Instantly find your tank's precise size in gallons or liters. Accurate volume is the first step to a thriving aquatic ecosystem.
This is the gross volume. Actual water volume may be 10-20% lower.
Precision is the foundation of a healthy, stable aquarium. Here are three key reasons why.
Your tank's volume determines its bio-capacity. Knowing the exact number helps prevent dangerous overstocking, leading to healthier, less stressed fish.
Accuracy is critical. Overdosing chemicals can be toxic, while underdosing is ineffective. Precise volume ensures safe and effective treatment.
Filters and heaters are rated for specific volumes. Matching your equipment to your tank's true size ensures an efficient, stable, and healthy environment.
Our calculator finds the gross volume—the total capacity of the empty tank. However, the net volume (the actual water) is always lower due to displacement from substrate, rocks, and decor.
Pro Tip: To estimate net volume, subtract 10–15% (or up to ~20% for heavy aquascapes). For dosing, always use this lower net volume.