HVAC Math is a collection of browser tools by Mikhail Nikitin, the developer behind Ductulator and Refrigerant Charge Calculator.
Each calculator gives you a useful result directly in your browser. The dedicated iPhone and iPad apps offer additional tools, reference material and workflows for field use.
Understand the assumptions
Each tool explains its calculation method, reference conditions and limitations. Results support preliminary planning and field checks. Final installation and service decisions require the applicable standards, manufacturer instructions and project conditions.
Questions or corrections
Found a result you want to check? Email nnnikitinmh@gmail.com with the calculator name, inputs and the result you expected.