N/P Ratio Calculator

Calculates the negative-to-positive electrode capacity ratio from areal capacities.

N/P = Q(anode areal) ÷ Q(cathode areal), where Q(areal) = specific capacity × loading

Don't know loading? Calculate from thickness instead

Anode specific capacity (mAh/g)

Anode loading (mg/cm²)

Cathode specific capacity (mAh/g)

Cathode loading (mg/cm²)

Anode chemistry (for reference range)

N/P ratio:

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Reference ranges shown are commonly cited in literature and patents, not universal rules — actual production targets vary by manufacturer, fast-charge requirements, and specific material grades. Graphite: ~1.04–1.20. Silicon-blended (20–50% Si): ~1.2–1.6. Silicon-dominant: ~2.0–4.0. LTO-based: often ~0.87–1.02, since LTO does not plate lithium the way graphite does.

N/P Ratio Calculator

N/P Ratio Calculator

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