Electrical & Electronics

Amps To Kilowatts Calculator

Convert electrical current (amps) to power (kilowatts) for DC, AC single phase, and AC three phase circuits with power factor calculations.

Amps To kVA Calculator

Convert electrical current (amps) to apparent power (kilovolt-amperes) for single-phase and three-phase AC circuits with voltage type selection.

Amps To VA Calculator

Convert electrical current (amps) to apparent power (volt-amperes) for single-phase and three-phase AC circuits with line-to-line voltage calculations.

Amps to Volts Calculator

Convert amps to volts using power (watts) or resistance (ohms) with our free online calculator.

Amps To Watts Calculator

Convert electrical current in amperes (A) to power in watts (W) for DC, AC single phase, and AC three phase circuits with power factor calculations.

Electricity Calculator

Calculate electrical power, voltage, current, and resistance using Ohm's law and power formulas for DC and AC circuits.

Battery Life Calculator

Calculate battery life, runtime, and capacity for various devices. Input battery capacity, current draw, and efficiency to get accurate runtime estimates.

Voltage Drop Calculator

Calculate voltage drop in electrical wires based on wire size, material, length, current, and phase type. Free online voltage drop calculator for DC and AC circuits.

Resistor Calculator

Calculate resistor values using color codes, find total resistance in parallel/series circuits, and compute conductor resistance online.

Capacitor Design Calculator

Calculate capacitance, charge, voltage, and stored energy for capacitors using C=Q/V, U=½CV², parallel plate, and cylindrical capacitor formulas.

Capacitors Series Parallel Calculator

Calculate the equivalent capacitance of capacitors connected in series or parallel configurations. Supports multiple capacitors with unit selection (F, mF, µF, nF, pF).

Inductor Calculator

Calculate solenoid and flat spiral air core coil inductance with solve for turns, permeability, area, and coil length using L = μN²A/l and Wheeler formula.

Passive Crossover Calculator

Design passive crossover networks for speaker systems. Computes inductor and capacitor values for 1st to 4th order audio filters.

RC RL Time Constant Calculator

Calculate time constants for RC (resistor-capacitor) and RL (resistor-inductor) circuits online. Free electronics time constant calculator.

Resistance Converter

Convert electrical resistance values between ohms, kilohms, megohms, and milliohms with our free online resistance unit converter.

Soil Resistivity Calculator

Measure soil resistivity using the Wenner four-pin method. Solve for resistivity, electrode spacing, voltage, or current for grounding system design.

Decibel dB Calculator

Calculate power and voltage gain or loss in decibels, convert between dB and linear scale, and analyze signal levels with dBm and dBW conversions.

Impedance Calculator

Calculate the total impedance of RLC series and parallel circuits at any frequency. Get magnitude, phase angle, phasor diagram, resonant frequency, and Q factor instantly.

Karnaugh Map Solver

Minimize Boolean expressions using an interactive 2, 3, or 4 variable Karnaugh Map (K-Map) solver with SOP and POS results.

LED Resistor Calculator

Calculate the correct current-limiting resistor for LED circuits. Supports single and series LEDs, finds nearest E24 standard resistor values, and shows power dissipation.

RMS to Watts Converter

Convert between RMS watts and peak watts for audio equipment using the sine wave power formula.

Reactive Energy Converter

Convert reactive energy between volt-ampere reactive hour, kilovolt-ampere reactive hour, and megavolt-ampere reactive hour.

Solar Panel Calculator

Estimate solar array size, number of panels, and roof area needed based on electricity consumption and location.

Solar Panel Wattage Calculator

Calculate recommended solar panel wattage from annual electricity use, solar hours, and environmental factors.

Battery Charge Time Calculator

Calculate how long it takes to charge any battery based on capacity, charging current, state of charge, and battery type.

Appliance Depreciation Calculator

Calculate the actual cash value of your home appliances with our free depreciation calculator. Supports 30+ appliance types with preset rates.

Appliance Wattage Calculator

Estimate your household electricity consumption and cost. Add multiple appliances with wattage, quantity, and runtime to calculate daily and monthly energy usage.

Electricity Cost Calculator

Calculate your electricity costs based on power consumption, energy price, and usage time. Free online electricity cost calculator with daily and annual estimates.

Electricity Cost Single Usage

Calculate the cost of running a single electrical appliance for one usage session. Free online single-use electricity cost calculator.

Generator Wattage Calculator

Calculate the total wattage your generator needs to power your appliances. Enter rated and surge watts for each device to determine the right generator size.

Headphone Power Calculator

Calculate power, voltage, and current needed to drive your headphones. Find out if you need a headphone amplifier based on impedance and sensitivity.

LED Savings Calculator

Compare LED and traditional bulb costs including electricity and replacements. See total savings and break-even point instantly.

Lighting Calculator

Calculate required lumens and number of light bulbs for any room based on area, illumination level, and bulb type.

Microwave Wattage Converter

Convert microwave cooking times between different wattages using label power and your microwave settings.

Recessed Lighting Calculator

Calculate optimal recessed lighting spacing and placement for any room. Plan your ceiling lighting layout with rows, columns, and center fixtures.