Eng Unit Converter is a free online tool that quickly and accurately performs unit conversions needed across various engineering fields including mechanical, civil, electrical, and chemical engineering.
Key Features
- 24 categories with over 100 engineering units
- SI prefix support (k, M, G, etc.) for quick scale conversion
- Expression input support (e.g. 2*pi*50, sqrt(2)*100)
- Significant digits and notation settings (standard/engineering/scientific)
- Clipboard copy functionality
- URL sharing to share results with colleagues
- Mobile-optimized and offline capable (PWA)
Target Users
- Mechanical, civil, electrical, and chemical engineers
- Engineering students (undergraduate and graduate)
- Field technicians and quality control personnel
- Researchers and scientists
Accuracy
All conversion factors are based on official values from NIST (National Institute of Standards and Technology) and international standards organizations. Due to floating-point arithmetic limitations, extremely small errors may occur, but the tool provides sufficient precision for practical use.
Last updated: April 2026