Calculators and Converters

Choose from a multitude of free finance calculators, imperial and metric converters, math calculators, health calculators and other useful tools for everyday, general use.

PEMDAS Explained - How Does PEMDAS Work?

PEMDAS is a mnemonic acronym for the order of operations in math: parentheses; exponents; multiply or divide; add or subtract. When there are several operations in a single expression, it's important to calculate them in the proper order (parenthesis first, exponents second.....

How Many Cubic Feet Are In a Yard?

Are you wondering how to measure a cubic yard or how many cubic feet there are in a yard? Wonder no longer, here's what you need to know...1 cubic yard = 27 cubic feetExplanation and diagramsA foot is 12 inches long, making it exactly a third of a yard...

Compound Interest Formula - Explained

An in-depth look at the compound interest formula as we break down how to calculate compound interest. The concept of compound interest is that interest is added back to the principal sum so that interest is earned on that added interest during the next compounding period.

How To Measure Your Waist

Whether you're ordering clothes online, monitoring your weight, or designing a bespoke bucket chair for your space-shuttle to the moon (look, the world is on fire; it's OK to have a plan B), you need to be able to measure your body accurately. Here's how to get the digits for your waist.

Calculator suggestions

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Featured article

The history of the calculator

Photo of abacus

From abacus to iPad, learn how the calculator came about and developed through the ages. Read our featured article.