Engineering & Technical Tools
100% client-side electrical, mechanical, structural, civil, and chemical engineering calculators: Ohm's law, beam deflection, pipe flow, gear trains, wire sizing, and thermal transfer. All tools run 100% in your browser with zero server uploads and instant processing.
Solar PV System Sizing & Battery Storage Calculator
Calculate solar array capacity (kWp), required roof area, lithium battery storage (kWh & Ah), and carbon offset
Ohm's Law & DC Power Calculator
Solve voltage, current, resistance, and electrical power dissipation in real time
AC Electrical Power Calculator (1-Phase & 3-Phase)
Calculate real power (kW), apparent power (kVA), reactive power (kVAR), and phase angle
Power Factor Correction & Capacitor Sizing
Calculate required kVAR capacitor bank and microfarads (µF) to avoid utility penalties
Electrical Load Schedule & Panel Sizing
Schedule equipment wattage, apply NEC 125% continuous rules, and size service panels
Voltage Drop Calculator & NEC Compliance
Calculate feeder voltage drop, line losses, and verify NEC 3% and 5% compliance
Wire Size & Conductor Ampacity Calculator
Determine minimum copper and aluminum AWG gauge based on NEC Table 310.16
Resistor Color Code & SMD Decoder
Decode 4-band, 5-band, and 6-band color codes, plus 3-digit and 4-digit SMD resistors
Capacitor Reactance & RC Circuit Calculator
Calculate capacitive reactance (Xc), RC time constant (τ), and stored energy in Joules
Inductor Reactance & RL Circuit Calculator
Calculate inductive reactance (XL), RL time constant (τ), and magnetic stored energy
Torque, Shaft Power & Shear Stress Calculator
Calculate torque (T = F · r), rotational power (kW & HP), and shaft torsional shear stress
Gear Ratio & Gear Train Speed Calculator
Calculate single and compound gear reduction, output RPM, torque multiplication, and efficiency
Machining Spindle RPM & Cutting Speed Calculator
Calculate CNC spindle RPM from cutting speed (Vc / SFM) and AC motor synchronous speeds
Mechanical Stress & Yield Safety Factor Calculator
Calculate normal and shear stress (σ = F/A) in MPa and PSI with yield safety factors
Tensile Strain & Poisson Ratio Calculator
Calculate engineering strain (ε = ΔL / L), microstrain (με), and lateral Poisson contraction
Beam Deflection & Bending Stress Calculator
Calculate simply supported & cantilever beam bending moment, midspan sag, and outer fiber stress
Pipe Flow, Head Loss & Pressure Drop Calculator
Calculate Darcy-Weisbach friction head loss, pressure drop (kPa / PSI), and volumetric flow rate
Reynolds Number & Flow Regime Calculator
Calculate Reynolds number (Re) and identify laminar, transitional, or turbulent flow
Fluid Continuity & Torricelli Efflux Calculator
Calculate conservation of mass (A1v1 = A2v2) and Torricelli orifice discharge velocity
Heat Transfer Calculator (Conduction, Convection, Radiation)
Calculate 1D thermal conduction, convective cooling, and Stefan-Boltzmann radiation
Engineering Unit Converter (Pressure, Power, Energy, Viscosity)
Convert pressure, power, energy, and dynamic viscosity across metric and Imperial units
Bill of Materials (BOM) & Hardware Cost Studio
Component cost breakdown, SMT pick & place assembly, NRE tooling amortization & MSRP calculator
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