About Moody Chart Calculator

Our Mission

Moody Chart Calculator provides engineers, students, and researchers with a free, accurate, and easy-to-use tool for calculating Darcy friction factors in pipe flow. We believe essential engineering calculations should be accessible to everyone.

What We Offer

Our calculator solves the Colebrook-White equation using Newton-Raphson iteration, providing results accurate to within 0.1% of theoretical values. Features include:

Interactive Moody Chart visualization
Instant friction factor calculations
Support for all flow regimes (laminar, transitional, turbulent)
Comprehensive engineering guides and tutorials
Mobile-friendly interface
Completely free with no registration required

Why We Built This

The Moody Chart is a fundamental tool in fluid mechanics, but manually reading values from a printed chart or solving the Colebrook-White equation by hand is time-consuming and prone to error. We created this calculator to:

Save engineers time on routine calculations
Provide students with an educational resource
Ensure accuracy in critical pipe flow designs
Make engineering knowledge more accessible

Our Approach

We prioritize accuracy, usability, and education. Every calculation is based on established engineering standards including ISO 4006 and the ASHRAE Handbook of Fundamentals. Our blog articles explain the theory behind the calculations, helping users understand not just the "how" but the "why."

Technical Details

The calculator implements the Colebrook-White equation for turbulent flow:

1/√f = -2.0 × log₁₀((ε/D)/3.7 + 2.51/(Re × √f))

For laminar flow (Re < 2300), we use the exact analytical solution: f = 64/Re. The transition zone (2300 ≤ Re < 4000) uses linear interpolation between the two regimes.

Who Uses This Tool

Mechanical Engineers: HVAC system design and pipe sizing
Civil Engineers: Water distribution and municipal systems
Chemical Engineers: Process piping and fluid transport
Petroleum Engineers: Pipeline design and analysis
Students: Learning fluid mechanics and pipe flow
Researchers: Academic studies and publications

Open Source & Transparency

We believe in transparency. Our calculation methodology is fully documented in our blog articles, and we cite all engineering standards and references we use. If you have questions about our calculations or find any issues, please contact us.

Future Development

We're continuously improving the calculator based on user feedback. Planned features include:

Additional pipe flow calculators (pressure drop, flow rate)
More pipe material roughness values
Printable calculation reports
API access for integration
Multi-language support

Contact & Feedback

We welcome your feedback, suggestions, and questions. Whether you've found a bug, have a feature request, or just want to share how you're using the calculator, we'd love to hear from you.

🎯 Our Goal: To provide the most accurate, user-friendly, and educational Moody Chart calculator available online — completely free.