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atm to Pascals Conversion

Convert pressure values from atmospheres to Pascals, kilopascals, or megapascals.

Formula shown0 inputs definedUpdated Nov 2025By CalcuTotal TeamFree, no sign-up

Quick Summary

Use this when you need:

Convert lab vacuum readings in atm into Pa or kPa for sensor calibration
Translate weather station reports stated in atm into Pascals for engineering models
Check safety relief setpoints specified in MPa when design documents list atmospheres

You’ll get:Pressure

How this is calculated

Formula:

pressure_target = pressure_source

In plain language:

Atmospheric pressures are anchored to Pascals (1 atm = 101,325 Pa) and scaled into the desired SI unit.

The formula is always visible so you can verify the math and explain your numbers to anyone who asks.

What these terms mean

Pressure

Pressure used in the calculation.

When to use this calculator

Convert lab vacuum readings in atm into Pa or kPa for sensor calibration
Translate weather station reports stated in atm into Pascals for engineering models
Check safety relief setpoints specified in MPa when design documents list atmospheres

Last updated: November 21, 2025

atm to Pascals converter explained

Lab instruments often read in atmospheres while specs and simulations expect Pascals. This calculator converts atm to Pa, kPa, or MPa without manual factors, keeping your pressure data consistent across reports.

How the conversion works

Standard atmosphere is defined as $1\,\text{atm} = 101{,}325\,\text{Pa}$ . Conversions are straight multiplication or division:

P_{\text{Pa}} = P_{\text{atm}} \times 101{,}325

P_{\text{atm}} = \frac{P_{\text{Pa}}}{101{,}325}

Kilopascals and megapascals follow by scaling $\text{Pa}/1{,}000$ and $\text{Pa}/1{,}000{,}000$ .

Units and conversions

Unit	Symbol	Relation
Atmosphere	atm	$1\,\text{atm} = 101{,}325\,\text{Pa}$
Pascal	Pa	base SI pressure
Kilopascal	kPa	$1\,\text{kPa} = 1{,}000\,\text{Pa}$
Megapascal	MPa	$1\,\text{MPa} = 1{,}000{,}000\,\text{Pa}$

Worked examples

Convert elevated lab pressure to Pascals
Given $1.20\,\text{atm}$ :
$P_{\text{Pa}} = 1.20 \times 101{,}325 \approx 121{,}590\,\text{Pa}$
Result: 121,590 Pa.
Convert kPa reading to atmospheres
Given $350\,\text{kPa}$ :
$P_{\text{atm}} = \frac{350{,}000}{101{,}325} \approx 3.45\,\text{atm}$
Result: 3.45 atm.

Tips and pitfalls

Keep track of absolute vs gauge; this tool assumes absolute pressures.
For stresses or material tests, MPa is often clearer; switch to MPa to avoid long Pa numbers.
Round after the final step, not mid-calculation, to avoid setpoint drift.

References and further reading

Frequently Asked Questions

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Calculator info

Version:: v1.0.0
Last reviewed:: Nov 21, 2025
Sensitivity:: low
References:: 1

Last updated: November 21, 2025

atm to Pascals converter explained

How the conversion works

Standard atmosphere is defined as $1\,\text{atm} = 101{,}325\,\text{Pa}$ . Conversions are straight multiplication or division:

P_{\text{Pa}} = P_{\text{atm}} \times 101{,}325

P_{\text{atm}} = \frac{P_{\text{Pa}}}{101{,}325}

Kilopascals and megapascals follow by scaling $\text{Pa}/1{,}000$ and $\text{Pa}/1{,}000{,}000$ .

Units and conversions

Unit	Symbol	Relation
Atmosphere	atm	$1\,\text{atm} = 101{,}325\,\text{Pa}$
Pascal	Pa	base SI pressure
Kilopascal	kPa	$1\,\text{kPa} = 1{,}000\,\text{Pa}$
Megapascal	MPa	$1\,\text{MPa} = 1{,}000{,}000\,\text{Pa}$

Worked examples

Convert elevated lab pressure to Pascals
Given $1.20\,\text{atm}$ :
$P_{\text{Pa}} = 1.20 \times 101{,}325 \approx 121{,}590\,\text{Pa}$
Result: 121,590 Pa.
Convert kPa reading to atmospheres
Given $350\,\text{kPa}$ :
$P_{\text{atm}} = \frac{350{,}000}{101{,}325} \approx 3.45\,\text{atm}$
Result: 3.45 atm.

Tips and pitfalls

Keep track of absolute vs gauge; this tool assumes absolute pressures.
For stresses or material tests, MPa is often clearer; switch to MPa to avoid long Pa numbers.
Round after the final step, not mid-calculation, to avoid setpoint drift.

Quick Summary

Calculator Tool

How this is calculated

What these terms mean

Pressure

When to use this calculator

atm to Pascals converter explained

How the conversion works

Units and conversions

Worked examples

Tips and pitfalls

References and further reading

Frequently Asked Questions

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Calculator info

atm to Pascals converter explained

How the conversion works

Units and conversions

Worked examples

Tips and pitfalls

References and further reading

Frequently Asked Questions

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Barometric Pressure Conversion

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