Jacek Staszak

rule of 72, compound interest

What is Rule of 72?

Albert Einstein is said to have told that ‘compound interest is the eighth wonder of the world.' It may not be his quote, but he’d certainly agree that the meaning and consequences of compound interested are very underrated. For many, compound interest and exponential growth are terms that evoke bad memories...

sleep, sleep calculator

The Sleep Calculator: When you should go to bed?

Omni Calculator introduced a new tool that helps people in their everyday struggle with lack of proper sleep. The Sleep Calculator helps you determine when you should go to sleep to not only feel rested during the day but also, most importantly, fresh in the morning. Those two things are not...

Plug-in Hybrid MPG: What Would Yours Be?

What is the real MPG of a Plug-In Electric Vehicle? It's not as straightforward as in electric cars or gas engines. We've discovered that benefits of driving PHEVs depend on one factor. You. It turns out that due to a vast difference in effectiveness between electric and combustion engines, the real MPG...