Electronics

Home Network Speed Calculator

Find your recommended internet speed and router specs based on the number of devices and usage types in your home.

Monitor PPI Calculator

Calculate your monitor's pixels per inch (PPI) from screen size and resolution. Find the optimal Retina viewing distance.

Phone Charging Speed Calculator

Estimate how long it takes to charge your phone based on battery capacity and charger wattage.

PWM Duty Cycle Calculator

Calculate PWM duty cycle percentage and frequency from on-time and off-time. Essential for motor control and LED dimming.

Resistors in Series/Parallel Calculator

Calculate total resistance for up to 5 resistors connected in series or parallel. Essential for circuit design.

RF Frequency to Wavelength Calculator

Convert radio frequency to wavelength for antenna design and RF engineering. Supports Hz through GHz and metric/imperial.

TV Viewing Distance Calculator

Find the optimal viewing distance for your TV based on screen size and resolution for the best picture experience.

555 Timer Calculator

Calculate the frequency, period, and duty cycle of a 555 timer IC in astable (oscillator) mode from R1, R2, and C values.

Antenna Length Calculator

Calculate quarter-wave and half-wave antenna lengths from a given frequency. Supports output in meters, centimeters, feet, and inches.

Battery Life Calculator

Estimate how long a battery will last based on its capacity in mAh and the device power consumption in mA.

Cable Voltage Drop Calculator

Calculate voltage drop in electrical cables based on length, current, and wire gauge. Get recommendations for meeting NEC and IEC standards.

Capacitor Charge Time Calculator

Calculate the RC time constant and charge/discharge time for a capacitor and resistor circuit.

Data Transfer Time Calculator

Calculate how long it takes to transfer a file over any connection speed. Enter file size and connection speed to get transfer time.

Ethernet Cable Length Calculator

Calculate how much ethernet cable you need including routing overhead for walls, ceilings, and slack. Avoid buying too little or too much.

Home Power Consumption Calculator

Calculate your home electricity usage and cost. Add appliances with their wattage and daily hours to estimate monthly kWh and electric bill.

Inductor Calculator

Calculate inductor reactance from inductance and frequency, or estimate inductance from coil dimensions. Essential for RF and circuit design.

LED Resistor Calculator

Calculate the correct resistor value for an LED circuit. Enter source voltage, LED forward voltage, and desired current.

PCB Trace Width Calculator

Calculate the recommended PCB trace width based on current, copper thickness, and acceptable temperature rise using IPC-2221.

Power Supply Calculator

Estimate your PC's total power draw by listing components and their wattage, then get a recommended PSU size with headroom.

Resistor Color Code Calculator

Decode resistor color bands to find the resistance value in ohms. Supports both 4-band and 5-band resistors.

Solar Battery Sizing Calculator

Calculate the battery bank capacity needed for your solar system. Enter daily energy usage, days of autonomy, and battery voltage for accurate Ah sizing.

Solar Panel ROI Calculator

Calculate your solar panel return on investment, payback period, and 25-year savings. Factor in system cost, monthly savings, and incentives.

Speaker Wire Gauge Calculator

Find the right speaker wire gauge based on speaker impedance, distance, and power. Avoid signal loss with the correct AWG wire size.

Transformer Calculator

Calculate transformer turns ratio, output current, and input current from voltage and power ratings. Essential for electrical design.

UPS Runtime Calculator

Estimate how long your UPS will keep your equipment running during a power outage. Enter UPS VA rating and total load watts.

Voltage Divider Calculator

Calculate the output voltage of a resistive voltage divider given the input voltage and two resistor values.

Wire Gauge Calculator

Calculate the recommended AWG wire gauge based on current, distance, and acceptable voltage drop. Supports feet and meters.