Calculatorra started out as several different websites over the past 20 years. We learned a lot about our passion to provide people the best ways to calculate things online. Once we partnered that passion with an understanding that many online calculators are not helpful enough…we decided to make the best online calculator site on the planet. The result is Calculatorra. We are so excited you are here and hope we are able to help you on your journey for any calculation needs!