Health Tools & Calculators

Calorie Calculator

Work out the calories you need, then see what actually happens to your weight, including where it plateaus and why.

Calculate your calories

Blood Value Checker

Instantly check whether your blood value falls within the reference range. Pick a biomarker, enter your result, and see where you stand.

Check your value

Biological age

Estimate your biological age from 9 blood values using the scientific PhenoAge method. See whether your body is younger or older than your calendar age.

Calculate your age

Free testosterone calculator

Estimate your free testosterone with the Vermeulen equation from total testosterone, SHBG and albumin.

Calculate free testosterone

Heart age calculator

Estimate the age of your heart from your cholesterol, blood pressure and lifestyle using the Framingham model. See whether your heart is older or younger than you.

Calculate your heart age

Kidney function calculator (eGFR)

Calculate your eGFR from creatinine with the CKD-EPI 2021 equation. Train hard or take creatine? Your creatinine can run high with nothing wrong with your kidneys, and cystatin C shows what is really going on.

Calculate your kidney function

Cholesterol check

Non-HDL, remnant cholesterol, your ratios and LDL from two equations. Your total cholesterol says little; this shows which number actually matters.

Check your cholesterol

Blood test finder

Not sure which blood test fits you? Answer 6–8 questions and see which test fits your story — based on the NHG guidelines GPs use. Including what you can skip.

Start the test finder

Body fat calculator

Estimate your body fat percentage with a tape measure using the US Navy method. You get the honest margin with it, so you know how solid the number is.

Calculate your body fat