Kilopascal To Pound Force Per Square Inch Converter

Verified by the ConvertReference Technical Standards Team

ConvertReference Technical Standards Team

All values and formulas are validated through our editorial review process and cross-checked against internationally recognized reference standards (NIST, BIPM, CODATA).

View Editorial Standards & Report Corrections

Last reviewed: December 08, 2025

Conversion Factors

1 kilopascal = 0.145037737730209 pound force per square inch
1 pound force per square inch = 6.89475729316836 kilopascal

(Exact factors: 0.145037737730209 and 6.89475729316836)

Sources: NIST · BIPM

About This Kilopascal And Pound Force Per Square Inch Converter

This quick, user-friendly tool helps you work with common pressure units. Type a value in kilopascals to view the equivalent in pounds-force per square inch. Use the swap button to switch between units. It's fast, clear, and built to help you compare measurements with confidence.

What Are Kilopascals And Pounds Force Per Square Inch?

What Is A Kilopascal?

Kilopascal (kPa) is a unit of pressure in the SI system. It equals 1000 pascals (1 Pa = 1 N/m^2; 1 N = 1 kg·m/s^2), so 1 kPa = 1000 N/m^2. Common symbol: kPa. Real-world example: a typical car tire pressure is about 200 kPa (roughly 29 psi).

What Is A Pound Force Per Square Inch?

Pound-force per square inch (psi) is a pressure unit in the English engineering/US customary system. It is defined as one pound-force on one square inch: 1 psi = 1 lbf / in² (exact). In SI units this equals about 6894.76 Pa. Symbol: psi (lb/in²). Example: car tires run around 30–35 psi.

When To Use Kilopascal Vs Pound Force Per Square Inch

Kilopascal Usage

Kilopascals (kPa) are a common SI unit of pressure used in daily life and various measurements in many countries. Primary users include Canada, Australia, the United Kingdom, and New Zealand.

Pound Force Per Square Inch Usage

Pound-force per square inch (psi) is used in several countries for expressing pressure in everyday measurements. Common in the United States, Canada, the United Kingdom, and Australia, it remains familiar for consumer products and readings where imperial units persist alongside metric units.

How To Convert Between Kilopascals And Pounds Force Per Square Inch

Conversion Formulas

Kilopascal to Pound Force Per Square Inch:
kilopascal × 0.145037737730209 = pound force per square inch

Pound Force Per Square Inch to Kilopascal:
pound force per square inch × 6.89475729316836 = kilopascal

Step-by-Step Guide

Kilopascal to Pound Force Per Square Inch

Take your value in kilopascals.
Multiply by 0.145037737730209.
The result is in pounds force per square inch.

Pound Force Per Square Inch to Kilopascal

Take your value in pounds force per square inch.
Multiply by 6.89475729316836.
The result is in kilopascals.

Example: Convert 2 kilopascals to pounds force per square inch.

Exact: 2 × 0.145037737730209 = 0.290075475460418 pounds force per square inch.
Rounded: approximately 0.290075 pounds force per square inch.

Example: Convert 5 pounds force per square inch to kilopascals.

Exact: 5 × 6.89475729316836 = 34.4737864658418 kilopascals.
Rounded: approximately 34.4738 kilopascals.

History & Context

Kilopascal and pound force per square inch illustrate different threads in the history of pressure measures. The pascal was created with the modern metric system and named after Blaise Pascal; the kilopascal is the metric unit for pressure, common after the SI system spread through science and industry. The pound force per square inch grew in British engineering and US practice, using a traditional force unit and an inch for area, and it remained common in cars, tires, and gas work even as SI gained ground. These units show a shift from older practical systems to a universal scientific language while both arose from daily measurement needs in past centuries.

Practical Use

An engineer testing a hydraulic circuit designed in kilopascals needs to convert kPa to psi to match a supplier's imperial pressure data. A technician reviewing a pressure gasket catalog that lists psi may convert to kilopascals to verify the rating against a metric spec. These conversions help ensure compatibility and safety when parts or procedures use different unit systems.

Common Mistakes When Converting Between Kilopascals And Pounds Force Per Square Inch

Treating kilopascal and psi as the same unit and using them interchangeably.
Applying a direct substitution without applying the proper conversion factor between kilopascals and pounds per square inch.
Assuming gauge pressure and absolute pressure are identical for the conversion between kilopascals and psi.
Confusing a pressure difference with an absolute pressure value when converting between kilopascals and psi.

Mental Shortcuts For Quick Conversions

Tip 1 (kPa → psi): 1 kPa ≈ 0.145 psi (roughly 7 kPa ≈ 1 psi). Tip 2 (psi → kPa): 1 psi ≈ 6.895 kPa (about 7 kPa ≈ 1 psi). For estimation only; use a precise converter when accuracy matters.

Kilopascals And Pounds Force Per Square Inch Conversion Graph

Conversion Table For Kilopascal And Pound Force Per Square Inch

Common conversion values
Kilopascals	Pounds force per square inch
1	0.145038
2	0.290075
5	0.725189
10	1.45038
25	3.62594
50	7.25189
100	14.5038
200	29.0075
500	72.5189

Values are rounded for display; internal calculations use the exact conversion factors between kilopascal and pound force per square inch (0.145037737730209 and 6.89475729316836).

Dataset & API Access

Programmatic Access

Free JSON API with stable endpoints and predictable keys for automated bidirectional conversions.

Endpoint: https://convertreference.org/api/v1/convert/kilopascal-to-pound-force-per-square-inch.json

Content Type: application/json

Documentation: View API docs

Licensing

License: CC0 1.0 Universal (Public Domain)

See all datasets

Data & Editorial Process

All numerical values and formulas are generated from the Pint scientific unit library (v0.25), using constants consistent with the BIPM SI Brochure (9th Edition) and NIST Special Publication 811. Explanatory text is drafted with AI assistance and reviewed by ConvertReference editors for clarity and accuracy. This converter is completely free to use, and all calculations are performed locally in your browser and never sent to a server.

2025-12-08 – Generated: Page created using Pint v0.25 verified constants.
2025-12-08 – Reviewed: Verified by ConvertReference editors; no numerical changes required.

⚠️ Report this page ⬆️ Go to top