AVCalc LLC was established in 2014 by Alexander Vilens* to continue development, marketing and support of the ever growing in popularity, the conversions and calculations, Aqua-Calc.com website.  Mr. Vilens had published the very first version of the website back in 2005 to help his friends to calculate how much gravel is needed to attain a specific depth in their aquariums, hence the domain name Aqua-Calc.com. Now the website includes more than 850,000 online calculators, conversions, reference and tutorial pages. See Aqua-Calc  about page for detailed information about Aqua-Calc current features and capabilities, and the news page for recent changes to Aqua-Calc website.

AVCalc LLC is located in Hoboken, New Jersey in the United States.
You can contact us online using this form or our support forum.
You can also reach us by telephone at (+1) 201 222-9191.
Our DUNS number is 09-419-3270.
Here is our Privacy Policy and Terms and Conditions.


Alexander Vilens*Mr. Vilens is an internationally known informational technology expert with a background in physics, mathematics, and business administration.  Mr. Vilens received his M.S. degree in Physics from Odessa University in Odessa, Ukraine. He also has knowledge and experience in business management.

Mr. Vilens lives and works in New Jersey.  With more than 25 years of experience, Mr. Vilens is a recognized authority on checkpoint/restart for z/OS batch applications and Db2 thread management.  He is an expert in development, marketing and support of the program products which enhance IBM’s z/OS, Db2, IMS and WebMQ environments with successful implementations in Fortune 1000 organizations worldwide.

Mr. Vilens is the editor of 7 books: Internet and Suicide (2009), War and Suicide (2009), Terror and Suicide (2009), Suicide in the Military (2009), Suicidal Behavior in Alcohol and Drug Abuse and Dependence (2010), Neurobiology of Post-Traumatic Stress Disorder (2010), and Immigration and Mental Health: Stress, Psychiatric Disorders and Suicidal Behavior Among Immigrants and Refugees (2010).

Mr. Vilens is a co-editor of the Internet and Psychiatry website, the most influential non-commercial website in the field of psychiatry.

Mr. Vilens has many interests.  He enjoys photography and is interested in physics, linguistics, and psychiatry.