Free tool
Dose calculator.
Sodium bicarbonate is dosed by body weight — 0.3g per kilogram. Drag the slider to get your exact dose and a timing protocol built around your session.
Your dose
Your body weight
Weight70 kg
40 kg120 kg
Experience level
Start at 0.2g/kg for your first 2–3 sessions to let your gut adapt, then build to the full 0.3g/kg dose.
Your sodium bicarbonate dose
14g
Mix into 60–80ml of cold water, 90 minutes before effort.
≈ 0.7 BICARB.NET sachets
One 19g sachet = a full 0.3g/kg dose for a ~63kg athlete. Heavier athletes scale up.
Your blood, loading
Estimated bicarbonate elevation over the 3 hours after you drink it — scaled live to your dose. Drag the slider.
peak +0.0 mmol/L
Your timing protocol
T-2h
Last meal. Eat light. Food in your stomach slows absorption and raises GI risk.
T-90m
Take your dose. Mix 14g into 60–80ml cold water, shake 90 seconds, rest 3–5 min, drink the gel.
T-60m
Warm up. Your blood bicarbonate is loading toward peak.
T-0
Go. Peak buffer hits 60–90 min after intake. Race or train hard.
Before you start: Maximum 3 doses per week — sodium bicarbonate is high in sodium, so cut dietary salt on dose days and stay hydrated. Never use bicarb for the first time on race day; test the protocol in 2–3 training sessions first. This tool is educational and not medical advice. For athletes 18+.
Next step
Ready when you are.
You've got your dose and your timing. Bicarb 2.0 has been cancelled. We had the pellets — then our supplier backed out at the last moment and stole our deposit. bicarb.net is now closed.