Education & Learning
30 free tools for students — CGPA, grades, maths, science, timers and more.
Grades & GPA
CGPA to Percentage
Convert CGPA to percentage for any university grading scale.
Percentage to CGPA
Convert percentage marks back to CGPA on a 10-point or 4-point scale.
Marks Percentage Calculator
Calculate percentage from marks obtained vs. total marks across subjects.
Grade Calculator
Find your grade letter and GPA points from percentage or marks.
GPA Calculator
Weighted GPA calculator — enter credits and grade points for each subject.
Attendance Percentage Calculator
Check if you meet the minimum attendance requirement and how many classes you can miss.
Study & Planning
Study Hours Planner
Plan daily study hours across subjects leading up to your exam date.
Exam Countdown Timer
Countdown to multiple exam dates with days, hours, and minutes remaining.
Pomodoro Timer
25-minute focus sessions with short and long breaks — classic Pomodoro technique.
Language
Flashcard Maker
Create digital flashcards and quiz yourself — great for vocabulary and definitions.
Spelling Checker
Type a word to check its spelling against a common English dictionary.
Synonym & Antonym Lookup
Find synonyms and antonyms for any English word to improve vocabulary.
Science & Maths
Periodic Table Explorer
Interactive periodic table with atomic number, mass, group, period, and electron config.
Chemical Formula Balancer
Balance chemical equations step by step with the algebraic method.
Quadratic Equation Solver
Solve ax²+bx+c=0 with the quadratic formula — shows discriminant and roots.
Matrix Calculator
Add, subtract, multiply matrices and find determinant and inverse for 2×2 and 3×3.
Prime Number Checker
Check if any number is prime and find prime factorisation instantly.
LCM & HCF Calculator
Find LCM and HCF for up to 5 numbers using prime factorisation method.
Fraction Simplifier
Simplify fractions to their lowest terms and convert to mixed numbers.
Scientific Calculator
Full-featured scientific calculator with trig, log, powers, and memory functions.
Trigonometry Values Table
Exact values of sin, cos, tan, cot, sec, cosec for standard angles 0° to 360°.
Log & Antilog Calculator
Calculate logarithm and antilogarithm for any base with step-by-step working.
Profit & Loss Calculator
Calculate profit, loss, percentage, selling price and cost price for any transaction.
SI Unit Converter
Convert between SI units for length, mass, time, force, energy, power and pressure.
Ohm's Law Calculator
Find voltage, current or resistance — V=IR with power calculation and circuit diagram.
Series & Parallel Resistance
Total resistance for up to 10 resistors in series or parallel, with substituted formula.
Speed of Sound & Light
Calculate distance or time for sound (any medium) or light travel with fun comparisons.
Escape Velocity Calculator
Escape velocity for Earth, Moon, Mars or any custom body — v=√(2GM/R) with steps.
Organic Chemistry Guide
Searchable reference for functional groups, homologous series, reactions and IUPAC rules.
History Timeline Maker
Add historical events by year and category and generate a colour-coded visual timeline.