Math & Scientific tool map
Arithmetic & algebra
Numbers, fractions, percentages, sequences, and equations.
Choose the tool whose inputs and output match your task. Check each calculator’s assumptions and limitations before using its result.
Average Percentage Calculator
Find the simple average of two to five percentages, with guidance on when equal-weight averaging is valid and when weighted totals are required.
Binary to Hexadecimal Calculator
Convert binary numbers to hexadecimal and hexadecimal digits to binary while understanding four-bit grouping, base 2, base 16, padding, and width limits.
Cross Product Calculator
Calculate the 3D cross product vector, components, and magnitude, with determinant derivation, right-hand-rule interpretation, units, and edge cases.
Decibel Calculator
Convert decibels to power or amplitude ratios, convert ratios to dB, and combine two sound levels with logarithmic formulas and safety context.
Fraction Calculator
Add, subtract, multiply, and divide fractions with simplified results, mixed numbers, decimal values, denominator rules, and worked examples.
Molarity Calculator
Calculate molarity from moles of solute and liters of solution, with amount concentration definition, units, lab cautions, and checked examples.
Percent Off Calculator
Calculate sale price and savings from an original price and advertised percent-off discount, with clear formulas for markdowns, stacked deals, tax, and final cost.
Percent to Goal Calculator
Calculate percent complete, remaining amount, percent remaining, and goal exceeded status for fundraising, savings, quotas, tasks, and measurable targets.
Percentage Calculator
Calculate percent of a number, what percent one value is of another, and percent change with clear formulas, examples, domains, and interpretation.
Percentage Change Calculator
Calculate percent increase or decrease from an original value to a new value, with absolute change and clear guidance on baseline, sign, and zero-value limits.
Percentage Difference Calculator
Compare two values symmetrically with percentage difference, using the average baseline rather than an old or new value.
Percentage Increase Calculator
Find the new value after adding a known percentage increase to an original value, with formulas, examples, edge cases, and comparison guidance.
Random Number Generator
Generate pseudo-random integers or decimals within a chosen range, with optional no-duplicate draws for everyday sampling, games, and classroom examples.
Scale Converter Calculator
Convert real-world measurements to model dimensions and model dimensions back to real size using a 1:X scale ratio and clearly labeled length units.
Scientific Notation Calculator
Convert decimal numbers to scientific notation or expand scientific notation to standard form, with E notation, exponent rules, examples, and edge-case guidance.
Weighted Average Calculator
Calculate a weighted average or weighted mean for grades, portfolios, lab measurements, survey scores, and any dataset where entries carry unequal importance.
Weighted GPA Calculator
Calculate weighted and unweighted GPA from course grades and credits using clearly stated illustrative bonuses for honors and AP or IB courses.