Study Smarter, Not Harder,
Spaced Intervals That Stick.
Free study calculators: spaced-repetition study schedules sized to your exam date, GPA on the 4.0 scale, and the grade you need on the final. No sign-up.
Ebbinghaus Spaced Intervals
Review at day 1, day 3, day 7, and day 21 to interrupt memory decay curves permanently.
Final Exam Score Needed
Calculate exactly what score on the final exam secures an A, B, or passing course grade.
Weighted GPA Scaling
Account for credit hours and AP/honors weight boosts when planning college applications.
StudyPlan Tools
Study Schedule Calculator
Spaced-repetition study plan sized to your exam date, topics, and honest daily hours.
GPA Calculator
GPA on the standard US 4.0 scale — letter grades and credits in, weighted average out.
Grade Needed on Final Calculator
The exact score your final requires for a target course grade — with the reality check.
Practical Guides & Best Practices
Spaced Repetition: The 1-3-7 Rule and Why Cramming Loses
Memory decays on a curve; reviews timed at the forgetting point flatten it. The spacing effect, the intervals, and the schedule that survives.
GPA Strategy: Where Effort Actually Moves the Number
Credit-weighting, the marginal-grade math, and the courses that repay study hours fastest — GPA as an optimization problem.