Engineering Calculators
Browse our comprehensive collection of engineering calculators for mechanics, thermodynamics, fluid mechanics, materials, structural, electrical, chemical, and general engineering. Free online tools for engineers, students, and professionals.
Beam Deflection Calculator
Calculate deflection, bending stress, and shear force for beams with various supports and loads.
mechanicsMoment of Inertia Calculator
Compute area moment of inertia, polar moment, and section modulus for common cross-sections.
mechanicsStress & Strain Calculator
Calculate normal stress, shear stress, strain, and safety factor for mechanical components.
mechanicsTruss Analysis (Method of Joints)
Solve truss member forces using method of joints with step-by-step work.
mechanicsShear & Moment Diagrams
Generate shear force and bending moment diagrams for beams under various loads.
mechanicsColumn Buckling (Euler)
Calculate critical buckling load for columns with different end conditions.
mechanicsResultant Force & Moment
Find resultant force, moment, and location for concurrent force systems.
mechanicsCentroid & Center of Gravity
Compute centroid and center of gravity for composite shapes and assemblies.
mechanicsIdeal Gas Law Calculator
Solve for pressure, volume, temperature, or moles using PV = nRT.
thermodynamicsHeat Engine Efficiency
Calculate thermal efficiency of Carnot, Otto, Diesel, and Brayton cycles.
thermodynamicsEnthalpy & Entropy Calculator
Compute enthalpy change, entropy change, and Gibbs free energy for processes.
thermodynamicsSteam Tables Lookup
Find saturated and superheated steam properties (T, P, h, s, v).
thermodynamicsRefrigeration Cycle COP
Calculate COP, capacity, and compressor work for vapor-compression cycles.
thermodynamicsGas Power Cycle Analyzer
Analyze Otto, Diesel, and dual cycles with compression ratio and heat addition.
thermodynamicsPsychrometric Calculator
Determine humidity ratio, relative humidity, dew point, and enthalpy of air.
thermodynamicsExergy (Availability) Analysis
Calculate exergy, exergy destruction, and exergetic efficiency for processes.
thermodynamicsBernoulli's Equation Solver
Solve fluid flow problems with pressure, velocity, and elevation using Bernoulli.
fluidsPipe Flow (Darcy-Weisbach)
Calculate pressure drop, head loss, and flow rate in pipes with friction factor.
fluidsPump Head & Power Calculator
Determine pump head, hydraulic power, and motor power for pumping systems.
fluidsReynolds Number Calculator
Compute Reynolds number to determine laminar, transitional, or turbulent flow.
fluidsOrifice Flow Meter
Calculate flow rate through an orifice plate using Bernoulli and discharge coefficient.
fluidsViscosity & Kinematic Viscosity
Convert between dynamic and kinematic viscosity, and estimate viscosity from temperature.
fluidsOpen Channel Flow (Manning)
Solve Manning's equation for flow in open channels with various cross-sections.
fluidsBuoyancy & Flotation
Calculate buoyant force, displaced volume, and stability of floating objects.
fluidsHooke's Law & Elastic Modulus
Calculate stress, strain, elastic modulus, and deformation using Hooke's law.
materialsPoisson's Ratio Calculator
Determine Poisson's ratio from longitudinal and lateral strain measurements.
materialsThermal Expansion Calculator
Compute linear, area, and volumetric thermal expansion for materials.
materialsHardness Conversion (Brinell, Rockwell, Vickers)
Convert between Brinell, Rockwell, Vickers, and Shore hardness scales.
materialsPhase Diagram (Lever Rule)
Determine phase composition and fractions for binary alloy systems.
materialsFatigue Life (S-N Curve)
Estimate fatigue life and endurance limit based on material properties and stress.
materialsCreep Rate Calculator
Calculate creep strain rate using Norton-Bailey or other creep models.
materialsFracture Toughness (KIC)
Calculate stress intensity factor and fracture toughness for crack propagation.
materialsConcrete Column Design
Calculate axial load capacity and reinforcement for reinforced concrete columns.
structuralSteel Beam Design (AISC)
Check flexural and shear capacity of steel beams per AISC standards.
structuralFoundation Bearing Capacity
Calculate ultimate bearing capacity of shallow foundations using Terzaghi or Meyerhof.
structuralRetaining Wall Stability
Check overturning, sliding, and bearing pressure for retaining walls.
structuralTruss Deflection (Virtual Work)
Calculate deflection of truss structures using the virtual work method.
structuralReinforced Concrete Beam
Design and analyze rectangular reinforced concrete beams for flexure and shear.
structuralWind Load Calculator (ASCE)
Estimate wind loads on buildings and structures per ASCE 7 standards.
structuralSeismic Load Analysis
Calculate base shear and seismic forces for buildings using equivalent lateral force method.
structuralOhm's Law & Power Calculator
Calculate voltage, current, resistance, and power using Ohm's law.
electricalVoltage Drop Calculator
Calculate voltage drop in AC/DC circuits with wire sizing and NEC compliance.
electricalWire & Cable Sizing
Determine minimum wire gauge based on ampacity, voltage drop, and temperature.
electricalPower Factor Correction
Calculate required capacitance to improve power factor in AC circuits.
electricalTransformer Sizing (KVA)
Calculate transformer KVA rating from load and voltage requirements.
electricalMotor Starting Current
Estimate inrush current and starting time for induction motors.
electricalShort Circuit Current (Fault)
Calculate available short-circuit current for protective device coordination.
electricalLighting Design (Lumen Method)
Calculate number of luminaires needed using the lumen method for interior lighting.
electricalReactor Volume (CSTR/PFR)
Calculate volume of continuous stirred-tank or plug-flow reactors for given kinetics.
chemicalDistillation Column (McCabe-Thiele)
Determine number of theoretical stages using McCabe-Thiele graphical method.
chemicalHeat Exchanger (LMTD/NTU)
Design and analyze heat exchangers using LMTD and effectiveness-NTU methods.
chemicalPacked Column (Absorption)
Calculate height of packing for gas absorption columns using transfer units.
chemicalReaction Kinetics & Rate Laws
Determine reaction order and rate constant from concentration-time data.
chemicalVapor-Liquid Equilibrium (Raoult's)
Calculate bubble and dew points for ideal mixtures using Raoult's law.
chemicalCompressor Power & Efficiency
Estimate power required for gas compression and isentropic efficiency.
chemicalPiping Pressure Drop (Two-Phase)
Calculate pressure drop in two-phase flow using Lockhart-Martinelli method.
chemicalUnit Converter (Engineering)
Convert between engineering units for length, mass, pressure, energy, and power.
generalEngineering Notation Calculator
Convert between standard decimal, scientific, and engineering notation.
generalMaterial Density & Specific Gravity
Find density and specific gravity of common materials and convert between units.
generalFlow Rate Conversion
Convert flow rates between units (m³/s, L/min, GPM, CFM, etc.).
generalSurface Roughness (Ra, Rz) Converter
Convert between surface roughness parameters (Ra, Rz, RMS).
generalBolt Torque & Preload
Calculate required torque and preload for bolted joints (UNC/UNF threads).
generalWelding Heat Input
Calculate heat input, cooling rate, and HAZ size for welding processes.
generalMachining Speeds & Feeds
Calculate spindle speed and feed rate for turning, milling, and drilling operations.
generalWhat Are Engineering Calculators?
Our Engineering Calculators collection provides a comprehensive suite of tools for solving problems across all major engineering disciplines. Whether you're a mechanical, civil, electrical, chemical, or structural engineer, these calculators deliver accurate results with clear step-by-step explanations.
From mechanics and thermodynamics to fluid mechanics, materials science, structural analysis, electrical circuits, chemical processes, and general engineering conversions, our tools cover the full spectrum of engineering calculations.
How to Use This Directory
- Search: Type a keyword into the search bar to find specific calculators by name or description.
- Filter by Category: Use the dropdown to narrow down to a specific engineering discipline — each option shows the number of tools available.
- Click to Use: Each calculator card links directly to the tool. Click on any card to start your engineering calculation instantly.
- Explore Category Pages: Use the "Explore More Science & Engineering Calculators" section to access dedicated pages for other related topics.
Why Use Our Engineering Calculators?
- Comprehensive Coverage: Covers mechanics, thermodynamics, fluids, materials, structural, electrical, chemical, and general engineering.
- Accurate & Reliable: Uses validated engineering formulas and standards (ASME, AISC, NEC, ASCE, etc.).
- Free & Accessible: No registration, no fees — use any tool instantly on any device.
- Educational: Many tools show the formulas and principles behind the calculations.
- Professional & Student Friendly: Designed for practicing engineers, students, and technicians.
❓ Engineering Calculators FAQ
What types of engineering calculations can I perform?
You can perform calculations in mechanical engineering (beam deflection, stress/strain, trusses), thermodynamics (ideal gas, heat engines, steam tables), fluid mechanics (pipe flow, pumps, Reynolds number), materials science (hardness, fatigue, thermal expansion), structural engineering (concrete/steel design, wind/seismic loads), electrical engineering (Ohm's law, voltage drop, wire sizing), chemical engineering (reactor design, distillation, heat exchangers), and general engineering (unit conversions, bolt torque, machining).
How do I calculate beam deflection?
Use our Beam Deflection Calculator. Enter beam type, support conditions, load type, dimensions, and material properties to get deflection, bending stress, and shear diagrams.
How do I calculate pipe flow pressure drop?
Use our Pipe Flow (Darcy-Weisbach) calculator. Enter pipe diameter, length, flow rate, fluid properties, and the calculator will compute pressure drop and head loss.
How do I determine the required wire size?
Use our Wire & Cable Sizing calculator. Enter current, voltage, distance, and installation conditions to determine the minimum wire gauge per NEC standards.
What is the ideal gas law and how do I use it?
The ideal gas law (PV = nRT) relates pressure, volume, temperature, and moles of gas. Use our Ideal Gas Law Calculator to solve for any variable.
How do I calculate the efficiency of a heat engine?
Use our Heat Engine Efficiency calculator. Enter work output and heat input, or hot and cold reservoir temperatures for Carnot efficiency.
Are these calculators suitable for professional engineering design?
Yes, our calculators use recognized engineering formulas and standards. However, always verify results with professional software and codes for final design.
How often are new engineering calculators added?
We regularly add new calculators based on user requests and emerging engineering needs. If you have a suggestion, please contact us.
Can I use these calculators for exam preparation and coursework?
Absolutely. These calculators are ideal for students to check their work, understand problem-solving steps, and prepare for exams.