Comparison of Two Apparent Sizes

Calculator for angular diameter or apparent size of two objects and comparison of the sizes. The angular diameter is calculated from the actual size and distance. Please enter these two values to calculate a comparison of the sizes.

Example: the thumb is 2.5 cm wide and 60 cm from the eye. The moon is 3474 km wide and an average distance of 384400 km. This makes the thumb appear 4.6 times larger.