How do you convert atmospheres to kilopascals?

To convert atmospheres (atm) to kilopascals (kPa), multiply the pressure in atmospheres by 101.325 (kilopascals = atmospheres × 101.325).

What is 5 atmospheres in kilopascals?

5 atmospheres (5 atm) is equal to 506.625 kilopascals (506.625 kPa).

Which is larger, 1 standard atmosphere (atm) or 1 kilopascal (kPa)?

One standard atmosphere (atm) is larger than one kilopascal (kPa). Specifically, 1 atm contains 101.325 kPa, whereas 1 kPa is 0.00986923 atm.

How do I convert back from kilopascals (kPa) to atmospheres (atm)?

To reverse the calculation from kPa to atm, multiply your kilopascal value by the inverse factor 0.00986923 (or divide by 101.325). You can also click the Swap button in the tool above to flip directions in one click.

How many decimal places should I round atm to kPa results to?

For everyday comparisons and quick estimates, rounding to 2 decimal places is usually sufficient (for example, 5 atm ≈ 506.63 kPa). For engineering, laboratory, or machining specifications, select 4 or 6 decimals—or Scientific (10ⁿ) mode—in the calculator toolbar above.

Atmospheres to Kilopascals Converter

Enter the pressure in atmospheres below to convert it to kilopascals.

Kilopascals to Atmospheres (kPa → atm)

Convert Atmospheres to Kilopascals

Enter a value in atmospheres (atm) to convert to kilopascals (kPa).

Value (atm)

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Result

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506.625kilopascals

5 atm = 506.625 kPa

Result updates automatically

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Equivalent Measurements Across UnitsFor 5 atm

Pascals506,625 Pa

Kilopascals506.625 kPa

Bars5.06625 bar

PSI73.47974 psi

Suggested Conversions

Reference:NIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))

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Standard Atmosphere to Kilopascal Conversion Table

Table showing various standard atmosphere measurements converted to kilopascals. Click any preset value or arrow to load it into the converter.

Atmospheres (atm)	Kilopascals (kPa)
1 atm	101.325 kPa
2 atm	202.65 kPa
2.5 atm	253.3125 kPa
5 atm	506.625 kPa
10 atm	1,013.25 kPa
15 atm	1,519.875 kPa
20 atm	2,026.5 kPa
25 atm	2,533.125 kPa
30 atm	3,039.75 kPa
50 atm	5,066.25 kPa

How to Convert Atmospheres to Kilopascals

To convert atmospheres to kilopascals, multiply the pressure by the following conversion ratio: 101.325 kilopascals/standard atmosphere.

Since one standard atmosphere is equal to 101.325 kilopascals, you can use this simple formula to convert:

kilopascals = atmospheres × 101.325

The pressure in kilopascals is equal to the pressure in atmospheres multiplied by 101.325.

For example, here's how to convert 5 atmospheres to kilopascals using the formula above.

kilopascals = (5 atm × 101.325) = 506.625 kPa

How Many Kilopascals Are in a Standard Atmosphere?

There are 101.325 kilopascals in a standard atmosphere, which is why we use this value in the formula above.

1 atm = 101.325 kPa|1 kPa = 0.0098692 atm

Our standard atmosphere to kilopascal calculator automatically converts your pressure measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.

Atmospheres and kilopascals are both units used to measure pressure. Keep reading to learn more about each unit.

What Is a Standard Atmosphere?

A standard atmosphere is a unit of pressure equal to 101,325 pascals (Pa), the base unit for pressure. Standard sea-level atmospheric pressure defined as 101,325 Pascals. [1]

The standard atmosphere is classified as a standard unit of pressure. Atmospheres can be abbreviated as atm; for example, 1 standard atmosphere can be written as 1 atm.

When working with atmospheres (atm) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.

In practice, atmospheres (atm) are widely used across large-scale industrial, bulk, and macro-level pressure specifications within international standard workflows, engineering documentation, and technical data sheets.

Learn more about atmospheres in our Pressure Converter.

What Is a Kilopascal?

A kilopascal is a unit of pressure equal to 1,000 pascals (Pa), the base unit for pressure. Equal to 1,000 Pascals (1 kN/m²). [2]

The kilopascal is classified as a metric and SI-compatible unit of pressure. Kilopascals can be abbreviated as kPa; for example, 1 kilopascal can be written as 1 kPa.

In the metric system, "kilo" is the standard SI prefix for thousands, or 10³. This makes the kilopascal (kPa) a convenient decimal multiple of the pascal (Pa).

In practice, kilopascals (kPa) are widely used across large-scale industrial, bulk, and macro-level pressure specifications within SI metric workflows, engineering documentation, and technical data sheets.

Learn more about kilopascals in our Pressure Converter.

When converting pressure between atmospheres (atm) and kilopascals (kPa), keep full floating-point precision (1 atm = 101.325 kPa; 1 kPa = 0.0098692 atm) during intermediate calculations and round only the final kilopascal figure to match your instrument tolerance.

More Standard Atmosphere & Kilopascal Conversions

Need to calculate in the opposite direction? Use our kilopascals to atmospheres calculator to switch your starting unit immediately. You can also explore related tools such as converting kilopascals to atmospheres, converting psi to kilopascals, or converting bars to kilopascals.

Convert from Atmospheres

Convert to Kilopascals

Frequently Asked Questions

There are 101.325 kilopascals (kPa) in 1 standard atmosphere (atm). Conversely, 1 kilopascal (kPa) is equal to 0.00986923 atmospheres (atm).

Pressure Converter

Quick Info

Direct Factor: 1 standard atmosphere (atm) equals 101.325 kilopascals (kPa).
Inverse Factor: 1 kilopascal (kPa) equals 0.00986923 atmospheres (atm).
Formula: kilopascals = atmospheres × 101.325.
Verified Precision: Anchored to official NIST SP 811 and ISO/IEC 80000 standards.

Units Comparison

Standard Atmosphere (atm)

Standard sea-level atmospheric pressure defined as 101,325 Pascals.

Kilopascal (kPa)

Equal to 1,000 Pascals (1 kN/m²).

Pascal (Pa)

SI derived unit of pressure equal to 1 Newton per square meter (N/m²).

References

[1]NIST SP 811 · NIST SP 811 App. B.9 (Pressure & Stress)
Source
[2]NIST CUU · Derived SI Unit: Pascal (Pa)
Source
[3]BIPM · SI Brochure (9th Ed.) — Mechanics
Source

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References

NIST · BIPM · ISO

[1]
NIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))·Pressure Metrology Standard — Atmospheres (atm) to Kilopascals (kPa)
NIST SP 811 Standard
[2]
NIST CUU (Derived SI Unit: Pascal (Pa))·Unit Specifications: Standard Atmosphere (atm) & Kilopascal (kPa)
NIST CUU Specification
[3]
BIPM (SI Brochure (9th Ed.) — Mechanics)·Conversion Factors & Mathematical Basis (atm to kPa)
BIPM Reference

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