Education & Math

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.