Cubic Feet to Gallons Converter
Convert cubic feet to gallons for tank volume, pool sizing, aquariums, and water system calculations. Includes liters and cubic inches.
💧 Volume📐 Gallons = Cubic Feet x 7.48052
Cubic feet
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Formula & Reference
| Variable | Formula | Units |
|---|---|---|
| Cubic Feet to Gallons Converter | Gallons = Cubic Feet x 7.48052 | US gallons |
Step-by-Step Examples
Example 1
Fish Tank
10 cubic feet to gallons.
- 10 x 7.48052 = 74.8 gallons
- A 74-gallon tank is large for home aquariums
✓ 74.8 gallons
Example 2
Water Tank
50 cubic feet storage tank.
- 50 x 7.48052 = 374 gallons
- A typical residential water storage tank holds 120-500 gallons
✓ 374 gallons
Example 3
Room Volume
12x10x8 ft room = 960 cubic feet.
- 960 x 7.48052 = 7,181 gallons
- Room volume in water equivalent - useful for HVAC calculations
✓ 7,181 gallon equivalent
Real-World Applications
Water Systems
Size water storage tanks, cisterns, and rainwater collection systems.
Aquariums
Calculate aquarium volume for stocking and filtration sizing.
Pools & Spas
Convert rectangular pool dimensions to gallons for chemical treatment.
Plumbing
Size water heaters and pressure tanks using volume calculations.
Common Mistakes to Avoid
⚠️
Not using consistent units
If your tank is 4 ft x 3 ft x 2.5 ft, multiply to get 30 cubic feet, then convert. Don't mix feet and inches without converting first.
⚠️
US gallon vs Imperial gallon
1 US gallon = 231 cubic inches. 1 Imperial gallon = 277.4 cubic inches. 1 cubic foot = 7.481 US gallons OR 6.229 Imperial gallons.
⚠️
Volume vs capacity
A tank rated at 100 gallons capacity may not be truly full at 100 gallons. Actual usable capacity accounts for equipment, overflow protection, and dead zones.
Frequently Asked Questions
How many gallons in a cubic foot? ▾
7.48052 US gallons per cubic foot. Or 6.229 Imperial (UK) gallons per cubic foot.
How many cubic feet in a gallon? ▾
0.1337 cubic feet per US gallon. A 55-gallon drum = 7.35 cubic feet.
How do I find a tank's volume in gallons? ▾
Measure length x width x depth in FEET (convert inches to feet first). Multiply the three dimensions to get cubic feet. Then multiply by 7.48 for US gallons.
What is 1 cubic meter in gallons? ▾
264.17 US gallons. 1 cubic meter = 35.315 cubic feet = 264.17 US gallons = 1,000 liters.
How many gallons in a hot tub? ▾
Most hot tubs: 250-450 gallons (33-60 cubic feet). Small 2-person tubs: about 250 gallons. Large 8-person tubs: 500-700 gallons.