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Lookup
Look up a lab result
Enter a number from your report and see which band the body that publishes the reference range puts it in, with the source and its effective date. Your number is not saved to our database.
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Converter
A1C to average glucose
Turn an A1C percentage into the estimated average glucose it represents, in mg/dL and mmol/L, using the ADAG equation the ADA uses.
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Calculator
GLP-1 cost calculator
What Wegovy, Zepbound or compounded semaglutide costs over the months you choose, program fees separated, prices as of Aug 19, 2026.
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Lookup
Screenings by age
Enter your age and get your decade's screening schedule, every row from the recommending body with its source and date.
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Self-tests
Mental health self-tests
The PHQ-9 depression and GAD-7 anxiety screeners, scored exactly as their validation studies score them. Answers are never stored.
The rules every tool here follows
A health calculator is only as good as the numbers it was built from, so each tool on this page publishes its sources the way a guide does. The A1C converter uses the ADAG equation the American Diabetes Association adopted for the eAG values on lab reports, and names the study it came from. The lab lookup places a number in bands defined by the body that publishes them, with that body's effective date on the row. The screenings tool returns each row's recommending body, its grade where one exists, and the source's own date. The cost calculator reads manufacturer and program prices from their own pages and prints the date each was read, so a stale price is visibly stale rather than silently wrong.
Two more rules. Nothing you enter is saved to our database unless you choose to keep it. A questionnaire answer is sent to our server to score the test and is not stored; the self-tests add only an anonymous daily count of completions by score band and, if you gave one, age decade, with no identifier. A lab value or an age is not saved to our database either, but it travels in the page's web address so a result can be linked; our analytics is set to receive only the page path on those tools, and the address can appear in our server's request logs. A lab result is saved only if you save it to your own account. And where a tool computes rather than looks up, it shows the arithmetic, so a reader can check it against the source. None of these tools diagnoses anything. Each one is built to make the conversation with a clinician shorter and better informed.
Reference, not tools