Ele-calc

Ele-calc is the all-in-one electronics toolkit for students, hobbyists, and engineers. Decode components and solve circuits instantly — 100% offline, no account needed.

COMPONENT DECODERS • Resistor Color Code — 4-band and 5-band decoder • Capacitor Code — 3-digit code to pF, nF, µF • Inductor Color Code — Color band to inductance value

CIRCUIT CALCULATORS • Power Calculator — Ohm's Law (V, I, R, P) • Voltage Divider — Vout from Vin, R1, R2 • AC Circuits — Reactance (XL, XC) and resonance frequency • RMS ↔ Peak — RMS, Peak, and Peak-to-Peak converter • dB Calculator — Power and voltage ratios to decibels • Duty Cycle — Frequency and duty cycle to pulse width

NETWORK CALCULATORS • Resistor Network — Series and parallel equivalent • Capacitor Network — Series and parallel equivalent • Inductor Network — Series and parallel equivalent

POWER & ENERGY • Battery Life — Runtime from mAh and load current • MOSFET Power — Conduction and switching loss • Heat Sink — Thermal resistance and junction temperature • 3-Phase Power — Star/Delta, P, Q, S • Power Factor Correction — Capacitor bank sizing • Short Circuit Current — Fault current estimation

SEMICONDUCTOR & DIGITAL • Semiconductor — LED resistor and diode calculations • Digital Electronics — Binary, Octal, Decimal, Hex converter • Scientific Calculator — Math and trig functions

RF & COMMUNICATIONS • Comm & Signal — Frequency to wavelength • LC Matching — L-network impedance matching • VSWR — Reflection coefficient and return loss

EMBEDDED & PCB • PCB Design — Trace width and via current • I2C Pull-up — Bus capacitance and rise time • SPI Clock Divider — Prescaler and effective speed • Timer Interrupt — Preload and overflow frequency

POWER SYSTEMS • Transformer Design — Turns ratio and VA rating • Solar System Sizing — Panels, battery, and inverter • Cable Sizing — For 3-phase motors • Unit Converter — Volts, Power, Frequency, Capacitance

No internet required. No account. Just engineering.