Free T4 Benchmarks
Adult • All • All
EndocrineSelect Your Demographics
Understanding Your Free T4
For All aged Adult, the median free t4 is 1.2 ng/dL.
A value of 1.2 ng/dL means you're at the 50th percentile—half the population is above, half below. Values between 1.03 ng/dL (25th percentile) and 1.37 ng/dL (75th percentile) are typical.
The normal range spans from 0.79 ng/dL (5th percentile) to 1.61 ng/dL (95th percentile), covering 90% of the population.
Visual Distribution
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Frequently Asked Questions
What is a normal free t4 for Adult year olds?
For All aged Adult, normal free t4 ranges from 0.79 to 1.61 ng/dL. The median is 1.2 ng/dL.
What does the 1.2 ng/dL median mean?
The median of 1.2 ng/dL means exactly 50% of All aged Adult have a free t4 below this value, and 50% have a higher value.
Is my free t4 normal?
If your free t4 falls between 0.79 and 1.61 ng/dL, you're within the normal range for All aged Adult. Values at the extremes may warrant a conversation with your healthcare provider.
Data Source
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