Free tools

Free hormone and DNA tools

Calculators and checkers for blood results and raw DNA files. They run in your browser, so nothing you type or open is sent or stored.

• Free testosterone calculator

  Free and bioavailable testosterone from total testosterone, SHBG and albumin, using the Vermeulen formula.

• Hormone unit converter

  Convert testosterone, oestradiol, DHT, prolactin and other results between UK (SI) and US units.

• Testosterone level checker

  Place a testosterone result against UK thresholds and a harmonised adult range, with what changes with age.

• Raw DNA hormone gene checker

  See your genotypes at studied hormone-gene variants from a 23andMe or AncestryDNA file, read in your browser.

• Steroid blood test checklist

  A printable checklist of blood tests and health checks for anyone using, or thinking about, anabolic steroids.

• Which test do I need?

  Four questions that tell you whether a blood test, a genetic test or your GP answers what you want to know.