engineering Calculators
Beam Deflection Calculator
Find the maximum mid-span deflection of a simply supported beam under point, uniform, or triangular loads. Essential for structural engineers verifying serviceability limits and code compliance.
Ohm's Law Calculator
Computes electrical resistance from voltage and current using Ohm's Law. Ideal for electronics hobbyists, students, and engineers sizing resistors or diagnosing circuits.
Pipe Pressure Drop Calculator
Calculates pressure drop along a circular pipe using the Darcy-Weisbach equation. Use it when sizing pumps, designing piping networks, or checking if flow velocities are practical.
Convective Heat Transfer Calculator
Calculates the rate of heat transfer between a surface and a moving fluid using Newton's Law of Cooling. Use it when sizing heat exchangers, cooling fins, or HVAC surfaces where convection is the dominant heat-transfer mode.
Reynolds Number Calculator
Calculates the dimensionless Reynolds number to classify fluid flow as laminar, transitional, or turbulent in a circular pipe. Essential for selecting friction factors and designing pipe systems.
Column Buckling Calculator
Determines the critical axial load at which a slender column will buckle, using Euler's formula. Use it when designing structural columns in buildings, bridges, or machinery frames to ensure safe load-bearing capacity.
Gear Ratio & Speed Calculator
Calculates output speed and output torque for a two-gear system given driver and driven tooth counts, input speed, input torque, and transmission efficiency. Use it when selecting gear pairs for motors, gearboxes, or power-transmission drives.
Stress and Strain Calculator
Converts an applied force and cross-sectional area into mechanical stress in MPa. Use it when evaluating whether a structural member, fastener, or machine component will safely withstand an applied load.
Power Transmission Calculator
Converts torque (N·m) and rotational speed (rpm) into mechanical power in kilowatts. Use it when sizing motors, drives, or shafts, or when checking whether a drivetrain can handle a given load without overheating.
Thermal Expansion Calculator
Calculates how much a material elongates when its temperature changes, using the linear thermal expansion formula. Use it when designing pipework, rail joints, bridge expansion gaps, or any structure subject to temperature fluctuations.
Concrete Mix Design Calculator
Estimates the total cement mass required for a concrete pour based on volume, target strength, cement type, water-cement ratio, and aggregate type. Use it when specifying mix proportions for slabs, columns, or foundations to meet structural and durability requirements.
Pressure Vessel Wall Thickness Calculator
Calculate the minimum required wall thickness of a cylindrical pressure vessel using ASME pressure vessel code equations. Use this during the design phase to ensure safe containment of pressurised fluids or gases.
HVAC Duct Sizing Calculator
Calculate the required diameter or dimensions of HVAC ducts based on air flow rate and design velocity. Use this when designing ventilation systems to balance air delivery with noise and pressure loss constraints.
Transformer Losses Calculator
Calculate the operating efficiency of a power transformer at any load factor, accounting for both iron (no-load) and copper (load-dependent) losses. Use this to compare transformer performance and estimate energy costs.
Pipe Flow Friction Loss Calculator
Calculates pressure drop due to friction in straight pipe runs using the Darcy-Weisbach equation. Use it when sizing pumps, designing piping systems, or troubleshooting flow resistance in water, oil, or gas networks.
Steel Column Buckling Calculator
Computes the Euler critical buckling load for steel columns under axial compression. Essential for structural engineers checking column stability during the design of frames, supports, and load-bearing members.
Heat Exchanger Effectiveness Calculator
Calculates heat exchanger effectiveness using the NTU-effectiveness (ε-NTU) method for counter-flow and parallel-flow configurations. Use it to evaluate or select heat exchangers when outlet temperatures are unknown.
Pump Head Calculator
Determine the total dynamic head and shaft power needed to move fluid through a piping system. Use this when sizing pumps for water supply, irrigation, HVAC, or industrial fluid transfer.
Pipe Flow Pressure Drop Calculator
Calculate the pressure drop along a pipe section using the Darcy-Weisbach equation. Use this when designing water distribution systems, HVAC ductwork, or any piping network where flow resistance must be quantified.
Gear Ratio & Torque Calculator
Compute the output torque, gear ratio, and mechanical advantage of a gear pair given tooth counts, input torque, and efficiency. Use this when designing gearboxes, drivetrains, or any power transmission system.
Thermal Stress & Expansion Calculator
Calculate how much a material expands or the thermal stress it develops when temperature changes, depending on whether it is free to move or constrained. Used in structural engineering, pipeline design, and materials selection.
Ohm's Law & Power Calculator
Instantly compute voltage, current, resistance, or power in any DC circuit by entering two known quantities. Ideal for electronics hobbyists, electricians, and engineering students.
Pipe Flow Rate Calculator
Determine volumetric flow rate through a pipe using the Hazen-Williams equation for water distribution systems. Used by civil and mechanical engineers to size pipes and diagnose pressure loss.
Heat Conduction Calculator
Compute the steady-state heat flow rate through a flat material layer using Fourier's Law. Useful for insulation design, building envelope analysis, and thermal management of electronic components.
Gear Ratio & Speed Calculator
Determine the gear ratio, output shaft speed, and torque multiplication of any meshing gear pair. Use it when designing drivetrains, gearboxes, or motor-to-wheel power transmissions.
Pump Power & Efficiency Calculator
Find the shaft power (kW) needed to drive a pump given flow rate, head, fluid density, and combined pump-motor efficiency. Use it when selecting motors or verifying energy consumption for water supply, HVAC, or process systems.
Pump Power Calculator
Calculate the shaft power a pump must deliver to move fluid against a given head at a specified flow rate and efficiency. Ideal for selecting pumps in water supply, HVAC, and process piping systems.
Pipe Pressure Drop Calculator
Compute the frictional pressure drop along a straight pipe section using the Darcy-Weisbach equation. Essential for pipe sizing, pump selection, and verifying that flow rates are achievable in a piping network.
Reynolds Number Calculator
Determines whether fluid flow inside a pipe is laminar or turbulent by computing the dimensionless Reynolds number. Use it in pipe design, HVAC systems, and chemical process engineering.
HVAC Heat Load Calculator
Estimates the heating or cooling load for a room or building in BTU/hr based on floor area, ceiling height, insulation quality, temperature difference, and window area. Use it to size furnaces, air conditioners, and heat pumps.
Pipe Flow & Pressure Drop Calculator
Calculates pressure drop along a pipe using the Hazen-Williams equation, accounting for pipe material, flow rate, diameter, length, and elevation change. Use it to size water distribution pipes, fire suppression systems, and irrigation lines.
Electrical Wire Sizing Calculator
Determines the minimum wire cross-sectional area needed to keep voltage drop within safe limits for a given load current and run length. Use it when wiring outlets, motors, or solar systems to avoid overheating and energy loss.
Pump Head & Power Calculator
Calculates the brake horsepower a pump motor must deliver to move a fluid at a given flow rate against static head and pipe friction losses. Use it when selecting pumps for irrigation, HVAC, chemical processing, or water supply systems.
Soil Bearing Capacity Calculator
Estimates the allowable load a shallow foundation can safely impose on soil using a simplified Terzaghi bearing capacity approach. Used by geotechnical engineers and structural designers when sizing spread footings or mat foundations.