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How-to guide

How to Calculate Battery Series Voltage: Formula, Steps & Examples

Learn how to calculate Battery Series Voltage — the formula explained step by step, with worked examples and a free calculator to check your answer.

By Arjun Desai, B.Tech (Engineering) · Updated Jun 2026 · 2 min read

Calculating your total voltage is straightforward once you know the Battery Series Voltage formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Battery Series Voltage Calculator.

What is Battery Series Voltage?

The Battery Series Voltage calculation tells you your total voltage from a few simple inputs. The figure you are solving for here is the total voltage.

The Battery Series Voltage formula

The core formula is:

Total voltage = Number of cells × Voltage per cell

Here is what each input means:

  • Number of cells — a number. Example: 4.
  • Voltage per cell — a value measured in V. Example: 3.7 V.

How to calculate it step by step

  • Write down the number of cells (for example, 4).
  • Write down the voltage per cell (for example, 3.7 V).
  • Apply the formula above to get your total voltage.
  • Double-check the result with the Battery Series Voltage Calculator.

Worked examples

Example 1

Input / OutputValue
Number of cells4
Voltage per cell3.7 V
Total voltage14.80

With number of cells of 4 and voltage per cell of 3.7 V, the total voltage works out to 14.80.

Example 2

With number of cells of 8 and voltage per cell of 3.7 V, the total voltage works out to 29.60.

ResultValue
Total voltage29.60

Example 3

With number of cells of 2 and voltage per cell of 3.7 V, the total voltage works out to 7.40.

ResultValue
Total voltage7.40

Tips for an accurate result

  • Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
  • Round only at the very end. Rounding inputs early can shift the final answer noticeably.
  • Re-run the numbers whenever an input changes, rather than estimating from an old result.

Prefer not to do the maths by hand? — the Battery Series Voltage Calculator does it instantly, for free, with the formula and a worked example built in.

Continue exploring electrical calculators with these tools: Wire Resistance Calculator, Watts to Amps Calculator, kVA to kW Calculator, kWh to Joules Calculator, Resistance from Power Calculator.

Calculators in this guide

Frequently asked questions

The formula is: Total voltage = Number of cells × Voltage per cell. With number of cells of 4 and voltage per cell of 3.7 V, the total voltage works out to 14.80.

Gather each input, apply the formula step by step keeping your units consistent, and round only at the end. You can verify your answer instantly with the Battery Series Voltage Calculator.

It uses the standard formula with exact arithmetic, so the result is correct for the inputs you enter. Bear in mind that real-world outcomes can still differ when underlying assumptions change.

Arjun Desai · B.Tech (Engineering)

Arjun Desai is an engineer who writes about the practical physics, electronics and energy calculations behind everyday technology.