Get the numbers right
Science and math · Page 2
Work with equations, shapes, quantities and measurements.
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- Law of cosines calculatorFind a triangle’s third side from two sides and the included angle: c² = a² + b² − 2ab cos C.
- Law of sines calculatorSolve a triangle with one side and two angles using a/sin A = b/sin B = c/sin C.
- Least to greatest calculatorSort a list numerically from least to greatest and greatest to least.
- Led resistor calculatorSeries resistance = (supply voltage − LED forward voltage) ÷ current. Current in milliamps is divided by 1,000.
- Lens formula calculatorSolve the thin-lens equation 1/f = 1/u + 1/v and magnification m = −v/u.
- Margin of error calculatorCalculate a normal-approximation margin of error for a sample proportion: z√(p(1 − p)/n).
- Matrix calculatorAdd, multiply, transpose or invert a matrix.
- Midpoint calculatorFind the point halfway between two Cartesian coordinates.
- Molality calculatorCalculate molality as moles of solute divided by kilograms of solvent.
- Molarity calculatorCalculate molarity as moles of solute divided by final solution volume in litres.
- Mole fraction calculatorDivide a component’s moles by the total moles to find its mole fraction.
- Outlier calculatorFlag values below Q1 − 1.5 × IQR or above Q3 + 1.5 × IQR.
- P value calculatorConvert a standard-normal z statistic into one-sided and two-sided p-values.
- Percent yield calculatorCalculate percent yield = actual product amount ÷ theoretical product amount × 100.
- pH calculatorCalculate −log₁₀ of hydrogen-ion concentration as an ideal dilute-solution pH estimate.
- Pipe volume calculatorPipe capacity = π × inside diameter² × length ÷ 4.
- PPM calculatorFind parts per million by mass: ppm = solute mass ÷ total mixture mass × 1,000,000.
- Quadratic equation solverFind real or complex roots from three coefficients.
- Reference angle calculatorFind the angle to the nearest horizontal axis after reducing the given angle to one turn.
- Rhombus calculatorRhombus area = diagonal one × diagonal two ÷ 2. Each side is half the hypotenuse formed by the two diagonals.
- RLC impedance calculatorFind sinusoidal series RLC impedance: Z = R + j(2πfL − 1/(2πfC)).
- Root calculatorFind square, cube and higher real roots.
- Scale calculatorScale a length by a multiplier and see how area and volume change.
- Segment area calculatorCircular segment area = radius² × (angle in radians − sin(angle)) ÷ 2.
- Slope calculatorFind a line’s slope and y-intercept from two points.
- Snow water equivalent calculatorConvert snow depth to water-equivalent depth using the density ratio.
- Snow weight calculatorCalculate snow mass = area × depth × supplied density.
- Specific heat calculatorSpecific heat = heat transferred ÷ (mass × temperature change).
- Speed calculatorAverage speed = distance ÷ elapsed time.
- Standard error calculatorEstimate uncertainty in a sample mean.
- Sum of squares calculatorCalculate Σx² and the centered sum Σ(x − mean)² for your list.
- System of equations solverSolve two linear equations in x and y.
- T test calculatorCompare sample means with an independent-sample Welch t test or a paired t test.
- Theoretical yield calculatorConvert a known limiting-reactant amount to product using the balanced-equation coefficient ratio.
- Unit vector calculatorDivide each component by the vector’s magnitude to get a unit vector in the same direction.
- Vector addition calculatorAdd matching components to find the sum of two vectors.
