Student tools
Make sense of grades and study time.
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GPA calculator
Calculate term and cumulative GPA from credits and points.
Required final grade
Find the exam score needed to reach your target.
Attendance calculator
Check attendance and remaining absences against your limit.
Grade to percentage
Convert a grade into a percentage or chosen scale.
Study time calculator
Distribute study sessions and breaks across your days.
Reading time
Estimate reading time at your chosen reading speed.
Clean PDF text
Clean pasted text with paragraph-preserving options.
Citation formatter
Format reference details you enter yourself.
Fraction calculator
Add, subtract, multiply or divide fractions with exact integer arithmetic, an intermediate fraction and its greatest common divisor.
Combinatorics calculator
Calculate factorials, permutations and combinations without replacement as exact integers, and download every result digit.
Prime factorization
Factor a bounded integer into ordered prime factors and their exponents, retaining the sign of a negative input.
Linear and quadratic equation solver
Solve a linear or quadratic equation from exact numeric coefficients, distinguishing real and complex roots, identities and equations with no solution.
Linear system solver
Solve a square linear system using exact fractions, with ranks, reduced row-echelon form and a residual, distinguishing unique solutions, infinitely many solutions and inconsistency.
Matrix calculator
Add, subtract or multiply matrices, or calculate a transpose, determinant, inverse or rank using exact fractions within bounded dimensions.
Flashcard maker
Create two-sided cards manually, reorder and flip them during review, and locally import or download your deck as JSON.
Study and break timer
Set a bounded work-and-break plan, start, pause and resume its remaining time, with progress calculated from the device clock.