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My lab always uses a calculation method to measure free t. And its always the same as when i calculate it on that website. So my lab seems pretty accurate. When i calculate m free t with Trut im over the range.. but i still have symtoms. So i dont use the Trut method because it does not match my symtoms. So your free t is only 14! If you still have symtoms you have a lot of room to go up!