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Banana Standard

We use 17.78 cm (7 in) as the average banana length — the typical size of a medium Cavendish banana.


For weight, we use 170 g (6 oz) — the average weight of a medium banana with peel.

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Converting bananas to millimeters (bn to mm)

Conversion Formula

To convert bananas to millimeters, use the formula: mm = bn × 177.8

Quick Reference

Looking to convert bn to mm? Our calculator handles length conversions instantly. Plus, see your result in bananas for a fun visual reference!