All Tools · Page 31
Find a tool by name, topic, or what you need to calculate.
Browse by use
A tool can belong to several categories. All tools lists each calculator once.
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 ↗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 ↗Physics
Hooke’s Law Calculator
Learning & Education · Middle School · High School · Science & LabFind applied spring force, extension or spring constant in the elastic range. Distinguish applied and restoring forces and calculate stored elastic energy.
Open calculator ↗Lever Balance Calculator
Learning & Education · Middle School · High School · Science & LabFind the effort force needed to balance a load about a fulcrum. Compare perpendicular moment arms, torque and ideal mechanical advantage.
Open calculator ↗Pulley Mechanical Advantage Calculator
Learning & Education · Middle School · High School · Science & LabEstimate effort and rope travel from the number of load-supporting rope segments. Compare ideal geometry with an entered overall lifting efficiency.
Open calculator ↗Buoyancy Calculator
Learning & Education · Middle School · High School · Science & LabCompare an object’s weight with displaced-fluid buoyancy. Enter displacement directly or estimate whether a uniform object floats, sinks or is neutrally buoyant.
Open calculator ↗Hydrostatic Pressure Calculator
Learning & Education · Middle School · High School · Science & LabFind the pressure increase with fluid depth, absolute pressure and the incremental force on a horizontal patch. Keep surface pressure separate from gauge pressure.
Open calculator ↗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
Dice Sum Probability Calculator
Learning & Education · Middle SchoolCount exact outcomes for the sum of fair dice. Choose an exact sum, a tail or an inclusive range and inspect the entire distribution.
Open calculator ↗Box Plot Comparison Calculator
Learning & Education · Middle SchoolCompare two datasets on the same axis using quartiles, Tukey whiskers and outlier points. Inspect differences in median and interquartile range.
Open calculator ↗Mark–Recapture Population Calculator
Learning & Education · Middle School · High SchoolEstimate a closed population from two samples and their marked overlap. Compare the school proportion estimate with the Chapman correction and the observed minimum.
Open calculator ↗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.
Open calculator ↗