Free keto & fasting calculators
Quick, accurate tools to nail your macros, count net carbs and plan your fasting window. No account needed — your numbers stay in your browser.
Keto Macro Calculator
Get your daily net-carb, protein, fat and calorie targets from your weight, height, activity and goal — in seconds.
Open the calculator →Net Carb Calculator
Work out the net carbs in any food by subtracting fibre and sugar alcohols from total carbs — the number that actually counts on keto.
Open the calculator →Fasting Window Planner
Pick a protocol — 16:8, 18:6, 20:4 or OMAD — and see your exact eating and fasting windows, plus when ketosis and autophagy kick in.
Open the calculator →Got your numbers? Get the plan.
The 5-Day Keto Kickstart turns your macros into real meals — with net-carb counts, a shopping list and a fasting schedule. Free, straight to your inbox.
Want the calculators to do the logging for you?
Keto Club tracks your macros, fasting stages and workouts automatically — and adapts your targets as you cycle through your phases.