Engineer's Toolkit by bypraba is a free, multidisciplinary engineering encyclopedia created for practicing engineers, students, consultants and field teams worldwide.

FOR ENGINEERS. BY AN ENGINEER.

Access reliable calculations, standards guidance, formulas and practical references across Civil, Electrical, Mechanical, HVAC and Plumbing engineering—all in one focused toolkit.

━━━ WHAT'S INSIDE ━━━

🧮 66 ENGINEERING CALCULATORS
Solve common design and field problems with clear inputs, units, equations and calculated results.

📱 39 PRACTICAL FIELD CALCULATORS
Quick tools for estimates and everyday engineering checks.

📘 40 DESIGN CODE & STANDARD REFERENCES
Structured educational summaries covering important international and regional references, including IS/BIS, IEC, NEC/NFPA, ASHRAE, IPC and related standards.

📐 122 ENGINEERING FORMULAS
Searchable formulas with symbols, units and practical notes. Tap to copy when you need them in reports or calculations.

📏 107 PRACTICAL RULES
Fast checks and field guidance organised by engineering discipline.

🏗️ 34 SYSTEM & ELEMENT GUIDES
Explore common engineering systems and components with types, design steps, applicable rules and failure considerations.

📖 ENGINEERING GLOSSARY
233 technical terms and 135 abbreviations explained in clear language.

📰 NATIVE ENGINEERING ARTICLES
Read articles from bypraba and Lessons to Legacy inside the app. Receive notifications when new articles become available.

━━━ FIVE ENGINEERING WORKSPACES ━━━

🏢 CIVIL ENGINEERING
RCC design, concrete, steel, loads, seismic checks, geotechnical principles, hydraulics, surveying and construction references.

⚡ ELECTRICAL ENGINEERING
Electrical fundamentals, circuits, power, cables, protection, earthing, load assessment and installation references.

⚙️ MECHANICAL ENGINEERING
Torque, shafts, bearings, belt drives, thermal expansion, heat transfer, fluid flow and rotating equipment.

❄️ HVAC ENGINEERING
Cooling and heating loads, airflow, ventilation, psychrometrics, duct systems, chillers, air-handling units and ASHRAE references.

🚰 PLUMBING ENGINEERING
Water supply, drainage, pipe sizing, pumps, fixtures, traps, venting and international plumbing references.

━━━ BUILT FOR REAL ENGINEERING WORK ━━━

✓ Choose a discipline-focused workspace
✓ Search calculators, formulas and references
✓ Save useful content for quick access
✓ Copy formulas and review engineering notes
✓ Core reference content works offline
✓ Clean, fast interface designed for field and office use
✓ No account required
✓ No advertisements or subscription fees

IDEAL FOR:
• Practicing engineers and consultants
• Site engineers, supervisors and project teams
• Engineering students and educators
• Designers, estimators and technical professionals
• Anyone who needs a dependable engineering reference

Engineer's Toolkit is an educational and preliminary-design reference. Always verify calculations and guidance against the complete current edition of the applicable standard, project requirements and local regulations. Critical designs should be reviewed by a qualified professional.

Learn more at bypraba.in