The Compound Interest Formula

Formula Used to calculate: The future value of a principal amount when interest is compounded at regular intervals. — What Is the Compound Interest Formula? The compound interest formula calculates the future value of an initial principal when interest is periodically added to the balance. Unlike simple interest, compound interest allows previously accumulated interest to … Read more

The Simple Interest Formula

Formula Used to calculate: The amount of interest earned or owed on a principal amount when interest does not compound. — What Is the Simple Interest Formula? The simple interest formula calculates interest based only on the original principal. Unlike compound interest, previously earned or accumulated interest is not added to the principal when calculating … Read more

The Harmonic Mean Formula

Formula Used to calculate: The average of a set of nonzero values using the reciprocals of those values. — What Is the Harmonic Mean Formula? The harmonic mean formula calculates a type of average by taking the reciprocal of the arithmetic mean of the reciprocals of the values. It is particularly useful for averaging rates … Read more

The Geometric Mean Formula

Formula Used to calculate: The average of a set of positive values based on their product rather than their sum. — What Is The Geometric Mean Formula? The geometric mean formula calculates a type of average by multiplying all values in a data set and taking the nth root of the product, where n is … Read more

The Weighted Mean Formula

Formula Used to calculate: The average of a set of values when individual values contribute different amounts, or weights, to the result. — What Is the Weighted Mean Formula? The weighted mean formula calculates an average in which some values contribute more to the result than others. Each value is multiplied by its corresponding weight, … Read more

The Arithmetic Mean Formula

Formula Used to calculate: The average value of a set of numerical values. — What Is the Arithmetic Mean Formula? The arithmetic mean formula calculates the average of a set of numerical values. It is found by adding all values in the data set and dividing their sum by the number of values. — Formula … Read more

The Unit Rate Formula

Formula Used to calculate: The amount of one quantity corresponding to one unit of another quantity. — What Is the Unit Rate Formula? The unit rate formula compares two quantities by dividing one quantity by another so that the second quantity has a value of one. It expresses how much of the first quantity corresponds … Read more

The Proportion Formula

Formula Used to calculate: Whether two ratios are equal and to find an unknown value when three terms of a proportion are known. — What Is the Proportion Formula? The proportion formula states that two ratios are equal. It represents a relationship in which the quantities in one ratio have the same relative relationship as … Read more

The Ratio Formula

Formula Used to calculate: The relative size of one quantity compared with another quantity. — What Is the Ratio Formula? The ratio formula compares two quantities by dividing one quantity by another. A ratio describes how much of one quantity there is relative to another and can be written as a fraction, with a colon, … Read more

The Percent Error Formula

Formula Used to calculate: The size of the error between a measured or experimental value and an accepted value, expressed as a percentage of the accepted value. — What Is the Percent Error Formula? The percent error formula measures how far a measured or experimental value is from an accepted or reference value. It compares … Read more