McLib – Engineering Calculator

McLib – Engineering Calculator for mechanical engineers. Powerful mechanical engineering calculator with ISO tools and AI assistant — all in one app.

Designed for mechanical engineering students, professionals, and educators who need accurate calculators, ISO-standard tools, and reliable engineering data on the go.

Mechanical Engineering Calculator
Solve real-world project calculations instantly:
• Heat loss calculator
• Natural gas installation calculator
• Ventilation calculator
• Pipe diameter calculator
• Circulation pump calculator
• Hydrofor system calculator

Hydraulic Calculator
• Piston and cylinder force calculator
• Pump calculator
• Accumulator calculator
• Pipe flow calculator
• Engine calculator
• Temperature and pressure loss calculator

Pneumatic Calculator
• Air consumption calculator
• Force calculator

Manufacturing & Production Calculator
• Cutting condition calculator (ISO standard)
• Pressure vessel design calculator
• Bearing calculator
• Hardness conversion tool

More Engineering Calculators
• Welding heat input calculator
• Reinforced concrete steel bar calculator
• Tolerance and fits calculator with ISO geometric tolerances
• Bernoulli equation, Young's modulus, differential pressure calculator

Mechanical Engineering Library
• Gearboxes
• Pillow blocks
• Pulleys
• Gears
• Bearings
• Bolts and Nuts
• Fans
• Measuring Tools

Engineering Material Database
• 73 engineering materials
• 15 mechanical and thermal properties per material
• Iron-carbon phase diagram
• Stress-strain diagram

Unit Converter
• 26 unit categories: length, pressure, temperature, power, mass, energy, and more

PDF Export & Calculation History
• Save calculation results as PDF
• View saved calculations anytime

AI Engineering Assistant – Powered by Gemini
• Ask mechanical engineering questions via text
• Upload images of mechanical parts for instant AI analysis
• Multi-turn engineering chat support

McLib is the go-to mechanical engineering calculator with ISO tools and AI assistant — fast, accurate, and built for real engineering work.