphere ≈ 1,013.25 kilopascal.
- 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 Standard atmosphere to Kilopascal converter
Type a number into the Standard atmosphere field and the equivalent in Kilopascal 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 Kilopascal field to convert the other way (kilopascal to standard atmosphere). 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 atm = 101.325 kPa), 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 standard atmosphere-to-kilopascal 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 kilopascal are in 1 standard atmosphere?
- 1 standard atmosphere = 101.325 kilopascal (kPa). To convert any number of standard atmosphere to kilopascal, multiply by 101.325.
- How do I convert standard atmosphere to kilopascal?
- Multiply the number of standard atmosphere by 101.325. For example, 10 standard atmosphere = 10 × 101.325 = 1,013.25 kilopascal, and 25 standard atmosphere = 2,533.125 kilopascal.
- How many standard atmosphere are in 1 kilopascal?
- 1 kilopascal = 0.009869233 standard atmosphere. So to convert kilopascal back to standard atmosphere, multiply by 0.009869233.
- What is the formula to convert standard atmosphere to kilopascal?
- kilopascal = standard atmosphere × 101.325. The reverse formula is standard atmosphere = kilopascal × 0.009869233.
- How much is 100 standard atmosphere in kilopascal?
- 100 standard atmosphere = 10,132.5 kilopascal. (And 1000 standard atmosphere = 101,325 kilopascal.)
- Which is bigger, a standard atmosphere or a kilopascal?
- A standard atmosphere is larger: 1 standard atmosphere = 101.325 kilopascal.
- Is this standard atmosphere to kilopascal converter accurate?
- Yes — every value is computed from the exact 101.325 kPa per atm factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert kilopascal to standard atmosphere too?
- Yes. The converter works both ways — enter a value in either field. 1 kilopascal = 0.009869233 standard atmosphere.