20 mbar to psi — 20 millibars in pounds per square inch
Exact 20 ÷ 68.947573 = 0.29007548
20 millibars in other units
| Pascals | 2,000 | Pa |
|---|---|---|
| Hectopascals | 20 | hPa |
| Kilopascals | 2 | kPa |
| Megapascals | 0.002 | MPa |
| Bar | 0.02 | bar |
| Standard atmospheres | 0.01973847 | atm |
| Pounds per square inch | 0.29007548 | psi |
| Torr | 15.001234 | Torr |
| Millimetres of mercury | 15.001232 | mmHg |
| Inches of mercury | 0.59059967 | inHg |
mbar to psi at a glance
| Millibars | Pounds per square inch |
|---|---|
| 1 mbar | 0.01450377 psi |
| 2 mbar | 0.02900755 psi |
| 3 mbar | 0.04351132 psi |
| 5 mbar | 0.07251887 psi |
| 10 mbar | 0.14503774 psi |
| 20 mbar | 0.29007548 psi |
| 25 mbar | 0.36259434 psi |
| 50 mbar | 0.72518869 psi |
| 100 mbar | 1.450377 psi |
| 250 mbar | 3.625943 psi |
| 500 mbar | 7.251887 psi |
| 1,000 mbar | 14.503774 psi |
How to convert millibars to pounds per square inch
Multiply by 0.01450377 — one millibar is 0.01450377 pounds per square inch. That factor is exact: it comes from the definition of the units rather than from a measurement, so it will not change and does not need rounding.
Working 20 ÷ 68.947573 = 0.29007548
What these units are
The millibar and the pound per square inch are covered in the pressure unit guide, along with every other unit on this page.
Questions
How many pounds per square inch are in a millibar?
One millibar is 0.01450377 pounds per square inch. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 20 millibars in pounds per square inch?
20 millibars is 0.29007548 pounds per square inch. The working is 20 ÷ 68.947573 = 0.29007548.
What pressure should my tyres be?
Look at the sticker in the driver's door frame or the fuel flap, not the number moulded into the tyre — that one is the tyre's maximum, not the manufacturer's recommendation. Most cars sit somewhere around 32 to 35 psi, which is roughly 2.2 to 2.4 bar.
Is my tyre gauge measuring absolute or gauge pressure?
Gauge pressure — the amount above the surrounding air. A tyre reading 32 psi actually contains about 46.7 psi absolute, because atmospheric pressure of roughly 14.7 psi is already pressing on the other side of the gauge. Conversions on this page are between units, and leave that distinction alone.
Why do weather forecasts use hectopascals and millibars interchangeably?
Because they are the same size. One hectopascal is exactly one millibar, so the change from mbar to hPa was a relabelling rather than a conversion. Standard sea-level pressure is 1013.25 of either.
What is the difference between torr and mmHg?
Almost nothing, and the difference is deliberate. A torr is exactly one seven-hundred-and-sixtieth of a standard atmosphere; the conventional mmHg is defined as exactly 133.322387415 pascals. They diverge by about one part in seven million — invisible in medicine, occasionally not in vacuum work.