Darcy-Weisbach Pipe Flow & Friction Factor Calculator
Calculate pipe head loss, Darcy friction factor (f), Colebrook-White equation, Reynolds number, pressure drop, and pumping power with interactive Moody diagram.
Differential Drive Robot Odometry & Kinematics Calculator
Calculate differential drive mobile robot forward kinematics, inverse kinematics, dead reckoning odometry, instantaneous center of curvature (ICC), and trajectory simulation.
Distillation Column McCabe-Thiele Theoretical Stages Calculator
Calculate theoretical equilibrium stages, minimum reflux ratio (Rmin), optimal feed tray, reboiler boilup, and actual trays using the McCabe-Thiele method.
ECG Heart Rate Variability (HRV) Calculator & Poincaré Plot
Calculate ECG Heart Rate Variability (HRV) time-domain and non-linear metrics including SDNN, RMSSD, pNN50, LF/HF ratio, and interactive Poincaré scatter plot (SD1/SD2).
Electrical Energy Calculator
Calculate electrical energy consumption in kilowatt-hours (kWh) and Megajoules (MJ), daily and monthly electricity bills, and annual operating costs.
Fluid Flow Calculator
Calculate fluid flow rate through pipes and ducts based on diameter and velocity. Computes volumetric flow (L/min, GPM, CFM) and mass flow rate.
Flyback SMPS Transformer Design Calculator
Design isolated flyback SMPS transformers in DCM and CCM modes. Calculate primary inductance, turns ratios, core air gap, peak currents, MOSFET voltage stress, and wire gauges.
Forward & Inverse Kinematics 2D Robotic Arm Calculator
Calculate 2-link planar robotic arm forward and inverse kinematics, Jacobian velocity mapping, kinematic singularities, manipulability, and workspace reachability.
Froth Flotation Recovery, Grade & Kinetics Calculator
Calculate metallurgical recovery, concentrate mass pull, flotation rate constants, cell residence time, and grade-recovery curves using first-order flotation kinetics models.
Gait Analysis & Ground Reaction Force (GRF) Calculator
Calculate biomechanical gait parameters, vertical ground reaction force (GRF) peaks, loading rates, step length, stance/swing timing, and impulse from body mass and velocity.
Gear Train Calculator & Ratio Designer
Calculate gear ratio, output RPM, mechanical advantage, output torque, and rotational direction for simple, compound, and multi-stage gear systems.
Glomerular Filtration Rate (eGFR) & CKD-EPI Calculator
Calculate estimated GFR using the 2021 race-free CKD-EPI equation, Cockcroft-Gault creatinine clearance (CrCl), MDRD formula, and KDIGO chronic kidney disease staging.
Heat Exchanger LMTD & ε-NTU Calculator
Calculate heat exchanger thermal performance, log mean temperature difference (LMTD), effectiveness-NTU, surface area, and heat duty for counter-flow, parallel, and shell-and-tube designs.
Heat Transfer Calculator
Calculate thermal conduction, convection, and radiative heat transfer rates. Fast, free, and secure client-side execution in your browser.
Helical Compression Spring Wahl Stress & Deflection Calculator
Calculate helical compression spring rate k, Wahl curvature factor Kw, shear stress, solid height, clash allowance, buckling stability, and natural surge frequency.
HVAC Airflow CFM & Duct Sizing Calculator
Calculate required HVAC airflow in CFM from sensible heat loads, room ACH turnover, and cooling tons. Size round and rectangular ducts using the Huebscher formula.
Hydraulic Cylinder Calculator
Compute push force, pull force, volume, and speed for single and double-acting cylinders. Fast, free, and secure client-side execution in your browser.
Hydraulic Cylinder Force, Speed, Flow Rate & Power Calculator
Calculate hydraulic cylinder extension and retraction force (tonnage/kN), piston velocity, stroke cycle times, fluid displacement volume, and pump motor horsepower.
Hydraulic Jump Open Channel Flow & Energy Dissipation Calculator
Calculate hydraulic jump sequent depths y2, upstream and downstream Froude numbers, head loss, jump efficiency, and USBR classification for rectangular open channels.
Hydraulic Power Calculator & Cylinder Sizing Tool
Calculate theoretical and actual hydraulic pump power, electric motor requirements, flow rate, pressure drop, cylinder force, and extension speed. Free, instantaneous, zero-dependency browser-based utility.
Hydrocyclone Cut Size (d50c) & Separation Efficiency Calculator
Calculate hydrocyclone cut size d50c, water split ratio, throughput capacity, and Tromp partition curve using Plitt and Lynch-Rao semi-empirical classification models.
Hydrostatic Pressure Calculator
Free hydrostatic pressure calculator. Compute liquid pressure at depth (P = ρgh), gauge and absolute pressure in kPa, PSI, bar, and atmospheres.
Lithium Battery Pack & BMS Calculator
Calculate lithium battery pack configuration (series/parallel), nominal & peak voltages, Wh capacity, internal resistance, voltage sag, thermal Joule losses, C-rates, and BMS safety sizing.
Lithium Battery Pack Sizing, C-Rate & SoC Calculator
Calculate lithium-ion and LiFePO4 battery pack S/P configuration, nominal voltage, C-rate, continuous discharge current, Peukert capacity, and thermal dissipation.
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