12 MPa to psi — 12 megapascals in pounds per square inch
Exact 12 × 145.037738 = 1,740.45
12 megapascals in other units
| Pascals | 12,000,000 | Pa |
|---|---|---|
| Hectopascals | 120,000 | hPa |
| Kilopascals | 12,000 | kPa |
| Millibars | 120,000 | mbar |
| Bar | 120 | bar |
| Standard atmospheres | 118.430792 | atm |
| Pounds per square inch | 1,740.45 | psi |
| Torr | 90,007.4 | Torr |
| Millimetres of mercury | 90,007.39 | mmHg |
| Inches of mercury | 3,543.6 | inHg |
MPa to psi at a glance
| Megapascals | Pounds per square inch |
|---|---|
| 1 MPa | 145.037738 psi |
| 2 MPa | 290.075475 psi |
| 3 MPa | 435.113213 psi |
| 5 MPa | 725.188689 psi |
| 10 MPa | 1,450.38 psi |
| 20 MPa | 2,900.75 psi |
| 25 MPa | 3,625.94 psi |
| 50 MPa | 7,251.89 psi |
| 100 MPa | 14,503.77 psi |
| 250 MPa | 36,259.43 psi |
| 500 MPa | 72,518.87 psi |
| 1,000 MPa | 145,037.74 psi |
How to convert megapascals to pounds per square inch
Multiply by 145.037738 — one megapascal is 145.037738 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 12 × 145.037738 = 1,740.45
In words: about one thousand seven hundred forty pounds per square inch.
Questions
How many pounds per square inch are in a megapascal?
One megapascal is 145.037738 pounds per square inch. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 12 megapascals in pounds per square inch?
12 megapascals is 1,740.45 pounds per square inch. The working is 12 × 145.037738 = 1,740.45.
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.