---
title: "Pounds per square inch to Millibars — psi to mbar converter"
description: "1 pound per square inch = 68.94757 millibars. Conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/psi-to-millibars/
site: "At One Place"
---

# Pounds per square inch to millibars

**1 pound per square inch in millibars: 1 psi = 68.94757 mbar**

mbar = psi × 68.94757293

To convert pounds per square inch to millibars, multiply by 68.94757293. The table below gives the values people look up most often, and the converter works for any number.

## Pounds per square inch to millibars table

*Common pound per square inch values converted to millibars.*

| Pounds per square inch | Millibars |
| --- | --- |
| 1 psi | 68.94757 |
| 2 psi | 137.8951 |
| 3 psi | 206.8427 |
| 4 psi | 275.7903 |
| 5 psi | 344.7379 |
| 10 psi | 689.4757 |
| 15 psi | 1,034.2136 |
| 20 psi | 1,378.9515 |
| 25 psi | 1,723.6893 |
| 30 psi | 2,068.4272 |
| 40 psi | 2,757.9029 |
| 50 psi | 3,447.3786 |
| 75 psi | 5,171.068 |
| 100 psi | 6,894.7573 |
| 250 psi | 17,236.893 |
| 500 psi | 34,473.786 |
| 1,000 psi | 68,947.573 |

## How the conversion works

The relationship is mbar = psi × 68.94757293. Both units measure pressure, so the conversion is a fixed factor that never changes.

## Common questions

### How many millibars are in one pound per square inch?

One pound per square inch equals 68.94757 millibars. mbar = psi × 68.94757293.

### How do you convert pounds per square inch to millibars?

Use mbar = psi × 68.94757293. So 10 psi is 689.4757 mbar.

### How many pounds per square inch are in one millibar?

One millibar equals 0.014504 pounds per square inch, which is the reverse of the conversion above.

## Related pages

- [Millibars to Pounds per square inch](https://atoneplace.net/convert/millibars-to-psi/)
- [Pounds per square inch to Pascals](https://atoneplace.net/convert/psi-to-pascals/)
- [Pounds per square inch to Kilopascals](https://atoneplace.net/convert/psi-to-kilopascals/)
- [Pounds per square inch to Bars](https://atoneplace.net/convert/psi-to-bar/)
- [Pounds per square inch to Standard atmospheres](https://atoneplace.net/convert/psi-to-atmospheres/)
- [Pounds per square inch to Torrs](https://atoneplace.net/convert/psi-to-torr/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)