The full bench.

Free student grade and study calculators for final grades, weighted averages, GPA, study time, and academic planning.

• grades
• GPA
• study planning
• school

• Final grade calculator
• Weighted grade calculator
• GPA calculator
• Study time calculator

Free gacha, blind box, Ichiban Kuji, random booster, and prize odds calculators for collectors and chance-based purchases.

• probability
• gacha
• blind box
• collectibles

• Gacha probability calculator
• Blind box odds calculator
• Expected cost calculator
• Ichiban Kuji-style prize pool calculator

A browser-based calculator for estimating the final exam score needed to reach a target course grade.

• grades
• final exam
• student planning
• school

• Required final exam score
• Current grade and target grade inputs
• Final exam weight model
• Browser-based calculation

A browser-based calculator for estimating the chance of at least one success across repeated independent attempts.

• probability
• risk
• repeated attempts
• odds

• At least one success probability
• Miss chance calculation
• Single-attempt rate input
• Repeated attempt model

A browser-based calculator for combining assignment, quiz, exam, and project scores using course category weights.

• grades
• weighted average
• course planning
• school

• Four weighted category rows
• Weighted course grade estimate
• Unused row handling
• Browser-based calculation

A browser-based planner for estimating daily study time from available days, total study hours, review sessions, and buffer time.

• study planning
• time management
• school
• planning

• Daily study time estimate
• Buffer time adjustment
• Review session planning
• Browser-based calculation

A browser-based planner for turning a due date, workload estimate, weekly availability, and buffer days into a realistic assignment pace.

• deadlines
• assignment planning
• time management
• student tools

• Due-date workload pacing
• Buffer-day protection
• Weekly availability estimate
• Daily capacity check

A browser-based calculator for estimating long-run expected cost from a single-attempt success rate and price per attempt.

• expected cost
• probability
• collectibles
• budget

• Expected attempts estimate
• Expected cost estimate
• Success rate and price inputs
• Responsible-use explanation

A browser-based calculator for planning the daily and weekly pace needed to reach a target before a deadline.

• goal planning
• daily target
• deadline
• pace

• Daily pace estimate
• Weekly pace estimate
• Progress and remaining amount
• Active-days-per-week planning

A browser-based calculator for finding percent increase, percent decrease, and the absolute difference between an old value and a new value.

• percentage
• change
• comparison
• planning

• Percent increase calculation
• Percent decrease calculation
• Absolute difference result
• Plain-English interpretation

A browser-based calculator for comparing price per unit across packs, boxes, bundles, servings, pages, or other countable quantities.

• unit price
• budget
• comparison
• shopping

• Price per unit calculation
• Package count handling
• Total units estimate
• Budget comparison support

A browser-based calculator for finding elapsed time between a start time and end time, with optional break minutes and overnight handling.

• time
• duration
• hours
• planning

• Elapsed time calculation
• Break minutes adjustment
• Overnight time handling
• Decimal hours output

A browser-based calculator for turning an original price and discount percent into final price and savings.

• discount
• price
• savings
• shopping

• Final price calculation
• Savings amount
• Percent-off handling
• Plain-English result explanation

A browser-based calculator for splitting a bill with tip across multiple people.

• tip
• bill split
• restaurant
• planning

• Tip amount calculation
• Total with tip
• Per-person split
• Flexible group size

A browser-based calculator for estimating reading time from word count, reading speed, and optional review buffer.

• reading time
• study planning
• word count
• students

• Reading time estimate
• Words-per-minute input
• Optional review buffer
• Study planning interpretation