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Education Calculators

GPA calculators, grade trackers, and academic tools. 67 free calculators — no sign-up required.

Axis of Symmetry Calculator

Find the axis of symmetry and vertex of a quadratic function from standard form ax² + bx + c.

Quadratic Maximum and Minimum Calculator

Find the maximum or minimum value of a quadratic function using the vertex.

Polynomial End Behavior Calculator

Analyze polynomial end behavior from the degree and leading coefficient.

Polynomial Degree Calculator

Find the degree, leading term, and leading coefficient of a polynomial expression.

Leading Coefficient Test Calculator

Apply the leading coefficient test to predict polynomial end behavior.

Triangle Missing Angle Calculator

Find the missing interior angle of a triangle when two angles are known.

Isosceles Triangle Calculator

Calculate height, area, perimeter, and angles of an isosceles triangle from equal side and base.

Equilateral Triangle Calculator

Calculate side, height, area, perimeter, and angles of an equilateral triangle from one known value.

Right Triangle Altitude Calculator

Find the altitude to the hypotenuse of a right triangle from the two legs.

Triangle Inequality Calculator

Check whether three side lengths form a triangle or find the possible range for a missing third side.

Law of Sines Calculator

Solve non-right triangle side and angle problems using the Law of Sines, with step-by-step proportions and ambiguous-case notes.

Law of Cosines Calculator

Solve SAS and SSS triangle problems using the Law of Cosines, with side, angle, and validity checks shown step by step.

Ambiguous Case SSA Calculator

Determine whether an SSA triangle has no solution, one solution, or two solutions, then solve the possible triangles with Law of Sines steps.

Radian to Degree Calculator

Convert degrees to radians and radians to degrees, with exact π-form notes, decimal answers, and common angle examples.

Middle School GPA Calculator

Calculate middle school GPA without credit hours. Supports letter grades, percentages, and grade points. Track cumulative GPA across all semesters, set grade goals, and see how your GPA compares. Built for 6th, 7th, and 8th grade students and parents.

Unit Circle Coordinates Calculator

Find unit circle coordinates, sine, cosine, tangent, quadrant, normalized angle, and reference angle from degrees or radians.

Arc Length Calculator

Calculate the arc length of a circle from radius and central angle, with degree/radian conversion, chord length, and step explanation.

High School GPA Calculator

Calculate weighted and unweighted high school GPA simultaneously. Supports Regular, Honors, AP, IB, and Dual Enrollment courses with credit hours. Track cumulative GPA across all 4 years, set grade goals, and see which college tiers your GPA matches.

Oakland University GPA Calculator

Calculate semester and cumulative GPA using Oakland University's official grading scale. Includes OU academic standing thresholds, Dean's List check, goal calculator, and S/U grade guidance. Built for undergraduate and graduate OU students.

Sector Area Calculator

Calculate sector area from radius and central angle, with arc length, sector perimeter, degree/radian conversion, and examples.

Central Angle Calculator

Find a circle central angle from arc length, sector area, or chord length, with radians, degrees, and formula steps.

Calculate semester GPA, cumulative GPA, high school weighted and unweighted GPA, and grade goals all in one place. Supports letter grades, percentages, and credit hours. Updates live as you type.

GPA Calculator for Sri Lanka

Calculate SGPA and CGPA using Sri Lanka's UGC grading scale with marks or letter grades. See your degree classification — First Class, Second Upper, Second Lower, or Pass — after every calculation. Includes a goal calculator for reaching your target class.

Inscribed Angle Calculator

Calculate an inscribed angle, intercepted arc, or related central angle using the inscribed angle theorem with clear steps.

Similar Triangles Calculator

Solve similar-triangle proportions, find missing corresponding sides, check side-ratio similarity, and calculate scale factor with steps.

Z Score Step-by-Step Calculator

Calculate a z score from a raw score, mean, and standard deviation with formula steps and normal-area interpretation.

Empirical Rule Calculator

Calculate 68-95-99.7 rule intervals from a mean and standard deviation.

Chebyshev’s Theorem Calculator

Calculate Chebyshev minimum percentages and intervals for any distribution.

Normal Distribution Range Calculator

Find the probability between two values in a normal distribution with z-score steps.

Binomial Probability Step-by-Step Calculator

Calculate exact, at most, at least, and between binomial probabilities with steps.

Geometric Probability Distribution Calculator

Calculate geometric probabilities for trials until first success or failures before first success.

Permutation and Combination Difference Calculator

Compare permutations and combinations and learn when order matters.

Conditional Probability Calculator

Calculate P(A|B), P(B|A), and check independence from probabilities.

Bayes Theorem Student Calculator

Calculate posterior probability using Bayes theorem with prior, likelihood, and false-positive probability.

Expected Value Calculator

Calculate expected value, variance, and standard deviation from a discrete probability table.

Elimination Method Calculator

Solve a system of two linear equations using the elimination method, with step-by-step work, system classification, and answer checking.

Inequality Interval Notation Calculator

Convert inequalities to interval notation, including linear inequalities, bounded intervals, outside intervals, brackets, parentheses, and number line descriptions.

Compound Inequality Calculator

Solve compound inequalities joined by AND or OR, then convert the answer to interval notation with number-line guidance.

Absolute Value Equation Calculator

Solve absolute value equations in the form A|Bx+C|+D=E with step-by-step branches, checks, and no-solution detection.

Absolute Value Inequality Calculator

Solve absolute value inequalities with less-than and greater-than cases, compound inequalities, interval notation, and number-line descriptions.

Midpoint Formula Calculator

Find the midpoint between two coordinate points with step-by-step work. Includes distance, slope, formula explanation, examples, and common midpoint mistakes.

Distance Formula Calculator

Calculate the distance between two coordinate points using the distance formula. Includes step-by-step substitution, distance squared, examples, and common mistakes.

Slope Intercept Form Calculator

Convert slope and intercept, two points, or standard form into slope-intercept form. Includes steps, intercepts, examples, and line-form explanations.

Point Slope Form Calculator

Build point-slope form from a point and slope or two points. Includes slope-intercept form, standard form, steps, examples, and vertical-line notes.

Arithmetic Sequence Calculator

Find arithmetic sequence terms, common difference, explicit formula, recursive formula, and the sum of the first n terms with step-by-step work.

Geometric Sequence Calculator

Find geometric sequence terms, common ratio, explicit formula, finite sum, and infinite sum checks with step-by-step work.

Nth Term Calculator

Detect arithmetic, geometric, and quadratic sequence patterns and calculate the nth term with steps, formulas, and generated terms.

Arithmetic Series Sum Calculator

Calculate the sum of an arithmetic series from first term, common difference, number of terms, or first and last term with steps.

Significant Figures Calculator

Count significant figures and round numbers to a chosen number of sig figs. Includes rules, examples, scientific notation, and lab-report guidance.

Empirical Formula Calculator

Calculate empirical formulas from percent composition or element masses. Includes mole ratios, multiplier, empirical formula mass, molecular formula option, and examples.

Geometric Series Sum Calculator

Calculate finite and infinite geometric series sums with convergence checks, formulas, examples, and step-by-step work.

Recursive Formula Calculator

Write recursive formulas for arithmetic and geometric sequences from entered terms, with explicit formula comparison and step-by-step work.

Explicit Formula Calculator

Find explicit formulas for arithmetic and geometric sequences from terms, with nth-term output and recursive formula comparison.

Kinematic Equations Calculator

Solve constant-acceleration kinematic equations for initial velocity, final velocity, acceleration, time, and displacement with steps and examples.

Factor by Grouping Calculator

Factor four-term polynomials by grouping with step-by-step GCF extraction and common-binomial checks.

Difference of Squares Calculator

Factor expressions in the form Ax² − B using the difference of squares pattern with step-by-step checks.

Perfect Square Trinomial Calculator

Check and factor perfect square trinomials in the form Ax² + Bx + C with step-by-step pattern tests.

Sum and Difference of Cubes Calculator

Factor expressions using the sum of cubes and difference of cubes patterns with step-by-step explanations.

Rational Expression Simplifier Calculator

Simplify rational expressions by factoring, cancelling common factors, and keeping denominator restrictions.

Rational Equation Calculator

Solve rational equations with cross multiplication, denominator restrictions, and extraneous solution checks.

Complex Fraction Simplifier Calculator

Simplify complex fractions and complex rational expressions by multiplying by the reciprocal and tracking restrictions.

Function Composition Calculator

Find f(g(x)), g(f(x)), and evaluated composite values for linear and quadratic polynomial functions.

Inverse Function Calculator

Find inverse functions for linear, fractional linear, and restricted quadratic functions with one-to-one condition notes.

Domain and Range Calculator

Find the domain and range for quadratic, rational, and square root functions with interval notation and explanations.

Piecewise Function Calculator

Evaluate piecewise functions by selecting the correct interval and applying the matching function rule.

Vertex Form Calculator

Convert quadratic functions from standard form to vertex form and identify the vertex, axis, and maximum or minimum.

Quadratic Discriminant Calculator

Calculate the discriminant of a quadratic equation and classify the number and type of solutions.