Math Guides
Use this collection to move from a mathematical definition to a worked method and then to a calculator that checks the arithmetic. Each guide names the quantities and shows how the formula is arranged.
Core Math
Percentage Formulas Guide
Learn percentage formulas for parts, change, reverse percentages and percentage points. Follow verified examples, see clear diagrams and try the calculator.
Read guideAlgebra
Slope and Intercept Explained
Learn slope and intercept with graphs, step-by-step examples, negative slopes and vertical lines. Check each equation and try the free slope calculator.
Read guideGeometry
Area Formulas Printable Reference
Learn area formulas with labeled diagrams, step-by-step examples, square-unit conversions and composite shapes. Print the reference and check your calculations.
Read guideTrigonometry
Radians vs Degrees Guide
Learn radians vs degrees with exact conversion formulas, a common-angle table, diagrams and step-by-step examples. Check angles and avoid DEG/RAD mode mistakes.
Read guideStatistics
Basic Statistics Guide
Learn basic statistics with worked mean, median, standard deviation, percentile and z-score examples. Compare methods, read charts and check your answers.
Read guideHow to choose a guide
Choose a percentage guide for proportional change, slope and intercept for linear relationships, and formula references when you need notation or a step-by-step rearrangement.
Editorial method and source
Math content is checked by substituting worked examples back into the stated equation and by testing boundary inputs in the linked calculator.
Toolarithm editorial and calculation methodologyWho maintains this page
Ownership and review
Written and maintained by the Toolarithm editorial team. No review date is shown without a maintained editorial record. No independent professional review is claimed.
Methodology
The editorial team checks definitions, examples, linked tools, and cited references. Dates shown here come from the page's maintained publication record.
Read the editorial methodologyDates and sources
Review dates change only after a substantive method or content check.