The average weight of a 14-year-old female is roughly 105 pounds, according to Disabled World. This weight depends on the female's height. The average female height at age 14 is 62.5 inches.
The average weight is not an accurate representation of what every 14-year-old girl should weigh. The healthiest average weight for a female or male at any age is dependent on height. A BMI chart, or body mass index chart, for teens helps determine the average weight, notes Disabled World. If a female is taller than average, she is expected to weigh more. For example, a 14-year-old female who is 70 inches tall is considered underweight at the average weight of 105 pounds.