Free lab testing tools
Utilities for making sense of blood work — built on the same reference catalog and pricing data that power TestWell's test pages. No account needed; each tool links to the biomarker guide and the test that produces the number.
Reference Range Lookup
Normal ranges for 130+ blood tests, filtered by sex and age, with units and sources.
Open toolLab Unit Converter
Switch any common blood test between US and SI units, with the exact factor shown.
Open toolFree Testosterone Calculator
Free and bioavailable T from total T + SHBG + albumin, using the Vermeulen equation.
Open toolLab Location Finder
Search 4,000+ Quest, Labcorp and BioReference draw sites by ZIP, with hours and directions.
Open toolHow do these tools relate to ordering a test?
Each tool is a front door to the catalog rather than a standalone widget: look up a range and you can open the marker's full guide; convert a value and you land on its reference range; calculate free testosterone and the test that measures total T and SHBG is one click away. Prices shown are live from the catalog, orders are physician-authorized, and draws happen at Quest, Labcorp or BioReference locations in 49 states.