Your files stay on your device

# Battery Series-Parallel calculator

Sizes a series-parallel battery pack from cell specs and reports voltage, capacity, energy, current limits, load draw, and a cable check.

Enter the cells to size the pack.

Series multiplies voltage, parallel multiplies capacity, and the two counts together are how many cells you need to buy. The C-rate ceilings, internal resistance, and cable verdict are estimates from the specs you typed, not a datasheet: a real cell's continuous rating comes from its manufacturer, a BMS watches what this page cannot see, and the cable model ignores bundling, insulation rating, and connectors. Stay well inside the numbers for anything that can burn.
Options

## More unit & math tools

- [Battery test](/device/battery)
- [4-20 mA scaling](/converters/4-20ma-scaling-calculator)
- [Unit converter](/converters/units)
[All unit & math tools](/converters)

Was this tool useful?
YesNo

---

Canonical HTML: https://nutter.tools/converters/battery-series-parallel-calculator
Markdown version: https://nutter.tools/converters/battery-series-parallel-calculator.md
Plain-text version: https://nutter.tools/converters/battery-series-parallel-calculator.txt
Agent index: https://nutter.tools/llms.txt