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Cables & Electrical Power Calculators
Calculate extension cord voltage drop and EV charging cord length. Pick the right wire gauge and cord length for safe, efficient electrical work.
New here? The guides answer the questions behind these calculators with worked numbers first, then link the right tool.
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Charging Cord Length
Calculate and optimize USB charging cable length, power delivery efficiency, and voltage drop for phones, tablets, and laptops.
Extension Cord
Extension cord gauge calculator: find the right wire gauge (AWG) for your cord length and amps, and check the voltage drop for tools, appliances, and outdoor equipment.
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