HomeCalculatorsPhysicsPSI to Bar Converter
Physics calculator

PSI to Bar Converter

Convert between pound-force per square inch and bar. Runs locally in your browser.

Instant result
Result
—

Enter values to calculate.

Inputs—
Mode—
Formula—
Trust summary CVP VERIFIED · CVP protocol 1.0.0-proposed · Engineering assurance
Input interpretation
Enter values to calculate.
Result
—
Assurance
Engineering
Declared partition coverage
PASS · 2/2 declared partitions (psi-bar, invalid-domain) · Matrix
Known limitations
  • Pressure unit conversion
  • Core CVP does not include live graph, viewport, or pointer interaction.
Model
PSI ↔ bar conversion.
Scope
Positive pressure magnitudes
Verification
Engine tested · Source checked · v1.0.0 · CVP VERIFIED · CVP protocol 1.0.0-proposed · Engineering assurance· View Manifest · CVP overview · Specification
Versions
Calculation 1.0.0 · CVP protocol 1.0.0-proposed
CVP identity
1/1 property · digest 97a1f0bf3704
Legacy regression
4/4 tests · Production surface contract 4/4
Reference
O1 model · O2 expected_values · O2 numerical_behavior
Interfaces
PASS · UI (SSR) / REST / MCP — ui-ssr is query-result HTML, not a live browser session.
Supplemental domain review
Internal · Pass
Named expert review
Not performed
CVP suite
1/1 golden · 1/1 CVP boundary · 1/1 invalid · 1/1 property · 1/1 cross-interface · 1/1 CVP contract · Manifest
Sources
  • SI / customary pressure factors — bar and psi
  • NIST SP 811 / pressure units — bar and psi
Sources
Evidence
2 legacy golden · 1 legacy boundary · legacy regression suite · 1/1 oracle-backed golden · 1/1 invalid · Artifact integrity PASS · CalculatorX electrical review
This calculator CURRENT · Public schema 1.0.0 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓
Semantic contract
PASS
Full verification

Manifest identity, reference classes, interfaces, suite, and production records.

Formulas

Core equations used by this calculator.

psi → barbar = psi / 14.503773773
bar → psipsi = bar · 14.503773773
iExact factor from 1 bar = 10⁵ Pa and 1 psi = 6894.757293168 Pa.

How to use

1

Choose psi → bar or bar → psi

Pick the conversion direction.

2

Enter the pressure value

Value must be finite (typically ≥ 0).

3

Read the converted pressure

bar = psi / 14.503773773.

Example calculations

Common configurations with formula and result.

ϟ

14.503773773 psi

1 bar

÷14.503773773
1 bar

PSI to Bar converter specification

Version 1.0.0 · Engine tested · Supplemental domain review · Internal · 2026-08-09

Calculation status

Review policy · Evidence · Reviewed by CalculatorX electrical review

Definition
1 bar = 14.503773773 psi. Modes convert psi→bar or bar→psi. Pressure must be positive.
What it calculates
PSI ↔ bar conversion.
Inputs
  • mode psi-bar|bar-psi
  • value
Outputs
  • bar or psi number
Formula
bar=psi/14.503773773
Assumptions
  • Positive pressure magnitudes
Units
  • psi, bar
Boundary conditions
  • value≤0 → VALUE_MUST_BE_POSITIVE
Example
14.503773773 psi → 1 bar
Validation cases

1 published on this page · 4/4 tests · Production surface contract 4/4 · View evidence

  • psi-bar value=14.503773773 → 1
Sources
  • SI / customary pressure factors — bar and psi
    Supports: 1 bar = 14.503773773 psi
  • NIST SP 811 / pressure units — bar and psi
    Supports: 1 bar = 14.503773773 psi
Last reviewed
2026-08-09
Reviewed by
CalculatorX electrical review
Calculation version
1.0.0

Background

Interpretation and common distinctions.

Convert PSI ↔ bar.

Supported and not supported

Supported — Bidirectional psi↔bar · API units.pressure.psi_bar

Not supported — atm, torr, gauge→absolute

Agent / API notes

Capability id: units.pressure.psi_bar · tool id: psi-bar · pin 1.0.0.

Other calculators in this family: Ideal Gas, Celsius↔Kelvin .

PV Ideal Gas › K Celsius↔Kelvin ›
}

Frequently asked questions

Key distinctions behind the calculation.

Gauge or absolute?

This tool converts unit magnitude only — it does not add atmospheric offset.