Convert Bar to Pascals – Pressure Converter
This tool converts values in bar to pascals (Pa). The pascal is the SI derived unit for pressure; the bar is a widely used metric unit defined exactly as 100000 pascals.
Use this converter for quick, exact conversions when the relationship is the only factor. For measurement work, consider instrument accuracy, calibration status, and the appropriate number of significant figures before reporting results.
Interactive Converter
Convert between bar and pascal with precision rounding.
Quick reference table
| Bar | Pascal |
|---|---|
| 1 bar | 100,000 Pa |
| 5 bar | 500,000 Pa |
| 10 bar | 1,000,000 Pa |
| 25 bar | 2,500,000 Pa |
| 50 bar | 5,000,000 Pa |
| 100 bar | 10,000,000 Pa |
Methodology
The conversion is a fixed, exact multiplicative relationship: 1 bar = 100000 Pa. Because the bar is defined in terms of pascals, no approximation is involved in the multiplicative factor itself.
When applied to measured pressures, the converted numeric value inherits uncertainty from the original measurement instrument and procedure. Follow relevant standards for measurement and reporting (for example, NIST guidance on SI units and ISO standards on quantities and units) and record calibration details when using converted values in regulated or safety-critical contexts.
Worked examples
0.5 bar → 0.5 × 100000 = 50000 Pa.
1 bar → 1 × 100000 = 100000 Pa.
1.01325 bar → 1.01325 × 100000 = 101325 Pa (standard atmospheric pressure).
Further resources
Expert Q&A
Is the conversion factor exact or approximate?
The conversion factor is exact by definition: 1 bar is defined as 100000 pascals. Any remaining uncertainty comes from the measurement device or rounding during presentation.
How many significant figures should I keep after converting?
Keep the number of significant figures consistent with your original measurement uncertainty. If converting a measured value, use the instrument's stated accuracy and calibration certificate to determine appropriate significant figures.
Does this converter consider instrument calibration or measurement uncertainty?
No. This converter performs a mathematical conversion only. For measurement-grade work, record instrument model, calibration date, and uncertainty per relevant standards before using converted values in reporting or compliance.
Can I use this for high-precision engineering calculations?
Yes for the unit conversion itself, since the factor is exact. For high-precision engineering you must also account for the measurement uncertainty, instrument resolution, environmental conditions, and applicable standards (for example, ISO or IEEE standards for sensors and measurement).
How do I convert to related units like kPa, atm, or psi?
Convert bar to pascal first (×100000), then convert pascal to the desired unit using the appropriate factor (for example, 1 kPa = 1000 Pa; 1 atm = 101325 Pa; 1 psi ≈ 6894.757 Pa).
Are there safety or regulatory considerations when converting pressures?
Yes. When conversions feed into safety calculations, equipment ratings, or regulatory compliance, ensure values are traceable to calibrated instruments and follow workplace and industry regulations (for example, OSHA rules and applicable ISO standards).
Sources & citations
- NIST — SI Units and National Standards — https://www.nist.gov/pml/weights-and-measures/si-units
- BIPM — The International System of Units (SI) — https://www.bipm.org/en/measurement-units
- ISO — Quantities and units (ISO 80000 series overview) — https://www.iso.org/standard/35627.html
- IEEE Standards — Sensor and instrumentation standards (reference) — https://standards.ieee.org
- OSHA — Compressed Gases and Pressure Safety Guidance — https://www.osha.gov/compressed-gases