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Accurate tools for students and professionals — no downloads, no sign-up, always free.
APUSH Score Calculator
Calculate your AP US History exam score instantly. Enter MCQ, SAQ, DBQ & LEQ scores — get your 1–5 result in real time.
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Calculator Bacalaureat
Calculate your Romanian Bacalaureat final grade using the official formula — instant pass/fail result.
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Ratio Calculator
Simplify ratios, solve proportions, split totals & convert to %. Supports 2 and 3-part ratios with step-by-step solutions.
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Percentage Increase Calculator
Find % change between two numbers, calculate new value, or find original value — step-by-step formula with salary & price examples.
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Semester Grade Calculator
Calculate your weighted semester grade instantly. Add grading categories, enter scores — get your current grade and what you need on remaining work.
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Racine Carrée Calculator
Find the square root of any number — step-by-step solution in French & English plus simplified radical form.
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AP World Score Calculator
Calculate your AP World History: Modern exam score instantly. Enter MCQ, SAQ, DBQ & LEQ scores — get your 1–5 result in real time.
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AP Physics 1 Score Calculator
Predict your AP Physics 1 score instantly. Updated for 2025 redesigned exam — 40 MCQ + 4 FRQ types with weakest section detector.
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Half Birthday Calculator
Find your exact half birthday date instantly — 6 months from your birthday. Perfect for half-birthday parties and celebrations.
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AP Calculus AB Score Calculator
Calculate your AP Calculus AB exam score instantly. Enter MCQ & FRQ scores — get your predicted 1–5 AP score with weakest-section insight.
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AP Biology Score Calculator
Predict your AP Biology exam score instantly. Enter MCQ and FRQ points — get your predicted 1–5 AP score with full section breakdown.
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Percentage Increase Calculator
Find % change between two numbers, calculate new value, or find original value — step-by-step formula with salary & price examples.
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Lagrange Calculator
Free Lagrange interpolation calculator — basis polynomials, step-by-step & curve chart. 2–8 data points. No login needed.
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Midpoint Calculator
Find the midpoint between two points instantly. Step-by-step solution, distance & visual graph — works for 2D and 3D coordinates.
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Fraction Calculator
Add, subtract, multiply and divide fractions instantly. Supports mixed numbers, simplification & decimal conversion — with step-by-step solution.
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Cumulative GPA Calculator
Calculate your college or high school GPA instantly. Add multiple semesters, include previous GPA — with Dean's List status and full breakdown.
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AP Chemistry Score Calculator
Predict your AP Chemistry exam score instantly. Enter MCQ and per-question FRQ scores — get your 1–5 AP score with weakest section detector.
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AP Psychology Score Calculator
Calculate your AP Psychology exam score instantly. Enter MCQ, AAQ & EBQ scores — get your predicted 1–5 AP score with weakest-section insight.
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IB Predicted Grade Calculator
Predict your IB Diploma score out of 45. Enter 6 subject grades, TOK & EE — with diploma pass/fail check and university context.
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Class Rank Percentile Calculator
Convert your class rank to percentile instantly. Find top percent, quartile, college admissions standing & what rank you need for Top 10%.
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AP Human Geography Score Calculator
Calculate your AP Human Geo score instantly. Enter MCQ & FRQ scores — get your predicted 1–5 score with command verb guide.
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AP Microeconomics Score Calculator
Predict your AP Micro exam score instantly. Enter MCQ and FRQ scores — get your 1–5 score with graph tips and weakest section detector.
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Final Exam Grade Calculator
Find exactly what grade you need on your final exam. Letter grade, difficulty rating, scenario table, and grade drop warning — instant results.
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Weighted GPA Calculator
Calculate weighted and unweighted GPA instantly. Supports AP, IB, and Honors courses with quality points breakdown and college admissions context.
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Proportion Calculator
Solve missing proportion values, check direct and inverse proportions, and verify proportions — step-by-step cross-multiplication.
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GCF and LCM Calculator
Find GCF and LCM of 2 or 3 numbers instantly with step-by-step prime factorization, Euclidean algorithm, and relationship formula.
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Mean, Median, Mode Calculator
Find 7 statistics instantly — mean, median, mode, range, variance & std dev with step-by-step solutions and frequency chart.
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Pythagorean Theorem Calculator
Find hypotenuse, missing leg, or verify right triangle — with live visual, angles, area, perimeter & step-by-step solutions.
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Prime Factorization Calculator
Find prime factors, factor tree, all divisors, GCF & LCM with step-by-step division and exponential notation. Supports up to 3 numbers.
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Slope Calculator
Find slope, angle, grade & line equation from two points — with live graph and grade classification.
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Standard Deviation Calculator
Find population & sample SD, variance, CV & Z-score — with bell curve visualization and step-by-step solutions.
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Long Division Calculator
Visual long division with color-coded DMSB steps, remainder as fraction, decimal continuation & auto-verification. Homework helper for students.
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Quadratic Equation Calculator
Solve ax²+bx+c=0 — roots, vertex, discriminant & parabola graph using formula, factoring & completing the square. All free with steps.
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Circle Calculator
Area, circumference, diameter & radius from any value — plus sector area, arc length, chord, unit conversion and live circle visual.
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Long Division Calculator
Visual long division with color-coded DMSB steps, remainder as fraction, decimal continuation & auto-verification. Homework helper for students.
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4 Function Calculator
Add, subtract, multiply and divide online — with history, keyboard support, percentage, and step-by-step results. Fast and free.
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Integer Calculator
Free integer calculator with steps — 10 operations including GCD, LCM, modulo, power, factorial & absolute value. Negative integers supported.
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MAD Calculator
Mean Absolute Deviation with steps — deviation table, dot plot, interpretation & 5 presets. Perfect for 6th & 7th grade math. Free.
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Lagrange Calculator
Free Lagrange interpolation calculator — basis polynomials, step-by-step & curve chart. 2–8 data points. No login needed.
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