Hectopascal to Atmosphere (tech) Converter

Pressure Converter

29 units available

Decimals:

From

To

0.00102

1 hPa = 0.00102 at

Formula:

at = hPa × 0.0010197162

With your value: 1 hPa = 0.00101972 at

Other Hectopascal to Atmosphere (tech) conversions

2 hPa to at 3 hPa to at 4 hPa to at 5 hPa to at 6 hPa to at 7 hPa to at 8 hPa to at

Hectopascal to Atmosphere (tech) Conversion Table

Hectopascal (hPa)	Atmosphere (tech) (at)
0.5	0.00051
1	0.00102
2	0.002039
5	0.005099
10	0.010197
15	0.015296
20	0.020394
25	0.025493
50	0.050986
100	0.101972
250	0.254929
500	0.509858
1000	1.019716

Atmosphere (tech) to Hectopascal Conversion Table

Atmosphere (tech) (at)	Hectopascal (hPa)
0.5	490.3325
1	980.665
2	1,961.33
5	4,903.325
10	9,806.65
15	14,709.975
20	19,613.3
25	24,516.625
50	49,033.25
100	98,066.5
250	245,166.25
500	490,332.5
1000	980,665

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Hectopascal (hPa)

Pressure

Exact conversion

Derived from the pascal (1 Pa = 1 N/m²). The standard atmosphere is exactly 101 325 Pa.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Atmosphere (tech) (at)

Pressure

Exact conversion

Derived from the pascal (1 Pa = 1 N/m²). The standard atmosphere is exactly 101 325 Pa.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Hectopascal to Atmosphere (tech)

To convert from Hectopascal (hPa) to Atmosphere (tech) (at), multiply the value by 0.0010197162.

Formula: at = hPa × 0.0010197162

Reverse: hPa = at × 980.665

Step-by-Step Example

Start with your value in Hectopascal. For example: 5 hPa
Multiply by the conversion factor: 5 x 0.0010197162
The result is: 0.005099 at

About Hectopascal

The hectopascal (hPa) is a unit of pressure and stress. One hectopascal equals 100 pascals. UnitConvertLab converts it against every other pressure unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: pressure calculations, engineering and science, education.

About Atmosphere (tech)

The atmosphere (tech) (at) is a unit of pressure and stress. One atmosphere (tech) equals 98066.5 pascals. UnitConvertLab converts it against every other pressure unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: pressure calculations, engineering and science, education.

Frequently Asked Questions

How many Atmosphere (tech) are in 1 Hectopascal?

There are exactly 0.0010197162 Atmosphere (tech) in 1 Hectopascal. This means the conversion factor from Hectopascal to Atmosphere (tech) is 0.0010197162.

What is the formula to convert Hectopascal to Atmosphere (tech)?

The formula to convert Hectopascal to Atmosphere (tech) is: at = hPa × 0.0010197162. For example, to convert 10 Hectopascal to Atmosphere (tech), you would multiply 10 by 0.0010197162.

What is a Hectopascal?