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.
Governance
Record ff6eebd7b644 • Reviewed by Fidamen Standards Committee
Interactive Converter
Convert between bar and pascal with precision rounding.
Quick reference table
| Bar | Pascal |
|---|---|
| BAR 1.00 bar | 100,000 Pa |
| BAR 5.00 bar | 500,000 Pa |
| BAR 10.00 bar | 1,000,000 Pa |
| BAR 25.00 bar | 2,500,000 Pa |
| BAR 50.00 bar | 5,000,000 Pa |
| BAR 100.00 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).
F.A.Q.
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
- BIPM SI Brochure (9th edition, 2019) — https://www.bipm.org/en/publications/si-brochure
- NIST SP 811 — Guide for the Use of the International System of Units — https://www.nist.gov/pml/special-publication-811
Further resources
Related tools
Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
Record ID: ff6eebd7b644What changed (latest)
v1.0.0 • 2025-11-10 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Public QA status
PASS — golden 25 + edge 120
Last run: 2026-01-23 • Run: golden-edge-2026-01-23
Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
What changed (latest)
v1.0.0 • 2025-11-10 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Public QA status
PASS — golden 25 + edge 120
Last run: 2026-01-23 • Run: golden-edge-2026-01-23
Engine
v1.0.0
Data
Baseline (no external datasets)
Content
v1.0.0
UI
v1.0.0
Governance
Last updated: Nov 10, 2025
Reviewed by: Fidamen Standards Committee (Review board)
Credentials: Internal QA
Risk level: low
Reviewer profile (entity)
Fidamen Standards Committee
Review board
Internal QA
Entity ID: https://fidamen.com/reviewers/fidamen-standards-committee#person
Semantic versioning
- MAJOR: Calculation outputs can change for the same inputs (formula, rounding policy, assumptions).
- MINOR: New features or fields that do not change existing outputs for the same inputs.
- PATCH: Bug fixes, copy edits, or accessibility changes that do not change intended outputs except for previously incorrect cases.
Review protocol
- Verify formulas and unit definitions against primary standards or datasets.
- Run golden-case regression suite and edge-case suite.
- Record reviewer sign-off with credentials and scope.
- Document assumptions, limitations, and jurisdiction applicability.
Assumptions & limitations
- Uses exact unit definitions from the Fidamen conversion library.
- Internal calculations use double precision; display rounding follows the unit's configured decimal places.
- Not a substitute for calibrated instruments in regulated contexts.
- Jurisdiction-specific rules may require official guidance.
Change log
v1.0.0 • 2025-11-10 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Areas: engine, content, ui • Reviewer: Fidamen Standards Committee • Entry ID: 9b52b4bde481