About Us
Voltage-DropCalculator.com was built for the moment you’re planning a run and need a quick, clear answer: “How much voltage will I actually have at the load?”
Voltage drop is simple in concept but easy to misjudge in practice—especially when you’re switching between copper vs aluminum, comparing AWG/kcmil sizes, accounting for power factor, or deciding whether parallel runs will help. So we built a calculator that’s real-time and focused on the inputs electricians and engineers actually use.
What the tool helps you do
- Estimate Voltage Drop, Percentage Drop, and Voltage at Load instantly.
- Switch between DC, AC single-phase, and AC 3-phase calculations.
- Compare conductor choices (copper vs aluminum) and see how wire size affects efficiency.
- Factor in conduit material and parallel runs for heavier loads and longer distances.
- Work in the units you need (feet, meters, kilometers) and reset quickly to sanity-check scenarios.
What we care about
- Clarity. Clean inputs, instant outputs, and helpful tips right where you need them.
- Transparency. We explain what voltage drop is and show the common formulas used.
- Practical guidance. “Recommended limits” are shown as guidance—not as guarantees.
- Speed. Built to feel instant on phones and desktops alike.
Say hello
If you notice a bug, want a new feature (like temperature correction, more wire tables, or exportable reports), or think an explanation can be clearer, reach out via the contact page.
Last updated: November 30, 2025