Electrical Engineering Calculators

Solar Panel Calculator

Designing a renewable energy system requires precision. Our Solar Panel Calculator (Solar System Sizing) helps you determine the exact number of panels and battery capacity needed for your specific load. By inputting your daily energy consumption in kilowatt-hours, this tool calculates the required array size to ensure your off-grid or hybrid system operates efficiently throughout the year, taking into account peak sun hours and system losses.

Voltage Drop Calculator

Voltage drop is a critical factor in cable selection and system safety. This Voltage Drop Calculator allows engineers to compute the percentage of voltage loss over long cable runs. By entering the wire material (Copper or Aluminum), size, length, and load current, you can ensure your design complies with NEC standards (typically less than 3% drop) and prevents equipment failure due to undervoltage issues.

Wire Size Calculator

Selecting the correct cable gauge is essential for preventing overheating and ensuring fire safety. Our Wire Size Calculator (Cable Sizing) determines the optimal wire thickness based on the amperage load and the length of the run. Whether you are wiring a residential circuit or an industrial motor, this tool recommends the standard AWG or metric size that can safely handle the current while minimizing resistance.

Battery Life Calculator

For backup power systems, knowing how long your supply will last is vital. This Battery Life Calculator (UPS / Inverter Backup Time) estimates the runtime of your battery bank based on the total load and battery capacity in Amp-hours. It is an indispensable tool for designing Uninterruptible Power Supplies (UPS) and solar storage systems, ensuring you have enough backup power during outages.

Power Factor Correction

Industrial loads often suffer from poor power efficiency. The Power Factor Correction tool calculates the required capacitor bank size (in kVAR) to improve your system's power factor. By correcting the lag between voltage and current, you can reduce reactive power demand, lower electricity bills, and increase the capacity of your transformers and generators.

Appliance Energy Cost

Understand your energy consumption with the Appliance Energy Cost calculator. This tool helps you estimate the monthly and yearly operating cost of any electrical device. By entering the wattage and daily usage hours, you can analyze your electricity bill and identify high-consumption appliances to improve energy efficiency in your home or facility.

3-Phase Motor Current

Three-phase motors are the backbone of industrial machinery. This calculator allows you to compute the full load current (FLA) for 3-phase motors based on their power rating (HP or kW), voltage, and power factor. It is accurate and essential for sizing motor starters, overload protection, and branch circuit cables.

Transformer and Generator Sizing

Sizing a power source correctly prevents overloading and inefficiency. This tool helps you calculate the required kVA rating for transformers and generators based on your total connected load. Whether you are planning for a standby generator or a main distribution transformer, this calculator ensures your power source can handle the maximum demand with a safety margin.

Short Circuit Current (Isc)

Safety analysis requires knowing the maximum fault current. The Short Circuit Current calculator estimates the potential short circuit current (Isc) at a specific point in the system. This data is crucial for selecting the right circuit breakers and fuses with adequate interrupting ratings to protect equipment and personnel during a fault.

EV Charging Cost

As electric vehicles become more common, calculating charging expenses is necessary. The EV Charging Cost tool determines how much it costs to fully charge an electric vehicle battery based on your local electricity rate per kWh and the battery capacity. It helps EV owners plan their charging schedule and budget effectively.

AC Sizing Calculator

Selecting the right air conditioner is key to comfort and energy savings. The AC Sizing Calculator estimates the required cooling capacity (in BTUs or Tons) based on room dimensions. It ensures you don't buy an undersized unit that struggles to cool, or an oversized unit that wastes energy.

Voltage Calculator

Based on Ohm's Law, this tool isolates Voltage (V) as the variable. By entering the Current (I) and Resistance (R), you can instantly calculate the potential difference across a component. It is a fundamental tool for troubleshooting circuits and verifying voltage levels at different points in a network.

Current Calculator

When you need to know the flow of charge, the Current Calculator is the answer. Use this tool to find the Amperage (I) flowing through a circuit by inputting the Voltage (V) and Resistance (R) or Power (P). It is essential for checking if a load remains within the safe operating limits of a circuit breaker.

Resistance Calculator

Resistance is the opposition to current flow. This calculator helps you determine the Resistance (R) value of a load or resistor using known values of Voltage and Current. It is particularly useful for designing resistor networks and diagnosing damaged components that may have open or short circuits.

Power Calculator

Calculate the rate of energy transfer with the Power Calculator. By entering any two variables (Voltage, Current, or Resistance), this tool computes the electrical Power (P) in Watts. It is widely used to determine the wattage rating required for components to prevent them from burning out.

Efficiency Calculator

No system is 100% efficient. The Efficiency ($\eta$) Calculator computes the ratio of output power to input power to determine energy losses. Understanding efficiency is critical for designing motors, transformers, and power supplies that meet modern energy standards and reduce waste.