Make the start of study a bit easier.
How long it will take and how much it will cost per day
After calculation, focus on today’s study.
Online Lecture Playback Speed Calculator
Add up online lecture durations and calculate watch time and time saved at 1.25×, 1.5×, and 2× speed. Calculate up to 300 lectures for free.
Start calculatingCourse Completion Planner
Calculate how much to study each day to finish your remaining online lectures by the deadline. Build a daily plan that accounts for playback speed, study days, note-taking, and review.
Start calculatingWordbook·Flashcard
Create a pair of flashcards for front and back and evaluate directly or enter answers. Only practice mistakes from this session and save as CSV or JSON.
Start calculatingKorean and English typing practice
Check time, accuracy, and errors in Korean and English sentences. Measure completed characters and save results distinguishing mobile/PC keyboards.
Start calculatingCreate seat arrangement table.
Set empty seats and fixed seats in the seat grid, and arrange names. Save the actual row/column layout as PNG·SVG·CSV.
Start calculatingTarget Grade Calculator
Use the received score and reflection ratio to calculate the remaining average needed for the target final score. Separate impossible targets from completed assessments.
Start calculatingTextbook·problem study quantity plan
Divide the page and problem and completed page count by the remaining study days. Check the number by date and unassigned amount, then save it as CSV or calendar.
Start calculatingCreate a review schedule
Create a calendar using the learning date and directly set review intervals. Reflect rest days and save to CSV or ICS calendar file.
Start calculatingGrade calculator
Calculate your GPA from course grades and credits on a 4.5, 4.3, or 4.0 scale. Exclude P/F credits and include previous grades in your cumulative GPA.
Start calculatingPomodoro timer
Set focus·short break·long break and record sessions. Provides pause·focus screen and CSV save. The next phase is started directly
Start calculatingOnline timer
Run up to 5 timers together. Provides preset options for 1·5·10·25 minutes, individual time stops, optional stop sounds, and recording saving.
Start calculatingStopwatch
Record elapsed time, lab sections, and cumulative time per lab. Save up to 200 labs as CSV, excluding pause times.
Start calculating