What this result means
Caffeine is common pre-race, but dose should scale with body mass. Sports nutrition references often cite 3–6 mg/kg taken 30–60 minutes before start.
This page computes that range from your mass and shows the timing window. It does not recommend whether you should use caffeine.
70 kg → 210–420 mg caffeine (3–6 mg/kg). At 60 kg → 180–360 mg. Compare to your coffee, gel, or tablet label.
Calculation method
low = 3 × mass; high = 6 × mass (mg). Timing window 30–60 minutes pre-race per ISSN-style guidance on /methodology.
Heart conditions, anxiety, and medications are not modeled. Consult a clinician if unsure.
Not medical advice.
Frequently asked questions
How much caffeine should I take before a race?
ISSN-style guidance is often 3–6 mg/kg body mass. Enter your mass to see the milligram band.
When should I take caffeine?
Commonly 30–60 minutes before the start so peak levels align with racing. Individual response varies.
Does this count coffee?
Yes if you know the caffeine milligrams. Labels differ widely between brews and brands.
Do I need an account?
No.
Should everyone use caffeine before racing?
No. Sensitivity, sleep, heart conditions, and anti-doping rules differ. This page only prints a literature-based dose band for planning.