How much juice is in one coconut?

The amount of juice in a coconut can vary depending on the size and type of coconut. On average, a mature coconut can hold anywhere from 200 to 300 milliliters (6.7 to 10.1 fluid ounces) of coconut water. Some larger coconuts may contain up to 500 milliliters (16.9 fluid ounces) of juice.