Calculate thermal conduction, convection, and radiative heat transfer rates.

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.

Calculate estimated GFR using the 2021 race-free CKD-EPI equation, Cockcroft-Gault creatinine clearance (CrCl), MDRD formula, and KDIGO chronic kidney disease staging.

Calculate gear ratio, output RPM, mechanical advantage, output torque, and rotational direction for simple, compound, and multi-stage gear systems. Free, instantaneous, zero-dependency browser-based utility.

Calculate biomechanical gait parameters, vertical ground reaction force (GRF) peaks, loading rates, step length, stance/swing timing, and impulse from body mass and velocity.

Calculate metallurgical recovery, concentrate mass pull, flotation rate constants, cell residence time, and grade-recovery curves using first-order flotation kinetics models.

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.

Calculate fluid flow rate through pipes and ducts based on diameter and velocity. Computes volumetric flow (L/min, GPM, CFM) and mass flow rate.

Calculate electrical energy consumption in kilowatt-hours (kWh) and Megajoules (MJ), daily and monthly electricity bills, and annual operating costs.

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).