The Kerr Solution has come to be regarded as the most important exact solution to any equation in physics and has been pivotal in understanding the most violent and energetic phenomena in the Universe.
Prof Kerr's solution has already been recognised by the Royal Society, which awarded him its Hughes Medal in 1984, and by the Royal Society of New Zealand which awarded him its Hector Medal in 1982 and its Rutherford Medal in 1993.
The Einstein Medal is awarded annually by the Einstein Society which is based in Bern, where Einstein completed his revolutionary work in the first decade of the 20th century.
The Einstein Society works with the University of Bern to preserve Einstein's legacy through different activities and, in particular, by annually awarding a medal "to deserving individuals for outstanding scientific findings, works, or publications related to Albert Einstein".
The medal was first awarded to Stephen Hawking in 1979 and, since then, many distinguished scientists have received the medal including six Nobel laureates.
Professor Kerr said he was honoured to receive the award for his achievements.
Canterbury University acting vice-chancellor, Professor Ian Town, said the university was "immensely proud" of Prof Kerr's achievements.