Quick UPS Input & Rectifier Current Calculator — Get Amps from kW, PF & Efficiency

Quickly convert kW, power factor and efficiency into the amps your UPS needs with our UPS input current calculator. Get instant, accurate input and rectifier current estimates to simplify sizing and troubleshooting.

Instant UPS/Inverter Output Current Calculator: kVA to Amps for 1-Phase & 3-Phase

Convert kVA to amps in seconds with our instant UPS/Inverter output current calculator. It handles both 1-phase and 3-phase systems and gives clear results to help you size equipment confidently.

UPS Battery Ah Calculator: Quickly Determine Amp-Hours Needed for Your Target Runtime & Load

Need to know how long your backup will last? Our UPS Battery Ah Calculator helps you quickly determine the UPS battery amp hours required for your target runtime and load.

Instant UPS Battery String Sizing Calculator: Get Series/Parallel Counts & Target DC Bus Voltage

Take the guesswork out of backup design with our instant UPS battery string sizing calculator — get recommended series and parallel counts and the target DC bus voltage in seconds. Build reliable UPS battery packs faster and with confidence.

Free UPS Runtime Calculator: Predict Run Time from Load (kW), Battery Voltage, Ah & Efficiency

Use our free UPS runtime calculator to quickly predict backup run time from load (kW), battery voltage, Ah and efficiency—no guesswork required.