ConverterHub

Battery Size Lookup

Enter a battery code to see its voltage, size, and chemistry.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

Common battery names like AA, 9V, CR2032, and 18650 are shorthand for standardized codes set by bodies such as IEC and ANSI, each specifying a fixed physical size, nominal voltage, and typical chemistry. An AA cell, for instance, is always about 14.5 mm by 50.5 mm regardless of brand, while a CR2032 is a 20 mm-diameter, 3.2 mm-thick lithium coin cell at 3 volts — the codes exist precisely so any compatible battery fits any device designed for that size.

This lookup tool matches a battery code to its voltage, dimensions, and common chemistry (alkaline, lithium, NiMH, and so on) in one step. It's a handy reference for electronics hobbyists, repair technicians, and anyone replacing a battery in a device like a watch, remote, camera, or flashlight, where picking the wrong physical size or voltage can mean a battery that simply doesn't fit or under/overpowers the device.

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