Habits
Bedtime Minus Caffeine Math
Bedtime minus caffeine math subtracts your buffer hours from lights-out to set last call—making cutoff a clock equation, not a vague rule.
Bedtime minus caffeine math sets last call as target lights-out minus your personal buffer—eight, nine, or ten hours—written on the calendar like a meeting. A 10:30 p.
m. bedtime with a nine-hour buffer means no caffeine after 1:30 p.
m. , including tea and powder.
Adjust buffer length from two-week latency data, not social defaults.
Common questions
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What if bedtime varies on weekends?
Use the earlier bedtime in the equation for safety, or set two buffers—weekday and weekend—and log which you followed in Ohga for two weeks.
Related terms
Put Bedtime Minus Caffeine Math into practice
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