Convert Kilopascals to Torr - Pressure Converter

This converter converts a single pressure value expressed in kilopascals (kPa) into torr. The relationship is a fixed mathematical ratio derived from the definition of standard atmosphere (1 atm = 101.325 kPa = 760 torr). Use this tool for quick unit translation, reporting, and data entry.

When using converted values for instrumentation setpoints, vacuum specifications, calibrations, or regulatory records, consider measurement uncertainty, instrument calibration status, and the number of significant figures required by your procedure or applicable standard.

Updated Nov 11, 2025QA PASS — golden 25 / edge 120Run golden-edge-2026-01-23

Governance

Record 04821aef6755 • Reviewed by Fidamen Standards Committee

Interactive Converter

Convert between kilopascal and torr with precision rounding.

Kilopascal (kPa)Torr (Torr)

Quick reference table

Kilopascal	Torr
KPA 1.00 kPa	7.5006 Torr
KPA 5.00 kPa	37.5032 Torr
KPA 10.00 kPa	75.0064 Torr
KPA 25.00 kPa	187.5159 Torr
KPA 50.00 kPa	375.0319 Torr
KPA 100.00 kPa	750.0638 Torr

Methodology

We use the internationally accepted definition that 1 atmosphere equals 101.325 kilopascals and equals 760 torr. From that definition the exact conversion factor for kilopascal to torr is computed as 760 divided by 101.325.

Results shown by this converter are numerical conversions only; they do not account for the measurement uncertainty of the instrument that produced the original kPa value. For compliance or metrology work follow guidance from NIST, ISO, and other applicable standards on calibration intervals and uncertainty reporting.

Worked examples

Convert 1 kPa → 1 × 7.50061683 ≈ 7.5006 torr

Convert 101.325 kPa → 101.325 × 7.50061683 ≈ 760.000 torr (standard atmosphere)

Convert 0.5 kPa → 0.5 × 7.50061683 ≈ 3.7503 torr

F.A.Q.

Is the torr the same as mmHg?

The torr is defined as exactly 1/760 of a standard atmosphere. Millimeters of mercury (mmHg) historically depended on mercury density and gravity; in many practical contexts torr and mmHg are treated as equivalent to within typical measurement uncertainty, but for high-precision work use the defined torr or convert using documented standards.

How many significant figures should I keep?

Keep as many significant figures as justified by your measurement uncertainty and the requirements of your procedure or standard. For display, three to six significant figures is common; for calibration certificates follow the uncertainty and reporting rules in ISO/IEC 17025 and NIST guidance.

Does this conversion account for instrument calibration or uncertainty?

No. This tool performs a purely mathematical unit conversion. It does not include instrument error, calibration uncertainty, or environmental corrections. For traceable results apply the instrument's calibration data and uncertainty budget as described in ISO and NIST metrology guidance.

When should I use torr instead of kPa?

Use torr where vacuum technology, gas-phase research, or legacy specifications require it. Use kPa for SI-compliant reporting and when working with engineering systems that use SI units. Convert as needed for documentation or equipment interfaces.

Is the conversion factor exact?

The relationship 760 torr = 101.325 kPa is the defining basis used here. The derived factor 7.50061683 is a numerical representation used for conversion; treat displayed digits according to required reporting precision and uncertainty.

Sources & citations

NIST - Fundamental Measurement and Units Guidance — https://www.nist.gov
ISO - International Organization for Standardization — https://www.iso.org
IEEE Standards Directory — https://standards.ieee.org
OSHA - Occupational Safety and Health Administration — https://www.osha.gov
ISO 80000-4:2019 — Mechanics — https://www.iso.org/standard/64975.html
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

External guidance

Versioning & Change Control

Audit record (versions, QA runs, reviewer sign-off, and evidence).

Record ID: 04821aef6755

What changed (latest)

v1.0.0 • 2025-11-11 • 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

Governance

Last updated: Nov 11, 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 • 2025-11-11 • 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: 57237e92a86c