Free Math Calculators
Percentage, algebra, geometry, and statistics. All calculators are free, instant, and require no signup.
64 available
Available now
CGPA to % Calculator
Convert CGPA to percentage using the correct formula for your board / university — CBSE 10th (×9.5), Anna Univ ((CGPA-0.75)×10), VTU (10×SGPA-7.5), JNTU, Mumbai Univ, SPPU, and generic 10-point scale. Each board has a different formula.
% to CGPA Calculator
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.
SGPA to CGPA Calculator
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.
Attendance Calculator
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.
CBSE Grade Calculator
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.
VTU CGPA Calculator
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 (10×CGPA - 7.5) formula.
AKTU CGPA Calculator
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.
Anna Univ CGPA Calculator
Calculate CGPA for Anna University (Tamil Nadu engineering) using credit-weighted semester aggregation and the Anna Univ (CGPA - 0.75) × 10 percentage conversion formula.
JEE Main Rank Calculator
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.
NEET Rank Calculator
Predict NEET-UG All India Rank from marks (out of 720) using NTA-published 2024-2025 marks-to-rank data. Shows category-wise rank, percentile, qualifying status (above/below cutoff), and indicative MBBS / BDS / AYUSH college expectations.
Percentage Calculator
Calculate percentages three ways: what is X% of Y, X is what % of Y, and % change.
IELTS Band Calculator
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.
GMAT Focus Score Calculator
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.
Study Abroad Cost Calculator
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.
Fraction Calculator
Add, subtract, multiply, and divide fractions and mixed numbers with step-by-step solution.
Scientific Calculator
Full scientific calculator with trig, logarithms, powers, roots, and memory functions.
Average Calculator
Calculate mean, median, mode, and range from any list of numbers.
Std Deviation Calculator
Calculate standard deviation, variance, and summary statistics from a dataset.
Quadratic Calculator
Solve quadratic equations ax² + bx + c = 0 with step-by-step solution.
Ratio Calculator
Simplify ratios, find equivalent ratios, and solve ratio word problems.
Probability Calculator
Calculate probability of events, combinations, and permutations.
Area Calculator
Calculate area of circle, rectangle, triangle, trapezoid, and other shapes.
Volume Calculator
Calculate volume of cube, sphere, cylinder, cone, and other 3D shapes.
Triangle Calculator
Calculate triangle sides, angles, area, and perimeter with any known values.
Pythagorean Calculator
Find the hypotenuse or legs of a right triangle using the Pythagorean theorem.
LCM / GCF Calculator
Calculate the Least Common Multiple (LCM) and Greatest Common Factor (GCF) of numbers.
Random Number Calculator
Generate random numbers within any range. Single numbers, lists, or dice rolls.
Binary / Hex Calculator
Convert between binary, decimal, hexadecimal, and octal number systems.
Exponent Calculator
Calculate powers and exponents including negative exponents and fractional powers.
Logarithm Calculator
Calculate log base 10, natural log (ln), and any custom base logarithm.
Unit Converter Calculator
Convert between hundreds of units: length, weight, temperature, area, volume, speed, pressure, energy and more.
Slope Calculator
Calculate slope, y-intercept, and line equation between any two coordinate points.
Mean/Median/Mode Calculator
Calculate mean, median, mode, and range from any dataset with step-by-step solution.
Z-Score Calculator
Calculate z-score, standard score, and find what percentile a value falls in on the normal distribution.
Confidence Interval Calculator
Calculate confidence intervals for a population mean with any confidence level.
P-Value Calculator
Calculate p-value from a z-score or t-statistic for one-tailed and two-tailed hypothesis tests.
Sample Size Calculator
Calculate required sample size for surveys and experiments at any confidence level and margin of error.
Permutation & Combo Calculator
Calculate nPr permutations and nCr combinations for any n and r values.
Circle Calculator
Calculate area, circumference, diameter, and radius of a circle from any one known value.
Surface Area Calculator
Calculate surface area of sphere, cylinder, cone, cube, and rectangular prism.
Right Triangle Calculator
Calculate all sides and angles of a right triangle from any two known values.
Square Root Calculator
Calculate square root, cube root, and nth root of any number.
GCF Calculator
Calculate the Greatest Common Factor of two or more numbers with prime factorization steps.
Factor Calculator
Find all factors of any number, identify prime factors, and check primality.
Rounding Calculator
Round numbers to any decimal place, nearest integer, or significant figures.
Long Division Calculator
Calculate long division step-by-step, showing quotient and remainder.
Prime Factorization Calculator
Find the prime factorization of any number with step-by-step factor tree.
Scientific Notation Calculator
Convert numbers to and from scientific notation. Add, subtract, multiply in scientific notation.
Distance Formula Calculator
Calculate distance between two points on a coordinate plane using the distance formula.
Percent Error Calculator
Calculate percent error between experimental and theoretical values in science experiments.
Half-Life Calculator
Calculate radioactive decay, remaining quantity, and elapsed time using half-life formula.
Hex Calculator Calculator
Perform arithmetic operations directly in hexadecimal — add, subtract, multiply hex numbers.
Matrix Calculator
Add, subtract, multiply 2×2 and 3×3 matrices, and find determinant and transpose.
Descriptive Statistics Calculator
Calculate mean, median, mode, quartiles, IQR, variance, standard deviation, and skewness.
Number Sequence Calculator
Find the next terms and sum of arithmetic and geometric sequences from any starting values.
Factorial / Big Numbers Calculator
Calculate factorials of large numbers, permutations, and combinations with exact results.
Common Factors Calculator
Find all common factors between two or more numbers, including the Greatest Common Factor.
Speed / Distance / Time Calculator
Calculate speed, distance, or time from any two known values.
Density Calculator
Calculate density, mass, or volume from any two known values using density = mass / volume.
Ohm's Law Calculator
Calculate voltage, current, resistance, or power using Ohm's Law (V = IR).
Resistor Color Code Calculator
Decode resistor color bands to find resistance value, tolerance, and power rating.
Voltage Drop Calculator
Calculate voltage drop in electrical wiring based on wire gauge, length, and current draw.
Molarity Calculator
Calculate molarity, moles of solute, or volume of solution for any chemical.
Molecular Weight Calculator
Calculate molar mass of chemical compounds from a chemical formula (e.g., H₂O, NaCl).
About our math calculators
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.