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Habit Formation Timeline Calculator
Discover how long it really takes to form your habit based on scientific research from University College London.
The Truth About Habit Formation
You've probably heard that it takes 21 days to form a new habit. This myth has been repeated so often it feels like fact. But research tells a very different story.
A 2009 study by Phillippa Lally at University College London found that habit formation takes an average of 66 days, with a range from 18 to 254 days depending on the habit's complexity and the individual.
What Affects Habit Formation Time?
- Complexity: Simple habits (drinking water) form faster than complex ones (daily meditation)
- Frequency: Daily habits form faster than weekly ones
- Context: Same time and place speeds up formation
- Enjoyment: Pleasant habits are easier to maintain
- Individual differences: Some people form habits faster than others
💡 Pro Tip
Missing one day doesn't ruin your progress! The key is getting back on track quickly. Never miss twice.