Calculators for Students
Free calculators for students — percentages, marks, GPA, math, statistics and dates. Perfect for homework and exams.
❤️
BMI Calculator
Calculate your Body Mass Index in seconds.
％
Percentage Calculator
Find percentages, increases and decreases.
📏
Significant Figures Calculator
Count significant figures in a number and round to a chosen number of sig figs.
🎯
Percent Error Calculator
Measure how far a measured value is from the true value, as a percentage.
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Scientific Notation Converter
Convert numbers between standard decimal form and scientific (and E) notation.
🧪
Scientific Calculator
Evaluate expressions with sin, cos, log, ln, sqrt, π and e.
➕
Simple Calculator
Basic arithmetic for two numbers: add, subtract, multiply, divide.
½
Fraction Calculator
Add, subtract, multiply and divide fractions with auto-simplification.
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Quadratic Equation Solver
Solve ax² + bx + c = 0 with the quadratic formula and discriminant.
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Linear Equation Solver
Solve ax + b = 0 with full edge cases.
🧩
System of Equations Solver
Solve a 2-variable system using Cramer's rule.
x̄
Mean Calculator
Arithmetic mean (average) of a list of numbers.
📊
Median Calculator
Middle value of a sorted data set.
📶
Mode Calculator
Most frequent value(s) in a dataset.
σ
Standard Deviation Calculator
Sample or population standard deviation with mean and variance.
σ²
Variance Calculator
Sample or population variance from a data set.
↔️
Range Calculator
Range (max − min) of a numeric data set.
🎲
Probability Calculator
Probability, complement and odds for any event.
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Permutation Calculator
P(n, r) = n! / (n − r)! for ordered arrangements.
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Combination Calculator
C(n, r) = n! / (r!(n − r)!) for unordered selections.
!
Factorial Calculator
n! for any non-negative integer up to 170.
÷
GCD Calculator
Greatest Common Divisor of any list of integers.
×
LCM Calculator
Least Common Multiple of any list of integers.
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Prime Number Checker
Check whether a number is prime and show its smallest divisor.
🧮
Prime Factorization Calculator
Decompose any integer into its prime factors.
√
Square Root Calculator
√n for any real number, including imaginary results.
∛
Cube Root Calculator
Cube root ∛n for positive and negative numbers.
^
Exponent Calculator
Compute aⁿ with positive, negative and fractional exponents.
log
Logarithm Calculator
log_b(x) for any base — common, natural or custom.
⊞
Matrix Addition Calculator
Add two matrices element-wise.
⊠
Matrix Multiplication Calculator
Multiply two compatible matrices.
|A|
Matrix Determinant Calculator
Determinant of any square matrix via Gaussian elimination.
📉
Linear Regression Calculator
Best fit line y = mx + b with slope, intercept and R².
🔗
Correlation Coefficient Calculator
Pearson r with strength interpretation and R².
z
Z-Score Calculator
Standardize a value: z = (x − μ) / σ.
%
Percentile Calculator
Find the k-th percentile of any data set.