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Tools

Look it up, work it out

Small tools built on the same rule as the rest of the site: every number traces to a primary source with its date, and anything we compute shows its arithmetic.

  • 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.

    Convert an A1C

  • 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.

    Work out the cost

  • 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.

    See your screenings

  • 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.

    See the tests

Reference, not tools