Unit Converter
Convert From Bar to PSI and Vice Versa
Bar ↔ PSI
Type in either bar or psi — it’ll convert to the other automatically!
🔧 What is a Bar?
A bar is a metric unit of pressure, commonly used in **Europe** and **international standards**. It’s defined as 100,000 Pascals, or roughly the pressure of Earth’s atmosphere at sea level. It's widely used in **automotive tire pressure**, **hydraulics**, and **gas systems**.
💨 What is PSI (Pounds per Square Inch)?
PSI is an imperial unit of pressure used mostly in the **United States**. It represents the pressure resulting from a force of one pound-force applied to an area of one square inch. 1 bar = 14.5038 psi.
🧠 Quick Comparison
| Unit | Equivalent | Used In |
|---|---|---|
| 1 bar | 14.5038 psi | Automotive tires, scuba tanks, hydraulics (Europe) |
| 1 psi | 0.0689476 bar | Car tires, HVAC, compressors (USA) |
🧮 How to Convert
Bar to PSI: psi = bar × 14.5038
PSI to Bar: bar = psi × 0.0689476
Example:
2.5 bar × 14.5038 = 36.26 psi
💡 Pro Tip
European car manuals and gas cylinders show pressure in **bars**, while U.S. systems use **PSI**. Always check units when inflating tires or calibrating pressure gauges.
🎉 Did You Know?
Atmospheric pressure at sea level is roughly **1.013 bar** or **14.7 psi** — that’s the pressure you’re under every day without noticing it!
🚘 Real-World Pressure Examples
- 2.0–2.5 bar – Typical car tire pressure
- 200 bar – Pressure inside a SCUBA tank
- 100 psi – High-pressure power washer
- 3,000 psi – Industrial hydraulic systems
📊 Bar to PSI Conversion Chart
| Bar | PSI |
|---|---|
| 1 | 14.50 |
| 2 | 29.01 |
| 2.5 | 36.26 |
| 5 | 72.52 |
| 10 | 145.04 |
| 200 | 2900.76 |
📜 Timeline: Evolution of Pressure Units
- 1600s: Pressure studied using mercury columns (inHg)
- 1850s: PSI used in steam engines and industrial specs
- 1900s: Bar adopted by metric-based systems
- Today: Both bar and psi are widely used depending on region and application
🌐 When to Use Bar vs PSI
- 🛠️ PSI: USA, HVAC, tire shops, compressors, hydraulics
- 🚙 Bar: EU vehicles, scuba gear, industrial specs
- 🧮 Quick Tip: Multiply bar × 14.5 for a fast psi estimate
🎯 Interactive Converter
2.5 bar = 36.26 psi