Physics & Mechanical Calculators

Analyze the physical world with our collection of physics and mechanical engineering calculators. These tools are designed for students and professionals to solve problems related to mechanics of materials, fluid dynamics, thermodynamics, and machine design.

For Educational Use: The results from these calculators are based on idealized models and standard formulas. Always verify critical calculations and designs against relevant codes, standards, and real-world testing. Consult a licensed engineer for professional applications.

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Moment of Inertia Calculator

Calculate the area moment of inertia for various common shapes like rectangles, circles, and triangles.

Principal Stress Calculator

Find the principal stresses and maximum shear stress for a 2D state of stress using Mohr's circle principles.

Heat Input Calculator

For welding applications: calculate the heat input in kJ/mm or kJ/in based on voltage, current, and travel speed.

Pump Head Calculator

Determine the total head required for a pump based on elevation, pressure, and friction losses.

2-Stage Planetary Gearbox Ratio Calculator

Calculate the total gear ratio for a two-stage planetary gearbox based on sun and ring gear teeth counts.