Education, Math, And Science Tools

Calculate the slope and intercept of a line through two data points (simple linear regression with n=2).

Determine whether two data points indicate a positive or negative linear relationship and its slope.

Calculate the derivative of a quadratic function at a given x value.

Calculate the definite integral of a quadratic function between two bounds.

Calculate the average rate of change of a function between two points.

Calculate the sum of the first n terms of a geometric series.

Calculate the sum of the first n terms of an arithmetic series.

Calculate the probability of exactly k successes in n independent trials.

Calculate the Poisson probability of observing exactly k events given an average rate λ.

Calculate the probability of a specific outcome occurring n times in a row.

Calculate the union and unique-only counts for two overlapping sets.

Calculate torque from horsepower and engine RPM using the standard automotive formula.

Calculate gear ratio and output speed from input speed and tooth counts.

Estimate speedometer error percentage from original versus new tire diameter.

Calculate total engine displacement from bore, stroke, and number of cylinders.

Calculate moles of product from moles of reactant and a balanced equation's mole ratio.

Calculate percent yield from actual and theoretical yield in a chemical reaction.

Simplify a two-element mole ratio by dividing by the smaller value (for empirical formula determination).

Convert a percentage grade to an approximate 4.0-scale GPA value using a common linear mapping.

Calculate reading speed in words per minute and estimated time to read a document.

Calculate typing speed in words per minute from character count and time.

Calculate attendance percentage and how many classes can still be missed before falling below a target.

Allocate available study hours proportionally across two subjects by weight or difficulty.

Calculate the number of moles from a mass and known molar mass.

Calculate pH from hydrogen ion concentration.

Calculate pressure using the ideal gas law PV = nRT.

Calculate total resistance for two resistors in series and in parallel.

Calculate the output voltage of a two-resistor voltage divider.

Calculate the energy stored in a capacitor from capacitance and voltage.

Calculate the time constant of an RC circuit from resistance and capacitance.

Calculate the resistor value needed to safely drive an LED from a supply voltage.

Calculate three-phase electrical power from voltage, current, and power factor.

Calculate sine, cosine, and tangent of an angle in degrees.

Calculate the third side of a triangle using the Law of Cosines from two sides and the included angle.

Calculate a missing side using the Law of Sines from a known side and two angles.

Calculate the determinant of a 2x2 matrix.

Calculate the dot product of two 2D vectors.

Calculate the horizontal range of a projectile launched at an angle (no air resistance).

Calculate the time for an object to fall a given height under gravity.

Calculate mean and population standard deviation for two values (for full datasets use the list statistics tool).

Calculate population variance for two values.

Calculate joint probability of two independent events both occurring.

Calculate a confidence interval for a sample mean given standard deviation and sample size.

Calculate the missing side and angles of a right triangle from two known legs.

Calculate the area of a trapezoid from its two parallel sides and height.

Calculate the area of a parallelogram from base and height.

Calculate the area of a regular polygon from side length and number of sides.

Calculate the arc length of a circle from radius and central angle.

Calculate the area of a circular sector from radius and central angle.

Calculate the distance between two points in 3D space.

Calculate the magnitude and direction angle of a 2D vector.

Calculate the vertex of a parabola y = ax² + bx + c.

Solve ax² + bx + c = 0 for real or complex roots.

Calculate the exact number of permutations nPr.

Calculate the exact number of combinations nCr.

Calculate the exact value of n factorial (n!).

Calculate the exact greatest common divisor of two integers.

Calculate the exact least common multiple of two integers.

Calculate the area and circumference of a circle from its radius.

Calculate triangle area from three side lengths using Heron's formula.

Calculate the surface area and volume of a cube from its side length.

Calculate the percentage change between an original and a new value.

Calculate GPA from total quality points and total credit hours.

Calculate test score percentage and letter-grade boundary reference from points earned and possible.

Calculate average from a list of numbers.

Scale a ratio up or down while keeping the same proportion between its parts.

Solve a proportion a/b = c/x for the missing value x.

Calculate circle area, circumference, and diameter from radius.

Calculate standard deviation for three values.

Calculate weighted GPA from three courses.

Calculate greatest common divisor and least common multiple from a list of integers.

Factor an integer into prime factors locally.

Calculate median, mode, minimum, maximum, and count from a list of numbers.

Solve ax² + bx + c = 0 with the quadratic formula, including complex roots.

Calculate triangle area from base and height.

Convert between Roman numerals and decimal numbers.

Calculate rectangle area and perimeter from length and width.

Calculate square area, perimeter, and diagonal.

Calculate a cube's volume and surface area from a single side length.

Calculate rectangular box volume from length, width, and height.

Calculate cylinder volume and surface area.

Calculate sphere volume and surface area from radius.

Calculate cone volume from radius and height.

Calculate density from mass and volume, or solve for either given the other two.

Calculate speed from distance and time, or solve for distance or time instead.

Calculate acceleration from velocity change and time.

Calculate force from mass and acceleration.

Calculate kinetic energy from mass and velocity.

Calculate gravitational potential energy.

Calculate voltage from current and resistance.

Calculate electrical power from voltage and current.

Calculate the slope between two points on a line, given their coordinates.

Calculate distance between two points on a coordinate plane.

Calculate the midpoint between two coordinate points.

Calculate percent error from measured and accepted values.

Calculate n choose k combinations, the number of ways to pick k items from n.

Calculate permutations for n items taken k at a time.

Calculate the remainder after dividing one number by another (a mod b).

Calculate hypotenuse from two right-triangle legs.

Calculate weighted average from three values and weights.

Calculate z-score from value, mean, and standard deviation.

Estimate margin of error for a proportion from sample size and confidence z-score.

Estimate sample size for a proportion from confidence z-score and margin of error.

Calculate final value from starting value, growth rate, and periods.

Calculate logarithm of a value with a chosen base.

Interpolate y at x from two known points.

Calculate molarity from moles of solute and liters of solution.

Calculate final concentration after dilution.

Search common SI prefixes, symbols, and powers of ten.

Search resistor color bands and digit values.

Calculate the discriminant of a quadratic equation ax^2 + bx + c.

Calculate a base number raised to an exponent, including negative or fractional powers.

Calculate a weighted grade from three score and weight pairs.

Estimate margin of error for a proportion using confidence z-score and sample size.

Calculate unit rate from quantity and total value.