Lithocarpus kalkmanii is a tree in the beech family Fagaceae.

[2] Lithocarpus kalkmanii grows as a tree up to 30 metres (100 ft) tall with a trunk diameter of up to 60 cm (24 in).

Its coriaceous leaves are tomentose and measure up to 15.5 cm (6 in) long.

[3] This basal material becomes woody, granular and hard and replaces the outer wall of the ovary as the mechanically protective tissue for the seed.

This species probably belongs to the subgenus Eulithocarpus, based on Camus' infrageneric classification system,[4] because of its 'ER' fruit morphology and the few widely spaced concentric lamellae on the cupule.