Free · 36 calculators and tools · Class 1 to college
Free calculators for students
Percentage, CGPA, marks, word counter, area, date, square root and more — every calculator shows the full working, like your textbook. Filter by category, class and type to find the right one.
All tools
- Words, characters, sentences and reading time — Hindi and Marathi too.⭐ Popular · FreeOpen →
Word Counter
Class 1–12 · CollegeChecker - X% of Y, what percent, and % increase or decrease.⭐ Popular · FreeOpen →
Percentage Calculator
Class 6–12 · CollegeCalculator - CGPA to percentage (CBSE × 9.5), SGPA to CGPA and back.⭐ Popular · FreeOpen →
CGPA Calculator
Class 9–12 · CollegeCalculator - Area and perimeter of 8 shapes with the formula and steps.⭐ Popular · FreeOpen →
Area Calculator
Class 1–10Calculator - Days between two dates, working days, and add or subtract days.⭐ Popular · FreeOpen →
Date Calculator
Class 1–12 · CollegeCalculator - Add or subtract hours and minutes, and time between two clock times.FreeOpen →
Time Calculator
Class 1–12 · CollegeCalculator - Numbers to Roman numerals and back, 1–3999, with a 1–100 chart.FreeOpen →
Roman Numerals Converter
Class 1–8Converter - Total and best-of-5 percentage from your marksheet.FreeOpen →
Marks Percentage Calculator
Class 6–12 · CollegeCalculator - Simple interest and amount with P × R × T ÷ 100.FreeOpen →
Simple Interest Calculator
Class 6–12 · CollegeCalculator - Exact age in years, months and days as on any date.FreeOpen →
Age Calculator
Class 1–12 · CollegeCalculator - Check 75% attendance and how many classes you can miss.FreeOpen →
Attendance Calculator
Class 9–12 · CollegeChecker - Square and cube roots, simplest surd form (√72 = 6√2) and steps.FreeOpen →
Square Root Calculator
Class 6–12Calculator - Length, weight, area (gaj, guntha), temperature and more.FreeOpen →
Unit Converter
Class 1–12 · CollegeConverter - Sale price, discount percent and successive discounts.FreeOpen →
Discount Calculator
Class 6–12 · CollegeCalculator - Profit or loss percentage, cost price and selling price.FreeOpen →
Profit and Loss Calculator
Class 6–12 · CollegeCalculator - Add, subtract, multiply, divide fractions; mixed ↔ improper with steps.FreeOpen →
Fraction Calculator
Class 1–10Calculator - LCM and HCF by prime factorisation, 2 to 10 numbers.FreeOpen →
LCM and HCF Calculator
Class 1–10Calculator - Compound interest yearly, half-yearly, quarterly or monthly.FreeOpen →
Compound Interest Calculator
Class 6–12 · CollegeCalculator - SD and variance (sample and population), mean, median, mode, grouped data.FreeOpen →
Standard Deviation Calculator
Class 9–12 · CollegeCalculator - P(E), complement, two events (and / or), coins, dice and playing cards.FreeOpen →
Probability Calculator
Class 9–12Calculator - Discriminant, nature of roots, exact surd and complex roots, factorisation.FreeOpen →
Quadratic Equation Solver
Class 9–12Calculator - Is it prime? Prime factorization, factors, nearest primes, primes in a range.FreeOpen →
Prime Number Checker
Class 1–10Checker - Decimal ↔ fraction in simplest form — recurring decimals like 0.1(6) too.FreeOpen →
Decimal to Fraction Calculator
Class 1–10Converter - Powers like 2¹⁰, 2⁻³ and 8^(2/3), laws of exponents, scientific notation.FreeOpen →
Exponent Calculator
Class 6–12Calculator - Round to the nearest 10, 100, 1000, decimal places or significant figures.FreeOpen →
Rounding Off Calculator
Class 1–12Calculator - Long division the school way: bring down, subtract, remainder and decimals.FreeOpen →
Long Division Calculator
Class 1–8Calculator - Exams: JEE Main percentile or marks → likely All India Rank band.FreeOpen →
JEE Main Rank Predictor
Class 11–12Calculator - Exams: NEET UG marks → likely All India Rank band, year by year.FreeOpen →
NEET Rank Predictor
Class 11–12Calculator - Exams: KCET 50:50 merit score from CET PCM and board PCM marks.FreeOpen →
KCET Rank Predictor – Combined Score Calculator
Class 11–12Calculator - Exams: MHT CET percentile → Maharashtra state merit number band.FreeOpen →
MHT CET Rank Predictor
Class 11–12Calculator - Exams: Class 10/12 percentage — best five, JoSAA rule, 33% check.FreeOpen →
CBSE Percentage Calculator
Class 9–12Calculator - Find the CBSE or university grade for any marks.FreeOpen →
Grade Calculator
Class 6–12 · CollegeChecker - Plan chapters per day and revision before an exam.FreeOpen →
Study Time Calculator
Class 9–12 · CollegeCalculator - Live countdown to your exam: days, hours and study days.FreeOpen →
Exam Countdown
Class 9–12 · CollegeTimer - Simplify ratios, solve proportions and divide in a ratio.FreeOpen →
Ratio Calculator
Class 6–12Calculator - Mean, median, mode and range of a list of numbers.FreeOpen →
Average Calculator
Class 6–12 · CollegeCalculator
📘 CBSE & NCERT study material
Chapter-wise notes, flashcards and quizzes for Classes 1–12 — learn the concepts behind every calculator.
🎯 TalentJR Career
Preparing for placements or a government job? Check your resume’s ATS score against a job, find skill gaps and practise interviews with AI.
Why students use TalentJR calculators
Most online calculators only give you an answer. TalentJR calculators show how the answer is reached, using the same methods found in NCERT textbooks — prime factorisation for LCM, HCF and square roots, the LCM method for adding fractions, Heron’s formula for a triangle and the P×R×T/100 formula for simple interest. That makes them useful for checking homework, revising before a test and learning exam shortcuts.
Every page also lists the formulas you need, fully solved examples, and the common mistakes examiners look for. Money calculators use Indian number formatting (lakhs and crores) and rupees, the unit converter includes Indian land units such as gaj, cent and guntha, and the word counter counts Hindi and Marathi text correctly.
Frequently asked questions
Are TalentJR calculators free?
Yes. Every calculator is completely free, needs no sign-up and works on mobile, tablet and desktop.
Do the calculators show working?
Yes. Each calculator shows a step-by-step solution using the same method taught in NCERT textbooks, so students can learn the process and check their homework.
Are these useful for SSC, banking and railway exams?
Percentage, profit and loss, discount, simple and compound interest, ratio, average and LCM/HCF make up a large part of the quantitative aptitude section in SSC, IBPS, SBI and RRB exams. Each page includes exam shortcuts and solved examples.
Is my data stored?
No. All calculations run inside your browser. The numbers you enter are never sent to or stored on our servers.
How do I find the right tool?
Use the filters to narrow the list by category (student, school maths, money, everyday, writing), by class from Class 1 to college, or by type (calculator, converter, timer, checker), or type a word such as “area” or “days” in the search box.