Aquarium Volume Calculator: Gallons, Liters & More
Accurately calculate your aquarium's water volume for proper stocking, dosing, and maintenance. Supports all tank shapes and measurement units.
Advanced Options (Substrate & Displacement)
Estimated water volume displaced by rocks, driftwood, etc.
Aquarium Volume Results
Total Tank Volume:
Gallons
Liters
Actual Water Volume:
Gallons
Liters
After substrate and decoration displacement
Water Weight Estimate:
lbs ( kg)
Water Change Amounts:
10%: gal
25%: gal
50%: gal
75%: gal
Why Accurate Aquarium Volume Matters
Knowing the precise volume of your aquarium is essential for successful fish keeping. Our calculator provides exact measurements for all tank shapes and accounts for factors that affect the actual water volume in your system.
Benefits of Our Aquarium Volume Calculator
- Multi-Shape Support - Calculate volumes for rectangular, cylindrical, bow front, hexagonal, and corner tanks
- Complete Unit Flexibility - Work with inches, centimeters, feet, or meters based on your preference
- Substrate Adjustment - Account for substrate depth to determine actual water volume
- Decoration Displacement - Factor in volume displaced by rocks, driftwood, and other hardscape
- Water Change Helper - Quickly determine common water change amounts
- Weight Estimation - Calculate the weight of your filled aquarium for stand and furniture considerations
Why Accurate Volume Calculation Matters
Proper aquarium management depends on knowing your tank's exact water volume for:
- Calculating appropriate stocking levels (inch of fish per gallon)
- Determining correct medication and treatment dosages
- Adding the right amount of water conditioners and additives
- Planning effective water change routines
- Estimating heating and filtration requirements
- Ensuring your stand or furniture can support the tank's weight
- Understanding the tank's biological capacity
Common Aquarium Volumes
While custom tanks come in all sizes, these are standard aquarium sizes you might recognize:
| Tank Name | Dimensions (inches) | Volume (gallons) | Common Uses |
|---|---|---|---|
| Nano | 12 × 8 × 8 | 3.5 | Bettas, shrimp |
| Standard | 20 × 10 × 12 | 10 | Small community |
| Long | 30 × 12 × 12 | 20 | Community, small cichlids |
| Breeder | 36 × 18 × 12 | 33 | Breeding, larger species |
| Standard | 48 × 13 × 20 | 55 | Large community, cichlids |
Try our free Aquarium Volume Calculator today to ensure proper care for your aquatic pets and optimize your tank maintenance routine!