About CalcVisual

CalcVisual makes calculators for real projects: setting up an aquarium, sizing a pool heater, planning a solar system. Most calculator sites give you a number. We show you the number, a chart that explains it, and the formula behind it.

Every formula is written once, tested against at least two published sources (manufacturer guides, government data, standards bodies), and linked from the page so you can check our work. Here's how we test.

Found a mistake or have an idea for a calculator? Email hello@calcvisual.com.