Electronics & Electrical Calculators

A selection of tools for electronics hobbyists, DIYers, and professionals. These calculators help with common tasks like decoding SMD resistor codes and estimating the runtime for battery backup systems.

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SMD Resistor Calculator

Quickly decode 3-digit, 4-digit, and EIA-96 codes found on Surface-Mount Device (SMD) resistors to find their resistance value.

Battery Backup Calculator

Estimate the runtime of a battery backup system (like a UPS or inverter) based on the load and battery capacity.