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Free maths calculators with step-by-step solutions
CGPA, marks percentage, attendance, percentage, interest, fractions, LCM & HCF and more — each with the full working, formulas and solved examples. Built for CBSE students, parents and anyone preparing for SSC, banking or railway exams.
Student Calculators
CGPA, marks percentage, grades, attendance, study planning and exam countdowns — everything a student checks every term.
CGPA Calculator
Convert CBSE CGPA to percentage (× 9.5), percentage to CGPA, and calculate university CGPA from semester SGPAs and credits.
Open calculator →Marks Percentage Calculator
Calculate your overall percentage of marks across subjects, plus best-of-5 percentage for CBSE and state boards.
Open calculator →Grade Calculator
Convert marks into a grade and grade point on the CBSE A1–E scale or the UGC university O–F scale, and see how many marks you need for the next grade..
Open calculator →Attendance Calculator
Check your attendance percentage, how many classes you can miss and still stay above 75%, or how many classes you must attend to get back to 75%..
Open calculator →Study Time Calculator
Plan exam preparation: enter your exam date, chapters and daily study hours to see chapters per day, hours per chapter and when to start revision..
Open calculator →Exam Countdown
Live countdown to your exam in days, hours, minutes and seconds.
Open calculator →Percentage Calculator
Free percentage calculator: find X% of Y, what percent one number is of another, percentage increase/decrease and change — with step-by-step working..
Open calculator →Age Calculator
Calculate exact age in years, months and days from date of birth, as on today or any date.
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Money & Commercial Maths
Percentages, profit, discounts and interest — for shopping, business and exams.
Percentage Calculator
Free percentage calculator: find X% of Y, what percent one number is of another, percentage increase/decrease and change — with step-by-step working..
Open calculator →Profit and Loss Calculator
Calculate profit, loss, profit % and loss % from cost price and selling price, or find CP or SP from a given profit %.
Open calculator →Discount Calculator
Find the final price after a discount, how much you save, and the discount percentage from MRP and sale price.
Open calculator →Simple Interest Calculator
Calculate simple interest and total amount from principal, rate and time in years, months or days.
Open calculator →Compound Interest Calculator
Calculate compound interest and maturity amount with yearly, half-yearly, quarterly or monthly compounding.
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School Maths (NCERT)
Fractions, ratios, LCM/HCF and averages with full working, like your textbook.
Fraction Calculator
Add, subtract, multiply and divide fractions and mixed numbers.
Open calculator →Ratio Calculator
Simplify ratios like 12:18 or 1.5:2.25, solve proportions (a:b = c:x) and divide an amount in a given ratio such as 2:3:5.
Open calculator →LCM and HCF Calculator
Find the LCM and HCF (GCD) of 2 to 10 numbers with prime factorisation steps, exactly as in NCERT Class 6 and Class 10.
Open calculator →Average Calculator
Paste a list of numbers to find the average (mean), sum, count, median, mode and range instantly.
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Everyday Utilities
Quick converters and date tools you will use again and again.
Age Calculator
Calculate exact age in years, months and days from date of birth, as on today or any date.
Open calculator →Unit Converter
Convert length, weight, temperature, area (acre, gaj, guntha, hectare), volume, speed, time and data units instantly, with Indian units and formulas..
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📘 CBSE & NCERT study material
Chapter-wise notes, flashcards and quizzes for Classes 1–12 — learn the concepts behind every calculator.
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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 and HCF, the LCM method for adding fractions, 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, and the unit converter includes Indian land units such as gaj, cent and guntha.
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.