Kenya is approximately 580,367 sq km, while United Kingdom is approximately 243,610 sq km, making United Kingdom 41.98% the size of Kenya. Meanwhile, the population of Kenya is ~53.5 million people (12.2 million more people live in United Kingdom).
This to-scale map shows a size comparison of Kenya compared to United Kingdom. For more details, see an in-depth quality of life comparison of United Kingdom vs. Kenya using our country comparison tool.