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Hot Tub Base Calculator
Hot Tub Dimensions
Hot Tub Length
?
Enter the overall length of your hot tub in feet
ft
Hot Tub Width
?
Enter the overall width of your hot tub in feet
ft
Hot Tub Height
?
Enter the height of your hot tub in feet
ft
Extra Margin
?
Extra clearance around your hot tub for maintenance
ft
Weight Details
Hot Tub Empty Weight
?
Weight of your hot tub without water or occupants
lbs
Water Capacity
?
Total water capacity in gallons
gal
Maximum Occupants
?
Maximum number of people who can use the hot tub
people
Average Occupant Weight
?
Average weight per person
lbs
Base Material
Select Material
?
Choose the type of base you plan to install
Concrete Slab
Wooden Deck
Gravel Base
Paver Base
Slab Thickness
?
Recommended minimum 4 inches
in
Include Rebar
?
Recommended for heavy hot tubs
Yes (Recommended)
No
Concrete Base Information
Provides the strongest and most stable support
Ideal for permanent installations
Requires proper curing time (7-28 days)
Consider adding slope for drainage
Joist Spacing
?
Distance between support joists
12 inches (Heavy Duty)
16 inches (Standard)
Wooden Deck Information
Requires proper structural support
Must handle at least 100 lbs per square foot
Consider using 2x8 or 2x10 joists
Allow for adequate ventilation
Gravel Depth
?
Recommended minimum 4 inches
in
Gravel Base Information
Excellent drainage properties
Requires weed barrier
May need periodic leveling
Consider using a hot tub pad
Sand Base Depth
?
Depth of sand bed under pavers
in
Paver Base Information
Provides solid, attractive foundation
Requires proper base preparation
Use polymeric sand between pavers
Ensure base is completely level
Calculate Base Requirements
Calculation Results
Base Dimensions
Weight Distribution
Load Analysis
Material Requirements
