What is Multiple Calculator.com?
Multiple calculator is an online service that allows you to solve various problems and complete tasks that lend themselves to mathematical modelling. Officially launched in early 2025, it has since provided online calculators which can help you in many practical situations, educational, and research tasks, as well as converters that makes it easier to navigate the world of measurements. Our aim is to become the biggest collection of such tools online, currently consisting of over 10 calculators, over 155 converters, and 16 randomizers.
All calculators that you see are developed in-house. Some converters, for example currency converters, may use external databases and so their accuracy is, of course, somewhat outside of our control. The random number generator used in our various randomizers has been tested for statistical unbiasedness.
Who are we?
We are a small team with expertise in web development, mathematics, and statistics, based in the European Union. The site is owned and operated by Web Focus LLC, a company based in Sofia, Bulgaria.
Leading the project is Georgi Georgiev who has over ten years experience in providing specialized tools for the online analytics and A/B testing community. He is the author of a book on statistical methods (“Statistical Methods in Online A/B Testing”) and numerous articles on statistics and the design of experiments. He is also a lecturer at live and online events, delivering talks on topics such as statistics, online controlled experiments, web analytics, and management of online advertising campaigns.