About Us

Who We Are

TankSizer is an independent resource for aquarium and terrarium keepers. We build fast, free calculators for tank volume, water weight, heater wattage, filtration and substrate, plus plain-language equipment guides.

Our Approach

The hobby is full of forum folklore. We stick to the standard formulas and the widely accepted rules of thumb, state our assumptions, and tell you when something is an estimate rather than a promise.

Affiliate Disclosure

Some product links are affiliate links, including Amazon links. If you buy through one, we may earn a small commission at no extra cost to you. It never changes what we recommend.