Pressure Converter
Convert PSI, bar, Pa, atm, mmHg, torr, and inH2O with one general pressure tool. This page also keeps the formula, examples, FAQs, and references close by so you can check the result with confidence.
What This Pressure Converter Helps You Do
1 bar equals 100,000 Pa and 1 psi equals about 6,894.76 Pa. Review the formula and examples below if you want to see how the result is derived.
This page is meant to give you a fast answer, but it also helps you double-check the math before you make a decision. Start with the inputs that you already know, run the calculation, and then compare the output with the formula, examples, and FAQs below so you can see whether the answer fits the situation you are modeling.
If the result looks off, the usual causes are a unit mismatch, a missing decimal, the wrong scenario, or a value that needs to be entered as a rate instead of a total. The notes on this page are designed to make those checks easy without forcing you to leave the calculator and search for context elsewhere.
- Use the calculator first for a quick estimate.
- Use the formula to understand how the result is built.
- Use the examples to compare common use cases.
- Use the references when the answer depends on a standard or assumption.
Common Checks
A quick result is useful, but the best result is one that still makes sense when you look at it a second time. If you are comparing scenarios, try changing one input at a time so you can see which variable has the biggest impact on the final answer. That makes it much easier to spot whether the calculation matches your expectations.
It also helps to keep the context of the problem in mind. A calculator can tell you the math, but you still need to decide whether the input represents a total, a rate, an average, or a category-specific assumption. When in doubt, start with a simple example from the page and scale up from there.
- Check that every unit matches the rest of the problem.
- Keep rates, totals, and averages separate.
- Adjust one variable at a time when testing scenarios.
- Use the smallest realistic input first, then scale upward.
Scenario Planning
This calculator is especially useful when you want a quick answer before you commit time, money, or effort. Try one baseline input set, then change a single number and compare the result so you can see how sensitive the answer is to that variable.
That makes the page useful for more than just arithmetic. It becomes a small decision aid that helps you compare options, test assumptions, and explain the final number with confidence when you need to share it with someone else.
Converted Pressure
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How to Calculate Pressure Converter
- Enter a value: Type the pressure you want to convert.
- Pick the units: Choose the source and target pressure units.
- Read the result: The calculator applies the correct pressure factor immediately.
Pressure Converter Formula
| Variable | Meaning | Unit |
|---|---|---|
| P_from | Starting pressure | Pa, kPa, bar, atm, mmHg, torr, psi, or inH2O |
| P_to | Converted pressure | Pa, kPa, bar, atm, mmHg, torr, psi, or inH2O |
Worked Examples
- Value: 14.7
- From unit: psi
- To unit: kpa
Result: 14.7 psi = 101.35 kPa
Standard atmospheric pressure.
- Value: 1
- From unit: bar
- To unit: psi
Result: 1 bar = 14.5038 psi
A common engineering conversion.
- Value: 1
- From unit: psi
- To unit: inh2o
Result: 1 psi = 27.7076 inH2O
Useful for low-pressure water systems.
Pressure reference
Common checkpoints in pascals.
| Range | Meaning | Action |
|---|---|---|
| < 100 kPa | Below atmospheric scale | Check whether the reading is gauge or absolute pressure. |
| 100-500 kPa | Moderate pressure | Use the converted value directly in your notes. |
| > 500 kPa | High pressure | Keep the unit and factor explicit for safety. |
| Unit | Equivalent in Pa | Note |
|---|---|---|
| 1 kPa | 1000 | Kilopascal |
| 1 bar | 100000 | Exactly 100 kPa |
| 1 atm | 101325 | Standard atmosphere |
| 1 psi | 6894.7573 | Pounds per square inch |
Frequently Asked Questions
References
Last reviewed: March 28, 2026