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.

Pie chart percentage

Profit Margin Formula - Explained

The profit margin formula is a way of calculating what percentage of sales revenue remains as true profit, after all costs and expenses are accounted for. Profit margin is also sometimes known as gross profit ratio or return on sales ratio. Obviously, the higher the percentage, the healthier the com...

BMI formula on paper, with calculator

How To Calculate Your BMI

Body mass index is a measure of body fat and is commonly used within the health industry to determine whether your weight is healthy. BMI applies to both adult men and women and is the calculation of body weight in relation to height. This article delves into the BMI formula and shows you how to cal...

Man stacking coins demonstrating compounding

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.

Woman measuring her waist

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.

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