Free to use
Tools to make sense of your numbers.
Calculators and checkers that put a blood result in context. Use any of them without an account. When you want to keep the read, sign in or have it emailed to you.
Which Blood Test Do I Need?
Answer a few questions about your goals and we will recommend the right panel for you.
For anyone unsure which panel fits their goals.
Longevity Baseline Plan
A free four-week plan built from a three-minute quiz, before any blood is drawn.
For anyone who wants a starting point today.
Free Testosterone Calculator
Enter your total testosterone and SHBG to see your calculated free and bioavailable testosterone.
For men who already have a testosterone result and want the free fraction.
Hormone Test Timing Calculator
Find the days in your cycle when FSH, LH, oestradiol and progesterone read most reliably.
For women planning a hormone test around their cycle.
Testosterone by Age Checker
See where your total testosterone sits against the typical UK range for your age.
For men with a testosterone result who want age context.
Testosterone Unit Converter
Convert a testosterone result between nmol/L and ng/dL instantly.
For anyone converting a testosterone result between units.
Cholesterol Result Decoder
Enter your cholesterol numbers to see your non-HDL and TC:HDL ratio against UK targets.
For anyone with an NHS cholesterol result who wants the full picture.
More on the way
- Perimenopause Symptom Reflection
- Thyroid Result Decoder