Pressure and Stress | The Units and Constants Handbook at KnowledgeDoor

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	Pressure and Stress
	Pressure and Stress

Characteristic		atmosphere		Notes
Characteristic		atmosphere		Notes
Symbol	atm
Other Names	standard-atmosphere, atmos, A-n
Metric (SI) Equivalent	101.325 kilo pascals			This equivalent and the others below are exact.
Other Metric (SI) Equivalents with More Basic Units	101.325 kilo newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	1.01325×105 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Unit Group	atmosphere Group

Characteristic		atmosphere-technical		Notes
Characteristic		atmosphere-technical		Notes
Symbol	at
Metric (SI) Equivalent	98.0665 kilo pascals			This equivalent and the others below are exact.
Other Metric (SI) Equivalents with More Basic Units	98.0665 kilo newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	98066.5 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Unit Group	atmosphere Group

Characteristic		bar		Notes
Characteristic		bar		Notes
Metric (SI) Equivalent	100 kilo pascals			This equivalent and the others below are exact.
Other Metric (SI) Equivalents with More Basic Units	100 kilo newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	100000 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2

Characteristic		barad		Notes
Characteristic		barad		Notes
Symbol	ba
Other Names	barye, barrie, bary, baryd, baryed, barie
Metric (SI) Equivalent	0.1 pascals			This equivalent and the others below are exact.
Other Metric (SI) Equivalents with More Basic Units	0.1 newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	0.1 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2

Characteristic		foot-of-mercury-conventional		Notes
Characteristic		foot-of-mercury-conventional		Notes
Other Name	ftHg-conventional
Metric (SI) Equivalent	40.63666 kilo pascals
Other Metric (SI) Equivalents with More Basic Units	40.63666 kilo newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	40636.66 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Unit Group	height-of-mercury Group

Characteristic		foot-of-water ( At 39.2 °F (4 °C) )		Notes
Characteristic		foot-of-water ( At 39.2 °F (4 °C) )		Notes
Other Name	ftH2O
Metric (SI) Equivalent	2.98898 kilo pascals
Other Metric (SI) Equivalents with More Basic Units	2.98898 kilo newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	2988.98 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Unit Group	height-of-water Group

Characteristic		foot-of-water-conventional		Notes
Characteristic		foot-of-water-conventional		Notes
Other Name	ftH2O-conventional
Metric (SI) Equivalent	2.989067 kilo pascals
Other Metric (SI) Equivalents with More Basic Units	2.989067 kilo newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	2989.067 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Unit Group	height-of-water Group

Characteristic		inch-of-mercury ( At 0 °C )		Notes
Characteristic		inch-of-mercury ( At 0 °C )		Notes
Other Name	inHg
Metric (SI) Equivalent	3.38638 kilo pascals
Other Metric (SI) Equivalents with More Basic Units	3.38638 kilo newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	3386.38 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Unit Group	height-of-mercury Group

Characteristic		inch-of-mercury-60 ( At 60 °F )		Notes
Characteristic		inch-of-mercury-60 ( At 60 °F )		Notes
Other Name	inHg-60
Metric (SI) Equivalent	3.37685 kilo pascals
Other Metric (SI) Equivalents with More Basic Units	3.37685 kilo newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	3376.85 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Unit Group	height-of-mercury Group

Characteristic		inch-of-mercury-conventional		Notes
Characteristic		inch-of-mercury-conventional		Notes
Other Name	inHg-conventional
Metric (SI) Equivalent	3.386389 kilo pascals
Other Metric (SI) Equivalents with More Basic Units	3.386389 kilo newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	3386.389 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Unit Group	height-of-mercury Group

Characteristic		inch-of-water ( At 39.2 °F (4 °C) )		Notes
Characteristic		inch-of-water ( At 39.2 °F (4 °C) )		Notes
Other Name	inH2O
Metric (SI) Equivalent	249.082 pascals
Other Metric (SI) Equivalents with More Basic Units	249.082 newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	249.082 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Unit Group	height-of-water Group

Characteristic		inch-of-water-60 ( At 60 °F )		Notes
Characteristic		inch-of-water-60 ( At 60 °F )		Notes
Other Name	inH2O-60
Metric (SI) Equivalent	248.84 pascals
Other Metric (SI) Equivalents with More Basic Units	248.84 newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	248.84 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Unit Group	height-of-water Group

Characteristic		inch-of-water-conventional		Notes
Characteristic		inch-of-water-conventional		Notes
Other Names	inH2O-conventional, inch-of-water-UK			"UK" indicates that this unit is used in the United Kingdom.
Metric (SI) Equivalent	249.08891 pascals
Other Metric (SI) Equivalents with More Basic Units	249.08891 newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	249.08891 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Unit Group	height-of-water Group

Characteristic		kip-per-square-inch		Notes
Characteristic		kip-per-square-inch		Notes
Symbol	ksi
Metric (SI) Equivalent	6.8947572932 mega pascals			This equivalent and the others below are calculated from exact values.
Other Metric (SI) Equivalents with More Basic Units	6.8947572932 mega newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	6.8947572932×106 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Description in Terms of Other Units and Constants	kip-force / inch2

Characteristic		meter-of-mercury ( At 0 °C )		Notes
Characteristic		meter-of-mercury ( At 0 °C )		Notes
Other Name	mHg
Metric (SI) Equivalent	133.322 kilo pascals
Other Metric (SI) Equivalents with More Basic Units	133.322 kilo newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	1.33322×105 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Unit Group	height-of-mercury Group

Characteristic		meter-of-mercury-conventional		Notes
Characteristic		meter-of-mercury-conventional		Notes
Other Name	mHg-conventional
Metric (SI) Equivalent	133.3224 kilo pascals
Other Metric (SI) Equivalents with More Basic Units	133.3224 kilo newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	1.333224×105 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Unit Group	height-of-mercury Group

Characteristic		meter-of-water ( At 4 °C )		Notes
Characteristic		meter-of-water ( At 4 °C )		Notes
Other Name	mH2O
Metric (SI) Equivalent	9.80638 kilo pascals
Other Metric (SI) Equivalents with More Basic Units	9.80638 kilo newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	9806.38 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Unit Group	height-of-water Group

Characteristic		meter-of-water-conventional		Notes
Characteristic		meter-of-water-conventional		Notes
Other Name	mH2O-conventional
Metric (SI) Equivalent	9.80665 kilo pascals			This equivalent and the others below are exact.
Other Metric (SI) Equivalents with More Basic Units	9.80665 kilo newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	9806.65 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Unit Group	height-of-water Group

Characteristic		pascal		Notes
Characteristic		pascal		Notes
Symbol	Pa
Metric (SI) Equivalent	pascal is a metric unit (in fact, it is a derived SI unit)
Other Metric (SI) Equivalents with More Basic Units	1 newton / meter2
Other Metric (SI) Equivalents with More Basic Units	1 kilogram / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2

Characteristic		pieze		Notes
Characteristic		pieze		Notes
Symbol	pz
Metric (SI) Equivalent	1 kilo pascal			This equivalent and the others below are exact.
Other Metric (SI) Equivalents with More Basic Units	1 kilo newton / meter2
Other Metric (SI) Equivalents with More Basic Units	1000 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2

Characteristic		pound-per-square-inch		Notes
Characteristic		pound-per-square-inch		Notes
Symbol	psi
Metric (SI) Equivalent	6.8947572932 kilo pascals			This equivalent and the others below are calculated from exact values.
Other Metric (SI) Equivalents with More Basic Units	6.8947572932 kilo newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	6894.7572932 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2
Description in Terms of Other Units and Constants	pound-force / inch2

Characteristic		torr		Notes
Characteristic		torr		Notes
Other Name	tor
Metric (SI) Equivalent	133.32236842 pascals
Other Metric (SI) Equivalents with More Basic Units	133.32236842 newtons / meter2
Other Metric (SI) Equivalents with More Basic Units	133.32236842 kilograms / meter second2
Metric (SI) Dimensions	length-1 × mass × time-2

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