AboutPrivacy-policyTerms-conditionsFaqContact

    Voltage Drop Calculator: Wire Size & Circuit Loss Analysis Tool Online

    Created by Md jony islam

    Calculate voltage drop in electrical circuits based on wire size, length, and current. Determine optimal conductor specifications to prevent power loss and ensure safe, efficient electrical installations. Wire resistance and impedance cause the voltage level to decrease along an electrical circuit, and this is what a voltage drop calculator measures. Based on electrical regulations, the amount of voltage dip should not be higher than 3% for power circuits and 5% for lighting. Causes of voltage drop may include the size of the conductor, the length of the circuit, the current being drawn, and the kind of load on the circuit.

    Voltage Drop Calculator

    Calculate voltage drop in electrical circuits and cables with our professional calculator. Supports single-phase, three-phase, and DC systems with various load types including motors, lighting, and mixed loads.

    Circuit Specifications

    Cable Specifications

    Load Specifications

    Learn how we tools this below

    Add this tools to your site

    Buy me a for Source Code

    What is the Voltage Drop?

    A voltage drop calculator helps accurately measure the amount of electrical potential that changes in any current-carrying part of an electrical system. Through this, engineers, installers, and electricians can confirm that electric systems do not exceed the allowed 3% drop in branch circuits and 5% drop in feeders and branch circuits.

    🙋 Try our Peak Voltage Calculator . If you want to learn more about conversions using Electrical Engineering Project Calculators.

    Cable impedance loss calculator

    Properly sizing conductors, correcting power issues, saving energy, and sustaining electrical equipment efficiency are possible with voltage drop calculations. The calculator uses wire size, type of conductor, distance, current flowing, power factor, and type of circuit (single- or three-phase) to generate correct results.

    Suggested Reading

    Frequently Asked Questions - Voltage Drop Conversion FAQs:

    What is voltage drop?

    Voltage is reduced as the electric current moves through a wire or device. Because wires are somewhat resistant, some of the voltage from the source is removed while going to the load.

    What is the formula for voltage drop?

    The typical expression is Voltage Drop (V) = Current (I) × Resistance (R). A formula for wiring can be V = I × 2 × L × R, where L represents the one-way wire length and R is the resistance per unit length.

    Why is voltage drop important?

    Changes in voltage can be serious, as too high can prevent devices from working correctly and safely. It might result in lower efficiency, increased heat, or harm to the electrical equipment.

    Is 3% or 5% voltage drop acceptable?

    For many electrical setups, the suggested drop for critical loads is 3%, and up to a 5% drop is okay for general wiring. Low voltage drop means more safety and a more efficient power supply.

    How can voltage drop be reduced?

    Using thicker wires, making wires shorter, or lowering the current will help reduce voltage drop. Picking the right gauge and type of wire lowers the chances of voltage being too high.

    You may like these posts

    About the Author

    Md Jony Islam

    Md Jony Islam: Multidisciplinary Engineer & Financial Expert:

    Md. Jony Islam is a highly skilled professional with expertise in electronics, electrical, mechanical, and civil engineering, as well as finance. Specializing in transformer service and maintenance for 33/11kV substations, he ensures reliable and efficient electrical systems. His mechanical engineering skills drive innovative designs, while his financial acumen supports effective project budgeting. With a strong foundation in civil engineering, he contributes to robust infrastructure development. Md. Jony Islam's multidisciplinary approach ensures efficiency, quality, and reliability across all projects.