Education calculators
Final grades, GPAs, weighted marks, and ACT targets. Every tool shows its formula, updates live, and works on any device.
Saved & recent
- Chemistry CalculatorStoichiometry, solutions, pH, and gas laws in one chemistry calculator: moles from mass, Avogadro’s number, molarity, dilutions, pH and pOH, percent yield and composition, limiting reactant, and PV = nRT — pick the formula from the dropdown.→
- Cumulative GPA CalculatorMerge your prior transcript with this term’s results to get the new cumulative GPA, the shift, total credits, and where you stand on typical honors cutoffs.→
- Final Grade CalculatorEnter your current grade, the final’s weight, and your target course grade to see the exact score you need on the final, with what-if lines for other targets.→
- Geometry CalculatorEvery common geometry formula in one tool: areas, volumes, perimeters, diagonals, the Pythagorean theorem, distance and midpoint — pick a shape from the dropdown.→
- GPA CalculatorFour courses in, one GPA out: letter grades and credit hours combine into quality points on the unweighted 4.0 scale, with every step of the arithmetic shown.→
- Physics CalculatorEvery core physics formula in one tool: F = ma, kinematics, kinetic and potential energy, momentum, circular motion, waves, Ohm’s law, and heat — pick a formula from the dropdown and see it solved with your numbers.→
- Statistics CalculatorEvery everyday statistic in one dropdown: mean, median, mode and range, population and sample standard deviation, variance, z-scores, percentile ranks, normal ranges, standard error, margin of error, confidence intervals, sample size, linear regression and correlation.→
- Test Score CalculatorTest percentages, letter grades, class averages, flat and square-root curves, and weighted categories — the everyday grading toolkit with every rule shown.→
- Weighted Grade CalculatorA weighted grade average for syllabus categories: type each score and its weight, and the tool verifies the weights total 100% before it averages them.→
How this manual is organized
Each entry above opens a one-page tool: inputs on the left, the live result on its color board, and beneath the card the formula with worked examples and the method's limits. Save the tools you use often — they'll wait on this shelf next visit.