New Zealand is approximately 268,838 sq km, while United States is approximately 9,833,517 sq km, making United States 3,558% larger than New Zealand. Meanwhile, the population of New Zealand is ~4.9 million people (327.7 million more people live in United States).
This to-scale map shows a size comparison of New Zealand compared to United States. For more details, see an in-depth quality of life comparison of United States vs. New Zealand using our country comparison tool.