Volume
0 gal
Weight (Full)
0 lbs
Filter Flow
0 GPH
| Specification | Value |
|---|---|
| Tank Shape | Rectangular |
| Dimensions (L×W×H) | 24×12×12 in |
| Volume | 0 gal / 0 L |
| Water Weight | 0 lbs / 0 kg |
| Glass Weight | 0 lbs |
| Total Weight | 0 lbs |
| Filter Pump (5× turnover) | 0 GPH |
| Heater Wattage | 0 W |
| Substrate Volume | 0 L |
Aquarium Volume Calculator: Complete Guide to Tank Size, Weight & Equipment
Setting up a new aquarium? Our aquarium volume calculator gives you exact volume in gallons and liters, total weight, filter pump size, heater wattage, and substrate needs — all in one click.
How to Use the Calculator
- Choose your tank shape (rectangular, bowfront, cylinder, etc.)
- Enter length, width, height in inches
- Add optional glass thickness and substrate depth
- Get instant results for volume, weight, and equipment
Volume Calculation Formulas
- Rectangular:
L × W × H ÷ 231 = gallons - Bowfront: Uses adjusted width formula
- Cylinder:
π × r² × h ÷ 231 - Hexagonal:
2.598 × s² × h ÷ 231
Example: 24×12×12 Rectangular Tank
Volume: 20 gallons
Water Weight: 167 lbs
Glass Weight: ~15 lbs
Total Weight: ~182 lbs
Filter: 100 GPH
Heater: 100 W
Substrate (2" depth): 24 liters
Standard Aquarium Sizes Chart
| Size | Dimensions | Volume | Weight (Full) |
|---|---|---|---|
| 10 Gallon | 20×10×12 | 10 gal | ~111 lbs |
| 20 Gallon | 24×12×16 | 20 gal | ~225 lbs |
| 55 Gallon | 48×13×21 | 55 gal | ~625 lbs |
| 75 Gallon | 48×18×21 | 75 gal | ~850 lbs |
Filter Pump Sizing (Turnover Rate)
- Freshwater: 5× volume per hour
- Planted: 6–8×
- Reef: 10–20×
Heater Wattage Guide
- 5 watts per gallon (up to 80°F)
- 3 watts per gallon (tropical 75–80°F)
- Always use two smaller heaters for redundancy
Substrate Calculator
2" depth is ideal for most plants. Use our calculator to avoid buying too much gravel or sand.
Weight Considerations
- Water: 8.34 lbs per gallon
- Glass: ~12 lbs per square foot (1/4" thick)
- Stand must support full weight + 20% safety margin
Pro Tips for Aquarists
- Measure inside dimensions for accuracy
- Account for displacement from decorations
- Place tank on level, reinforced floor
- Use our pet food calculator for fish feeding
Common Mistakes to Avoid
- Overstocking based on volume alone
- Using undersized filter
- Placing tank near windows (algae growth)
FAQs
How many fish per gallon? 1 inch of fish per gallon (slim-bodied).
Can I use cm instead of inches? Convert: 1 inch = 2.54 cm.
Does substrate reduce water volume? Yes — 1" depth reduces ~0.5 gal per sq ft.
Conclusion
Proper planning prevents disasters. Use our free aquarium volume calculator before buying your next tank. Save money, avoid leaks, and keep fish healthy.
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