Educational calculators help students, teachers, and applicants with grades and scores — exam and GPA marks, test-score conversions, and study planning. Popular tools include the Marks Percentage Calculator, IELTS Score Calculator, MELD Score Calculator, and grade-point tools used around the world.
Pick the tool that matches your exam or grading system below, or open the Trending tab to see what's in demand this week. Everything is free and works on any device.
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Semi-Infinite Interval Integration by Double-Exponential (DE) FormulaCompute the integral of f(x) over [a, infinity) using Double-Exponential (DE) quadrature for algebraically-decaying integrands. Universal numerical method.
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Age Multiples Word Problem CalculatorSolve the classic age word problem: a parent is n times the child's age now and m times after some years. Instantly find both current ages.
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Classes You Can Skip CalculatorFree bunk calculator: find how many classes you can skip while staying above your required attendance percentage. Enter attended, total and required %.
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IELTS to GPA Conversion CalculatorConvert percentage marks to CGPA on a 10-point scale instantly. Uses the standard CGPA = Percentage / 9.5 formula for Indian universities (CBSE/AICTE).
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Cricket Batting Average and Economy Rate CalculatorCalculate a bowler's economy rate by dividing runs conceded by overs bowled. Instantly see runs per over and runs per ball for any cricket match.
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GPA to Letter Grade CalculatorConvert a percentage score to a letter grade (A, B, C, D, F) and 4.0 GPA equivalent using the standard 10-point US grading scale.
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Odds Ratio CalculatorScore the 21-item Beck Depression Inventory (BDI-II). Add each item (0-3) for a total of 0-63 and see your severity band: minimal, mild, moderate or severe.
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Tennis Rating (UTR-Style) CalculatorCalculate win percentage from a sports win-loss record. Supports ties using the standard (Wins + 0.5×Ties) / Games formula. Free and instant.
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WAIS-Style IQ Score Calculator (Deviation IQ, Mean 100 · SD 15)Convert a raw test score into a deviation IQ score using IQ = 100 + 15(x − μ)/σ. Get your z-score, percentile, and classification instantly.
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Cricket Partnership Run Rate CalculatorFree cricket run rate calculator. Enter runs scored and overs bowled to get runs per over (RPO) instantly, plus a projected 50-over score.
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IELTS Score CalculatorEnter Listening, Reading, Writing and Speaking band scores, choose Academic or General Training, and get your overall IELTS band and level instantly.
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Golf Handicap CalculatorCalculate your golf handicap differential and estimated handicap index from your score, course rating and slope rating using the standard formula.
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Grade CalculatorFree weighted grade calculator. Enter each assignment's score and weight to find your final grade as a weighted average percentage instantly.
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Logarithm CalculatorFree logarithm calculator. Compute log base 10, natural log (ln), log base 2, or any custom base using log_b(x) = ln(x)/ln(b). Instant results.
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Compound Interest CalculatorCompute compound interest with the formula A = P(1 + r/n)^(nt). Enter principal, rate, compounding frequency and years to find future value and interest.
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Weighted Average Grade CalculatorCalculate your weighted average grade by entering each grade and its weight. Free, fast tool for students using weighted GPA or course mark schemes.
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Speed, Distance & Time CalculatorFree Speed, Distance & Time calculator. Solve for speed, distance, or time using d = s × t. Supports km, miles, meters, hours, minutes & seconds.
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BMI Category Score CalculatorCalculate your BMI (Body Mass Index) from weight and height in metric units and instantly see your category: underweight, normal, overweight or obese.
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Grade Percentage Needed CalculatorFind the average score you need on the remaining work to hit your target final grade, based on your current grade and weight completed.
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Marks Needed to Reach Target Percentage CalculatorFind out how many more marks you need to hit your target percentage. Enter your target %, total marks, and current score to get the answer instantly.
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Percentage of Questions Correct CalculatorCalculate your test score percentage from the number of questions correct out of the total. Instant grade percentage with correct and incorrect counts.
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Test Score Percentage CalculatorCalculate your test score percentage instantly. Enter correct answers and total questions to see your grade percentage, correct and incorrect counts.
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K/D Ratio CalculatorCalculate your K/D (kill/death) ratio and KDA from kills, deaths, and assists. Free gaming stats calculator for FPS and MOBA players.
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Win Rate CalculatorCalculate your win rate percentage from games won and lost. Free win rate calculator for gaming, esports, sports and competitive stats.
Frequently asked questions
What can I calculate with these educational tools?
Grades and percentages, GPA and weighted marks, standardized-test scores (such as IELTS), pass marks, and study or attendance planning.
Do the tools match my country's grading system?
Grading scales differ by country and institution. Choose the calculator built for your system where available, and always check the result against your school's official rules.
Are they free to use?
Yes — free, no sign-up, and they work on any device.
How accurate are the score results?
They apply the published formula for each grading scheme, but official results can include rounding or weighting rules specific to your institution — treat these as estimates.
Which educational calculators are most popular?
The list is ordered by usage, most popular first; the Trending, Recently added, and Last updated tabs show what's new and rising.
