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Percentage, algebra, geometry, and statistics. All calculators are free, instant, and require no signup.
64 available
Convert CGPA to percentage using the correct formula for your board / university — CBSE 10th (×9.5), Anna Univ (CGPA×10), VTU (scheme-specific), JNTU, Mumbai Univ, SPPU, and generic 10-point scale. Each board has a different formula.
Convert percentage to CGPA using the reverse formula for your board / university — CBSE 10th (÷9.5), Anna Univ, VTU, JNTU, Mumbai Univ, SPPU. Each board uses a different conversion — this calc picks the right one.
Calculate cumulative CGPA across multiple semesters from individual SGPAs. Supports credit-weighted aggregation (semesters can have different credit weights). Used by engineering / B.Tech / M.Tech students at every Indian university.
Calculate your current attendance percentage and find out how many classes you can skip while staying above the 75% rule (or any custom threshold). Also shows how many classes you'd need to attend to recover from low attendance.
Convert CBSE Class 10 / 12 board exam marks to the 9-point grade scale (A1 / A2 / B1 / B2 / C1 / C2 / D / E1 / E2). Used for the CBSE result format that shows letter grades alongside percentage marks.
Calculate Cumulative Grade Point Average for VTU (Visvesvaraya Technological University, Karnataka) using credit-weighted multi-semester aggregation. Includes per-semester SGPA + final CGPA-to-percentage via VTU's scheme-aware formula (CGPA×10 for 2021/2022 schemes; (CGPA×10)−7.5 for 2015-2018 schemes).
Calculate CGPA for AKTU (Dr. APJ Abdul Kalam Technical University, UP) — formerly UPTU — with credit-weighted semester aggregation and the AKTU (CGPA × 10) - 7.5 percentage conversion formula.
Calculate CGPA for Anna University (Tamil Nadu engineering) using credit-weighted semester aggregation and the Anna Univ (CGPA - 0.5) × 10 percentage conversion formula.
Predict your JEE Main All India Rank from percentile or NTA Score using NTA-published normalization data. Shows category-wise ranks (General / OBC-NCL / SC / ST / EWS / PwD) + indicative college expectation tiers.
Predict NEET-UG All India Rank from marks (out of 720) using NTA-published 2025 marks-to-rank data. Shows category-wise rank, percentile, qualifying status (above/below cutoff), and indicative MBBS / BDS / AYUSH college expectations.
Calculate percentages three ways: what is X% of Y, X is what % of Y, and % change.
Calculate IELTS overall band score from 4 section scores (Listening / Reading / Writing / Speaking). Uses British Council / IDP rounding rules (>0.25 rounds up to .5, >0.75 rounds up to next whole). Supports both Academic + General Training scales.
Calculate GMAT Focus Edition total score (205-805) from 3 section scores (Quantitative / Verbal / Data Insights). Includes percentile lookup based on official Q1 2025 GMAC distribution data.
Calculate total cost of studying abroad — tuition + living + visa + flights + insurance — across top destinations (US / UK / Canada / Australia / Germany / Ireland / Singapore). Includes USD-INR conversion + education loan EMI projection.
Add, subtract, multiply, and divide fractions and mixed numbers with step-by-step solution.
Full scientific calculator with trig, logarithms, powers, roots, and memory functions.
Calculate mean, median, mode, and range from any list of numbers.
Calculate standard deviation, variance, and summary statistics from a dataset.
Solve quadratic equations ax² + bx + c = 0 with step-by-step solution.
Simplify ratios, find equivalent ratios, and solve ratio word problems.
Calculate probability of events, combinations, and permutations.
Calculate area of circle, rectangle, triangle, trapezoid, and other shapes.
Calculate volume of cube, sphere, cylinder, cone, and other 3D shapes.
Calculate triangle sides, angles, area, and perimeter with any known values.
Find the hypotenuse or legs of a right triangle using the Pythagorean theorem.
Calculate the Least Common Multiple (LCM) and Greatest Common Factor (GCF) of numbers.
Generate random numbers within any range. Single numbers, lists, or dice rolls.
Convert between binary, decimal, hexadecimal, and octal number systems.
Calculate powers and exponents including negative exponents and fractional powers.
Calculate log base 10, natural log (ln), and any custom base logarithm.
Convert between hundreds of units: length, weight, temperature, area, volume, speed, pressure, energy and more.
Calculate slope, y-intercept, and line equation between any two coordinate points.
Calculate mean, median, mode, and range from any dataset with step-by-step solution.
Calculate z-score, standard score, and find what percentile a value falls in on the normal distribution.
Calculate confidence intervals for a population mean with any confidence level.
Calculate p-value from a z-score or t-statistic for one-tailed and two-tailed hypothesis tests.
Calculate required sample size for surveys and experiments at any confidence level and margin of error.
Calculate nPr permutations and nCr combinations for any n and r values.
Calculate area, circumference, diameter, and radius of a circle from any one known value.
Calculate surface area of sphere, cylinder, cone, cube, and rectangular prism.
Calculate all sides and angles of a right triangle from any two known values.
Calculate square root, cube root, and nth root of any number.
Calculate the Greatest Common Factor of two or more numbers with prime factorization steps.
Find all factors of any number, identify prime factors, and check primality.
Round numbers to any decimal place, nearest integer, or significant figures.
Calculate long division step-by-step, showing quotient and remainder.
Find the prime factorization of any number with step-by-step factor tree.
Convert numbers to and from scientific notation. Add, subtract, multiply in scientific notation.
Calculate distance between two points on a coordinate plane using the distance formula.
Calculate percent error between experimental and theoretical values in science experiments.
Calculate radioactive decay, remaining quantity, and elapsed time using half-life formula.
Perform arithmetic operations directly in hexadecimal — add, subtract, multiply hex numbers.
Add, subtract and multiply 2×2 matrices, and find the determinant and trace.
Calculate mean, median, mode, quartiles, IQR, variance, standard deviation, and skewness.
Find the next terms and sum of arithmetic and geometric sequences from any starting values.
Calculate the exact factorial (n!) of large integers up to 170 using arbitrary-precision BigInt arithmetic, with digit count and Stirling estimate.
Find all common factors between two or more numbers, including the Greatest Common Factor.
Calculate speed, distance, or time from any two known values.
Calculate density, mass, or volume from any two known values using density = mass / volume.
Calculate voltage, current, resistance, or power using Ohm's Law (V = IR).
Decode resistor color bands to find resistance value, tolerance, and power rating.
Calculate voltage drop in electrical wiring based on wire gauge, length, and current draw.
Calculate molarity, moles of solute, or volume of solution for any chemical.
Calculate molar mass of chemical compounds from a chemical formula (e.g., H₂O, NaCl).
Maths shows up everywhere — in homework, in competitive-exam prep, at work, and in daily life when you split a bill or work out a discount. Our math calculators cover the full range, from basic percentages, fractions, and ratios to algebra, geometry, trigonometry, statistics, and number theory. Each one shows the steps or the formula it used, so they double as a learning aid, not just an answer machine.
Students preparing for CBSE, ICSE, and state boards, or for JEE, NEET, and other competitive exams, use these tools to check their working and build intuition: the percentage, average, LCM and HCF, quadratic equation, standard deviation, and probability calculators are among the most popular. Professionals and everyday users reach for the percentage, scientific, and unit-style tools to get quick, reliable answers without hunting for the right formula.
All math calculators are free, instant, and work on any device with no signup. They are built for accuracy — formulas are implemented carefully and the common edge cases are handled — but they are meant to support your understanding, not replace it. Use them to verify answers, explore how changing one value changes the result, and learn the method behind each calculation so you can do it yourself when it counts, such as in an exam hall.