EDC - Energy Density Calculator Online

Blog | October 8, 2025

Enter capacity (mAh) and weight (g). Optional voltage and volume.

Capacity (mAh) ^1000mAh=1Ah

Weight (g) ^1000g=1kg

Nominal Voltage (V)

Volume (cm³) ^{1000 mm³=1 cm³ , 1000 cm³=1 L}

Estimate volume (density 2.5 g/cm³)

Energy (Wh)

Wh = (mAh / 1000) × V

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Wh/kg

Wh ÷ (weight g ÷ 1000)

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Wh/g

Wh ÷ weight (g)

—

Wh/L

Volume required (L)

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Results rounded to 1 decimal.

The Energy Density Calculator (EDC) is a free online tool that helps you quickly calculate the energy density of a battery in Wh/kg and Wh/L. Simply enter the capacity (mAh), voltage (V), and either the weight (g) or volume (cm³) to get accurate results instantly. This calculator is ideal for comparing different battery chemistries such as Li-ion, LiFePO4, NCM, and LFP, and for evaluating the performance of cells used in EVs, drones, solar storage, and portable devices. Use this tool to better understand the balance between weight, volume, and energy output in modern battery design.