Pregnancy
Due Date
Estimated delivery date from LMP, conception, ultrasound, or reverse, with milestones.
Open calculator →Sleep
Cycle
Best wake times and bedtimes based on 90-minute sleep cycles.
Open calculator →Blood Alcohol
Estimator
BAC from drinks, weight, sex, and time, with time-to-sober projection.
Open calculator →Caffeine
Half-Life
How much caffeine is still in your system, hour by hour, after every cup.
Open calculator →Testosterone
Dosage
Convert a prescribed dose to millilitres and syringe units, with ester weight and peak-to-trough swing.
Open calculator →Free
Testosterone
Free and bioavailable testosterone from total T, SHBG and albumin, via the Vermeulen equation.
Open calculator →Concentrate
to Edibles
Concentrate to mg per gummy, or backwards from a target dose, with decarb and infusion losses.
Open calculator →Drug Test
Detection Times
Estimated urine, blood and hair windows for six substances, weighted by how often you used.
Open calculator →