Solve fractions, percentages, quadratic equations, geometric areas and volumes, and calculate GPA and grades.
Free online four-function desktop calculator with memory (M+, M-, MR, MC), percent, square root, and keyboard support.
Full mathematical expression evaluator supporting brackets, powers, scientific notation, and calculation audit log.
Advanced scientific calculator with trigonometry, logarithms, roots, powers, factorials, radian/degree toggle, and physical constants.
Solve right triangle sides (a² + b² = c²), hypotenuse, angles, area, perimeter, and simplified radical expressions.
Calculate semester and cumulative GPA on 4.0 unweighted and 5.0 weighted scales (AP, IB, Honors) with honors projections.
Calculate weighted class grades and determine the exact score needed on your final exam to earn your target letter grade.
Add, subtract, multiply, and divide fractions and mixed numbers with step-by-step LCD, GCD, and simplified answers.
Calculate single event odds, two-event union & intersection (P(A ∪ B), P(A ∩ B)), and permutations & combinations (nPr, nCr).
Calculate area, perimeter, and circumferences for rectangles, circles, triangles, trapezoids, ellipses, and regular polygons.
Calculate volume, surface area, and fluid capacity (liters, gallons) for boxes, cylinders, spheres, cones, pyramids, and capsules.
Evaluate statistical significance, conversion uplift, z-score, p-value, and confidence intervals for split tests.
Solve linear absolute value inequalities (|ax + b| < c, > c) step-by-step with interval notation and graphical number line.
Find global maximum and minimum values of functions on closed intervals [a, b] using the Extreme Value Theorem.
Compute numerical derivatives (f’, f’’), tangent lines, and definite integrals via Simpson’s rule with high precision.
Calculate composite scores and predict 1–5 AP Biology exam grades from Multiple Choice and Free Response (FRQ) raw points.
Predict your AP Euro exam score (1–5) from Multiple Choice, Short Answer (SAQ), DBQ, and Long Essay (LEQ) scores.
Calculate APES composite scores and predict 1–5 exam grades from 80 Multiple Choice questions and 3 FRQ essays.
Learn Japanese Soroban abacus bead representation, mental math (Anzan), and calculate numbers interactively.
Calculate Golden Ratio proportions (φ ≈ 1.618), harmonic design scales, layout splits, and typography hierarchies.
Percentage change = [(New Value - Original Value) / Original Value] × 100. A positive result indicates percentage growth; a negative result represents a discount or decrease.
GPA multiplies the grade point value of each letter grade (e.g., A = 4.0, B = 3.0) by course credit hours, sums total grade points, and divides by total attempted credits.
Yes. The scientific calculator supports sin, cos, tan, inverse trig, natural log (ln), log base 10, radians and degrees mode, and exponents.
Our fraction engine automatically converts mixed fractions into improper fractions, finds the lowest common denominator (LCD), executes the arithmetic, and simplifies to lowest terms.