18650 Battery Pack Calculator and Planner
Select a cell from the cell database
Use this autocomplete search functionality to find your specific cell in order to pre-populate the values that we have for that cell.
Single cell information
Enter information on a single cell into the input fields to receive results for a single cell. Results will automatically generate every time a value changes and there is enough information to calcualte results.
The C-rate will be used down below at pack level calculations, so make sure you fill this section out.
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Pack level information
Enter information related to your up-and-coming pack to get all kinds of information on the pack.
The C-rate, voltage, and capacities from the single-cell step will be used to calculate information in this step. Make sure that you fill out the fields above to get accurate results in this section.
If this is your first time planning out a battery pack, check out our guide on how to build an 18650 battery pack .
Virtual battery life calculator
This section allows you to get an idea of approximately how long the battery life of the pack you are building will be. For now this calculates battery life at a fixed load amount, if you have ideas on how we can improve this calculator's functionality fill out a contact form and let us know!
For example If you plan on running something that consumes 1000W and your battery pack is 1kwh you can now estimate the life of the battery at a given load in watts.
Pack weight and cell cost
This section estimates the cost and weight of the pack based on cell count, single cell weight, and cost per cell.
The series and parallel information from the above step are used to calculate this information, so make sure you fill out the above step first.
Keep in mind that you'll also need to add a BMS to your pack, so that will add to the overall cost and weight. Check out this post we wrote to learn about choosing a BMS for your lithium ion battery pack.