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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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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Army Promotion Points Calculator (US)US Army promotion points calculator for Sergeant (E-5) and Staff Sergeant (E-6). Add weapons, ACFT, awards, education and training points, capped at 800.
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ACT Superscore CalculatorCalculate your ACT superscore (US) from your best English, Math, Reading, and Science section scores across all test dates. Free and instant.
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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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Multiples of a Number CalculatorGenerate the first 100 multiples of any positive integer, optionally only those strictly greater than a minimum value. Fast, accurate, comma-separated list.
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ACFT Sprint-Drag-Carry (SDC) Score CalculatorConvert your Army Combat Fitness Test Sprint-Drag-Carry time into a 0-100 ACFT point score (US Army). 60 points to pass, 100 at 1:33.
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Cranes and Tortoises Problem CalculatorSolve the classic cranes-and-tortoises (tsurukamezan) word problem. Enter total heads and total legs to find how many cranes and tortoises there are.
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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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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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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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pH CalculatorCalculate pH from hydrogen ion concentration [H⁺], or find [H⁺] from pH. Get pOH, [OH⁻], and whether a solution is acidic, neutral, or basic.
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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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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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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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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.
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.
