Guppy Tank Size Calculator
Based on common aquarium care standards, this tool gives reliable estimates to keep your guppies happy and healthy. The estimated number of guppies that fit in a tank can be increased based on your setup (e.g. frequent water changes, heavily planted tank).
Option 1: How many gallons do I need for my guppies?
Option 2: How many guppies can I keep in my tank?
How Many Guppies Can You Keep Per Gallon?
Keeping guppies healthy and happy starts with choosing the right tank size. This free Guppy Tank Size Calculator helps you figure out:
- ✅ How many gallons you need for a certain number of guppies
- ✅ How many guppies you can safely keep in your current tank
Whether you're a beginner or experienced fishkeeper, this tool gives you quick guidance based on the common rule of 1.5 gallons per guppy. It's perfect for planning your guppy community and avoiding overcrowding.
Guppy Tank Size Guide
On average, each guppy needs about 1.5 to 2 gallons of water. While they're small, guppies are active swimmers and need space to thrive. Overcrowding can lead to stress, poor water quality, and even aggression. Use this calculator to get a good estimate before you stock your tank.
FAQs
❓ How many guppies in a 10-gallon tank?
A 10-gallon tank can comfortably house 6 to 8 guppies, depending on filtration and tank setup.
❓ What's the ideal male to female ratio for guppies?
The recommended ratio is 1 male to 2-3 females to minimize stress and aggressive chasing. Use our Breeding Calculator to determine the perfect group size for your tank setup and breeding goals.
❓ Can guppies live in a 5-gallon tank?
Yes, a 5-gallon tank can hold about 3 guppies safely. Just make sure the tank is cycled and filtered.