All Tools · Page 48
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Business
Geometry
Rectangle from Area and Perimeter
Learning & Education · Middle SchoolRecover a rectangle’s two side lengths from its area and perimeter. Detect impossible measurements and the square boundary, with a dimensioned outline.
Open calculator ↗Height from Shadows Calculator
Learning & Education · Middle School · High School · Construction & DIYEstimate an object’s height from its shadow and a reference object measured at the same time. Mix length units and see the similar-triangle proportion.
Open calculator ↗Parallel Lines and Angles Calculator
Learning & Education · Middle SchoolFind all eight angles made by a transversal crossing two parallel lines. Select the known numbered angle and compare equal and supplementary angle groups.
Open calculator ↗Coordinate Transformation Calculator
Learning & Education · Middle School · High SchoolReflect, rotate or translate a point in the coordinate plane. Keep exact fractional coordinates and compare the original point with its image on equal-scale axes.
Open calculator ↗Circle and Line Intersection Calculator
Learning & Education · High SchoolFind whether a circle and an infinite line meet in zero, one or two points. Compare the center-to-line distance, projection foot and intersection coordinates with a diagram.
Open calculator ↗Mathematics
Radical Arithmetic Calculator
Learning & Education · Middle SchoolAdd, subtract, multiply or divide two real radical terms. Simplify square factors, combine matching radicals and rationalize a radical denominator.
Open calculator ↗Repeating Decimal Calculator
Learning & Education · Middle SchoolConvert a repeating decimal block to an exact fraction, or find a fraction’s terminating prefix and complete repeating cycle.
Open calculator ↗Integer Quotient and Remainder Calculator
Learning & Education · Middle SchoolDivide signed integers with a nonnegative remainder. Verify the identity and use the same modulo convention for cyclic positions and clock arithmetic.
Open calculator ↗Measurement Interval Calculator
Learning & Education · Middle SchoolPropagate absolute measurement bounds through addition, subtraction, multiplication or division. See a guaranteed enclosing interval rather than a statistical confidence interval.
Open calculator ↗Area Between Curves and Rotation Volume
Learning & Education · High School · Design & Drawing · Construction & DIYCalculate geometric area between two quadratic profiles or washer volume around the x-axis. Split crossing curves for area and validate inner and outer radii for rotation.
Open calculator ↗Meeting and Catch-Up Calculator
Learning & Education · Middle School · Time & Planning · Sports & FitnessFind when two travelers meet or one catches the other at constant speed. Choose directions, mix speed units and compare signed positions over time.
Open calculator ↗Absolute Value Equation and Inequality Calculator
Learning & Education · Middle School · High SchoolSolve |ax+b|=c or an absolute-value inequality. See exact fractional boundaries, the inside or outside solution and a number line with endpoint rules.
Open calculator ↗Set Operations and Venn Diagram
Learning & Education · Middle School · High SchoolFind the union, intersection, difference, symmetric difference or complement of two finite sets. Compare the element lists, counts and highlighted Venn regions.
Open calculator ↗Polynomial Long Division Calculator
Learning & Education · High SchoolDivide one polynomial by another and follow each subtraction. See the exact quotient and remainder, the reconstruction identity and a substitution check.
Open calculator ↗Order of Operations Calculator
Learning & Education · Middle School · High SchoolEvaluate a numeric expression with parentheses, powers and the four arithmetic operations. Follow the actual evaluation order and keep an exact fraction answer.
Open calculator ↗Linear and Quadratic Inequality Calculator
Learning & Education · Middle School · High SchoolSolve a linear or quadratic inequality against zero. See the solution intervals, open or closed endpoints, a sign chart and a number line.
Open calculator ↗Quadratic Function Maximum and Minimum
Learning & Education · Middle School · High SchoolFind the maximum and minimum of ax²+bx+c on an entered closed interval. Compare both endpoints and the vertex, with a graph and candidate table.
Open calculator ↗Physics
Thin Lens Calculator
Learning & Education · High School · Science & Lab · Design & DrawingFind image distance and signed magnification for a thin lens and a real object. Distinguish real, virtual and focal-plane cases with a lens layout.
Open calculator ↗Force and Friction Calculator
Learning & Education · High School · Science & Lab · Construction & DIYResolve two forces into a resultant, or check whether a block can stay at rest on an incline. Inspect components, friction limits and acceleration after slipping begins.
Open calculator ↗Statistics
Survey Population Estimate Calculator
Learning & Education · Middle School · High SchoolProject a sampled proportion to a known population. Compare the estimate with the logically possible count range and, for small sample fractions, a Wilson sampling interval.
Open calculator ↗Expected Value Calculator
Learning & Education · Middle School · High SchoolEnter discrete outcomes and their probabilities to calculate expected value, net expectation after a fixed cost and outcome spread.
Open calculator ↗Conditional Probability and Bayes Calculator
Learning & Education · High School · Science & LabUpdate an event probability after a positive or negative signal. See the base-rate effect, a four-outcome probability table and expected counts for quality-control scenarios.
Open calculator ↗Grouped Frequency Calculator
Learning & Education · Middle School · High SchoolBuild a frequency table from class intervals and counts. Find relative and cumulative frequencies, a midpoint mean estimate and a histogram that supports unequal class widths.
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