Evidence-Based
Free Educational Tools
Interactive calculators, cognitive timers, and scheduling engines designed for serious learners.
Study Time Calculator
Calculate required weekly study hours to achieve your target mastery by deadline.
Exam Countdown & Milestones
Live visual countdown timer with revision phase breakdown and milestone alerts.
Reading Time Calculator
Calculate estimated reading time based on text complexity and your reading speed.
Spaced Repetition Review Planner
Calculate scientifically optimal review dates based on the Ebbinghaus forgetting curve.
Online Course ROI & Cost Calculator
Compare subscription costs vs upfront course pricing and calculate your true learning cost.
College & Semester GPA Calculator
Quickly compute current semester GPA and cumulative projected GPA.