Structural Analysis
Beam, column, and foundation calculators for load analysis and structural design verification.
Trusted by 50,000+ Engineers & Professionals
Free Engineering Calculators for Professionals
Access 42+ precision engineering calculators covering structural analysis, mechanical design, electrical circuits, HVAC systems, and fluid mechanics. Built by engineers, for engineers.
Why Engineers Trust Us
Industry Standards
Based on AISC, ACI, NEC, and ASHRAE codes
Expert-Verified
Reviewed by licensed Professional Engineers
50,000+ Users
Trusted by engineers worldwide
Always Free
No registration, unlimited calculations
Why Use Our Engineering Calculators?
Whether you're designing structural foundations, sizing electrical conductors, or analyzing fluid systems, our comprehensive suite of engineering calculators provides accurate results based on industry-standard formulas and codes. Each calculator is developed following AISC, ACI, NEC, and ASHRAE guidelines to ensure professional-grade accuracy.
Our tools help engineers, architects, contractors, and students perform complex calculations quickly and reliably. From beam deflection analysis to voltage drop calculations, every tool is designed with practical engineering workflows in mind.
MEP Engineering
Electrical, mechanical, and plumbing calculators for system sizing and code compliance.
Project Estimation
Material quantity and cost estimation tools for accurate project budgeting.
Structural & Civil Engineering Calculators
Foundation design, load analysis, and construction material calculations for safe and efficient structures.
Structural
Beam Calculator
Calculates deflection, bending moment, and shear force for various beam configurations and loading conditions.
Use Calculator StructuralConcrete Calculator
Estimates concrete volume requirements and material quantities for slabs, footings, columns, and walls.
Use Calculator StructuralRebar Calculator
Determines steel reinforcement requirements including bar spacing, lap lengths, and total weight.
Use Calculator StructuralFooting Calculator
Designs foundation footings based on soil bearing capacity, column loads, and structural requirements.
Use Calculator StructuralRetaining Wall Calculator
Analyzes wall stability against overturning, sliding, and bearing capacity failure.
Use Calculator StructuralSlope Calculator
Determines grade percentage, angle of inclination, and rise/run relationships for terrain analysis.
Use Calculator StructuralExcavation Calculator
Estimates earth removal volumes accounting for swell factors and compaction requirements.
Use Calculator StructuralGravel Calculator
Calculates aggregate quantities for driveways, pathways, and drainage applications.
Use Calculator StructuralAsphalt Calculator
Determines hot mix asphalt tonnage requirements for paving projects of various thicknesses.
Use Calculator StructuralSoil Bearing Capacity Calculator
Calculates allowable soil bearing pressure based on soil type and foundation geometry.
Use CalculatorMechanical Engineering Calculators
Power transmission, component sizing, and mechanical system analysis tools.
Mechanical
Bolt Torque Calculator
Determines proper tightening specifications based on bolt size, grade, and friction coefficients.
Use Calculator MechanicalGear Ratio Calculator
Calculates speed and torque relationships in gear train systems.
Use Calculator MechanicalSpring Calculator
Designs compression and extension springs with proper stress and deflection characteristics.
Use Calculator MechanicalPulley Calculator
Analyzes belt drive systems including speed ratios and belt tension requirements.
Use Calculator MechanicalMotor HP Calculator
Determines required motor horsepower for various mechanical applications.
Use Calculator MechanicalTorque Calculator
Calculates rotational force from power and speed relationships.
Use Calculator MechanicalShaft Diameter Calculator
Sizes power transmission shafts based on torque and bending requirements.
Use Calculator MechanicalBearing Load Calculator
Calculates bearing life, dynamic load ratings, and equivalent loads for rolling element bearings.
Use Calculator MechanicalFlywheel Calculator
Calculates rotational inertia, energy storage, and speed fluctuation for flywheel design.
Use CalculatorElectrical Engineering Calculators
Circuit analysis, power calculations, and electrical system design tools.
Electrical
Ohm's Law Calculator
Relates voltage, current, and resistance in electrical circuits with power calculations.
Use Calculator ElectricalPower Calculator
Determines electrical power consumption, energy costs, and efficiency ratings.
Use Calculator ElectricalWire Gauge Calculator
Sizes electrical conductors based on ampacity, voltage drop, and installation conditions.
Use Calculator ElectricalVoltage Drop Calculator
Calculates voltage loss in electrical circuits based on wire length and load current.
Use Calculator ElectricalResistance Calculator
Calculates series and parallel resistance combinations in electrical circuits.
Use Calculator ElectricalCapacitor Calculator
Determines capacitance, reactance, and energy storage for capacitor applications.
Use Calculator ElectricalInductor Calculator
Calculates inductance, reactance, and energy storage for inductor circuits.
Use Calculator ElectricalTransformer Calculator
Determines turns ratios, voltage transformation, and power ratings for transformers.
Use Calculator ElectricalLED Resistor Calculator
Calculates current-limiting resistor values for LED circuits based on supply voltage.
Use Calculator ElectricalBattery Life Calculator
Estimates battery runtime based on capacity and load current with efficiency factors.
Use CalculatorHVAC & Thermodynamics Calculators
Heating, ventilation, and thermal system design calculations.
HVAC
BTU Calculator
Estimates heating and cooling requirements based on room size, insulation, and climate.
Use Calculator HVACDuct Size Calculator
Designs air distribution ductwork based on airflow requirements and velocity limits.
Use Calculator HVACCFM Calculator
Determines airflow rates for ventilation, exhaust, and HVAC system design.
Use Calculator HVACHeat Transfer Calculator
Calculates conduction, convection, and radiation heat transfer rates.
Use Calculator HVACThermal Expansion Calculator
Determines dimensional changes in materials due to temperature variations.
Use CalculatorFluid Mechanics Calculators
Pipe flow analysis, pressure calculations, and hydraulic system design.
Fluid
Pipe Flow Calculator
Analyzes fluid velocity, flow rate, and Reynolds number in piping systems.
Use Calculator FluidPressure Drop Calculator
Calculates friction losses in pipes, fittings, and valves using Darcy-Weisbach equation.
Use Calculator FluidPump Head Calculator
Determines total dynamic head and pump selection criteria for fluid systems.
Use Calculator FluidTank Volume Calculator
Calculates storage capacity for cylindrical, rectangular, and spherical tanks.
Use CalculatorAdditional Engineering Tools
Unit conversions, cost estimation, and general-purpose engineering utilities.
Tools
Unit Conversion Calculator
Converts between metric and imperial units for length, area, volume, and mass.
Use Calculator ToolsMaterial Weight Calculator
Calculates weight of steel, aluminum, concrete, and other engineering materials.
Use Calculator ToolsCost Estimator Calculator
Estimates project costs including materials, labor, and overhead factors.
Use Calculator ToolsLoad Calculator
Calculates dead loads, live loads, and combined loading for structural analysis.
Use CalculatorFrequently Asked Questions
Common questions about our engineering calculation tools
Yes, all 42+ engineering calculators on this page are completely free to use with no registration required. You can perform unlimited calculations for beam analysis, electrical circuits, HVAC sizing, and more without any cost.
Our calculators are developed using industry-standard formulas from AISC (steel design), ACI (concrete design), NEC (electrical code), and ASHRAE (HVAC standards). Results are verified by licensed Professional Engineers. However, always verify critical calculations independently for actual construction projects.
These calculators are designed as preliminary design tools and educational resources. While the formulas are industry-standard, professional engineering work should always be verified by a licensed engineer who can consider site-specific conditions, local codes, and project requirements.
Our calculators cover six major engineering disciplines: Structural (beam, concrete, foundation design), Mechanical (torque, gears, springs), Electrical (Ohm's law, wire sizing, power), HVAC (BTU, duct sizing, airflow), Fluid Mechanics (pipe flow, pressure drop), and general engineering tools (unit conversion, material weights).
No account or registration is required. All calculators are immediately accessible and free to use. Simply select the calculator you need and start entering your values.
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