THE PASTEZAP TOOLKIT
Education & Science
Scientific calculator, citations, grades, matrices, significant figures, the periodic table, molar mass and equation balancing for students and teachers.
Choose from 13 focused tools. Each page shows supported formats, practical examples and input limits before you begin. No account is required.
13 tools
Scientific Calculator
Free online scientific calculator with trigonometry in degrees or radians, logarithms, powers, roots, factorials, nCr, memory and a history of results.
Citation Generator (APA, MLA, Chicago, Harvard)
Format references for journal articles, books and web pages in APA 7, MLA 9, Chicago 18 and Harvard at once, with in-text citations and italics kept on paste.
Weighted GPA Calculator
Calculate a credit-weighted average using an editable institutional grade scale.
Grade Calculator
Calculate your weighted course grade from assignments, quizzes and exams, with a letter grade and the share of the course already graded.
Final Grade Calculator
Find the score you need on the final exam to reach a target course grade, plus a table for every letter grade.
Interactive Periodic Table
Explore all 118 elements: click any element for its atomic mass, group, period, block, category, state and electron configuration, or search by name or symbol.
Matrix Calculator
Multiply, add and subtract matrices, and find the determinant, inverse, transpose, rank, row echelon form and powers with exact fractions.
Molar Mass Calculator
Calculate the molar mass of any chemical formula, including brackets and hydrates, with the mass percentage of each element and grams-to-moles conversion.
Chemical Equation Balancer
Balance chemical equations, including ionic equations with charges, and check that every element and the total charge are conserved.
Long Division Calculator
Divide whole numbers with long division shown step by step, with the remainder, the decimal result and repeating digits marked.
GCD and LCM Calculator
Find the greatest common divisor and least common multiple of several numbers, with prime factorisations and Euclidโs algorithm step by step.
Significant Figures Calculator
Count significant figures, round to any number of them, and multiply, divide, add or subtract with the correct significant-figure rules.
Scientific Notation Converter
Convert numbers to and from scientific, engineering and E notation, with SI prefixes and optional rounding to significant figures.