Why Trust Design Calculators?
We are more than just a tool; we are your partner in precision engineering. We're dedicated to empowering the engineering community with free, reliable, and transparent calculation tools.
Guided by Standards
Our calculations reference the latest IEC, IEEE, and ASME standards, ensuring your results are aligned with industry best practices and global benchmarks.
Transparent Solutions
We provide detailed, step-by-step breakdowns for every calculation. This transparency allows you to understand, verify, and learn from the process.
Deepen Your Knowledge
By seeing every step, you reinforce your conceptual understanding. Our tools are built not just for answers, but for learning and professional growth.
Meticulously Developed
Countless hours of development have been invested to ensure each calculator is robust, accurate, and user-friendly, reflecting a deep commitment to quality.
Our Suite of Engineering Tools
Step into the calculation zone. Choose your discipline to access a powerhouse of industrial-grade calculators for your project and maintenance needs.
Electrical Calculators
Access over 30+ industrial calculators for fault currents, transformer sizing, cable selection, and everything in between for your projects and maintenance.
Press here to go to the Electrical ZoneMechanical Calculators
Engineer with confidence using 30+ calculators for fluid dynamics, stress analysis, and heat transfer, giving you the precision required for robust industrial design.
Press here to go to the Mechanical ZoneInstrumentation Calculators
Calibrate and control with accuracy. Dive into 30+ specialized tools for sensor scaling, valve sizing, and control loop tuning for your process automation.
Press here to go to the Instrumentation ZoneUnlock Your Solution in 3 Simple Steps
Input Your Parameters
Select your calculator and enter your project-specific data into the intuitive interface.
Get Instant Results
Our powerful engine processes your data instantly, providing the final, accurate answer.
Review Every Step
This is our unique value. Expand the detailed breakdown to see the full calculation, from formula to finish.
Guided by Global Standards
Our credibility is rooted in referencing the world's most respected engineering authorities. Our tools are inspired by the methodologies and principles recommended by respected global engineering organizations. We reference widely recognized practices to maintain consistency, reliability, and clarity in every calculation. While our resources draw from established standards, they are intended for informational and educational purposes — helping users understand and apply sound engineering concepts with confidence.
IEC
IEEE
ASME
API
ISA
Technical Papers & Blogs
Stay informed with our in-depth guides and articles. We break down complex topics to help you stay ahead in your field.
ELECTRICAL GUIDE
Understanding Electrical Safety Standards (IEC 60364)
A breakdown of core principles like protective earthing, fault protection, and insulation coordination.
MECHANICAL INSIGHTS
Key Factors in Centrifugal Pump Selection
Learn about head, flow rate, NPSH, and efficiency to choose the right pump for your application.
INSTRUMENTATION TIPS
Sizing Control Valves: A Practical Approach
Explore the importance of the flow coefficient (Cv) and how to avoid common pitfalls like flashing and cavitation.
Trusted by Engineers & Students
Hear from professionals and future leaders who use Design Calculators to enhance their work and studies.
"The step-by-step breakdown for cable sizing is a lifesaver. It saved me hours of manual calculation and helped me double-check my work against IEC standards. An indispensable tool."
"As a mechanical engineer, this site is fantastic for understanding the practical application of engineering formulas. The transparency is unlike any other resource."
"Finally, a reliable online tool for instrumentation calculations! You name any instrumentation calculator - its there. Sizing calculations are accurate and follows ISA standards perfectly. Highly recommended."