Eupithecia grappleri is a moth in the Geometridae family. It is found in the region of Magallanes and Antarctica Chilena (Esperanza Province) in Chile. The habitat consists of the Southern Pacific Biotic Province. The length of the forewings is about 8.5 mm for males. The forewings are pale greyish white, with dark brown areas on the costa at the base. The hindwings are greyish white, with numerous grey and brown scales.