Audience topic
Education & Study
Plan study, grade work and prepare classroom materials.
73 tools in this topicSupport teaching and study with calculators and templates for grades, lessons, quizzes, citations, revision and classroom planning. Tools are designed to organise work rather than complete learning on the student’s behalf.
Other tools
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Voltage Divider CalculatorCalculate unloaded and loaded output voltage, divider current and output resistance.Battery Series & Parallel CalculatorEstimate nominal voltage, amp-hours, watt-hours and total cells for an S/P bank.Series & Parallel Resistance CalculatorCombine up to two hundred positive resistor values in series or parallel.LED Resistor CalculatorEstimate a series resistor and its dissipation from supply, forward voltage and current.
Other tools
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Dew Point CalculatorEstimate dew point, temperature spread and vapor pressure from temperature and humidity.Air Density CalculatorEstimate moist-air density from temperature, relative humidity and station pressure.Absolute Humidity CalculatorEstimate water vapor per cubic meter, mixing ratio, vapor pressure and air density.Rainfall Rate CalculatorConvert rainfall depth and duration into an average rate and theoretical area volume.
Other tools
2Other tools
1Other tools
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Word CounterCount words, characters, sentences and paragraphs as you type.Character CounterCount characters with and without spaces, plus words and lines.Multiple Choice Answer ShufflerShuffle multiple choice answers.Word Frequency CounterSee which words appear most often.Sentence CounterCount the number of sentences in your text.Line CounterCount the number of lines in your text or list.Paragraph CounterCount the number of paragraphs in your text.
Calculators
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Normal Distribution CalculatorCalculate probability below, between and above entered bounds for a normal model with visible z-scores.Mechanical Power CalculatorConvert work over time into average watts, kilowatts and mechanical horsepower without hidden efficiency.Hydrostatic Pressure CalculatorCalculate gauge and absolute pressure at depth for a static constant-density fluid.Rectangle CalculatorCalculate rectangle area, perimeter and diagonal from positive length and width measurements.Trapezoid CalculatorCalculate trapezoid area, entered perimeter and midsegment from bases, height and side lengths.Cylinder CalculatorCalculate volume, total surface area and lateral area for a closed right circular cylinder.Linear Thermal Expansion CalculatorEstimate signed length change, final length and relative expansion from temperature change.Variance CalculatorCalculate population variance, sample variance and sample standard deviation from a browser-local number list.Rectangular Prism CalculatorCalculate box volume, surface area and space diagonal from three perpendicular edge lengths.Speed Distance Time CalculatorSolve any one value in the distance, average-speed and elapsed-time relationship with explicit units.Circumference CalculatorCalculate circle circumference, diameter and area from one positive radius in any consistent unit.Confidence Interval CalculatorEstimate a two-sided mean interval from sample mean, standard deviation, size and a preset level.Density Mass Volume CalculatorSolve for density, mass or volume from the other two values while keeping the unit relationship explicit.Reverse Percentage CalculatorRecover an original value from the final amount and a known percentage increase or decrease.Right Triangle CalculatorSolve all three sides from one acute angle and one known side, with area and complementary angle checks.Percentage Point Change CalculatorSeparate direct percentage-point movement from relative percent and basis-point changes.Trigonometry CalculatorCalculate sine, cosine and tangent together from an angle entered in degrees or radians.Complex Number CalculatorAdd, subtract, multiply or divide two complex numbers entered as separate real and imaginary parts.Gravitational Potential Energy CalculatorCalculate near-surface potential-energy change and weight from mass, height change and gravity.Ideal Gas Law CalculatorSolve PV equals nRT for pressure, volume, amount or absolute temperature with fixed SI units.Matrix Determinant CalculatorCalculate the determinant and trace of an entered three-by-three matrix and identify singular cases.Final Grade CalculatorFind the exam score needed for your target grade.Test Grade CalculatorCalculate test percentage and letter grade.Weighted Average CalculatorCalculate a weighted average from values and weights.Exam Score Needed CalculatorCalculate the exam score needed.Weighted Grade CalculatorCalculate a weighted course grade.Average CalculatorFind the mean of a list of numbers.