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Battery Pack S×P Calculator

Science & Engineering

Series×parallel pack voltage, Ah, Wh, cell count

Quick Answer

Battery Pack S×P Calculator: Series×parallel pack voltage, Ah, Wh, cell count. Battery Pack S×P Calculator uses standard science & engineering formulas to compute accurate results instantly.

Cell spec & configuration

V
mAh
Pack energy444 Wh

10S4P · pack voltage 37 V · capacity 12 Ah · 40 cells

Calculation

  1. 1Pack voltage = 10 × 3.7 V = 37 V
  2. 2Pack capacity = 4 × 3,000 mAh = 12 Ah
  3. 3Energy = 37 V × 12 Ah = 444 Wh; cells 10×4 = 40
In series (S) voltages add and capacity stays; in parallel (P) capacity adds and voltage stays; pack energy Wh = pack voltage × pack capacity (Ah). Common configs: e-bike 13S (48V), power tools 10S (36-37V), power stations 13-16S. Notes: a series string performs only as well as its weakest cell — test capacity and internal resistance per cell before grouping (good cells are 30-50mΩ); BMS and charger must match full-charge voltage (Li-ion 4.2V/cell, LiFePO4 3.65V/cell) and cutoff; each nickel-strip joint adds 5-10mΩ. Compare packs by Wh, not Ah — energy determines runtime.

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How to Use

  1. Enter known quantities: fill values and confirm units in the Battery Pack S×P Calculator.
  2. Instant solution: unknowns solve live with the formula shown transparently.
  3. Use constant/material tables: standard physical constants and material data are listed on this page.
  4. Compare conditions: change inputs to compare scenarios.

Key Points

  • Battery Pack S×P Calculator is a free online science & engineering tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: Series×parallel pack voltage, Ah, Wh, cell count.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Battery Pack S×P Calculator formula

Battery Pack S×P Calculator uses standard science & engineering formulas to compute accurate results instantly.

FAQ

How do I use the Battery Pack S×P Calculator?
Open the page and fill in the input fields — results update automatically. Series×parallel pack voltage, Ah, Wh, cell count.
Are the results accurate?
Yes. Standard formulas and conversion factors are used and verified.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on phones, tablets and desktops.
Is my data saved?
No. Everything runs locally in your browser.

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Source & Updates

Based on CODATA recommended constants and standard physics formulas. Last updated: 2025-07

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. Battery Pack S×P Calculator[EB/OL]. https://www.yijiansuan.com/en/c/science/battery-pack

Results provided by this tool are for reference only and do not constitute professional advice.