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Choosing a tub
Sizes & shapes
Brands
Heating & costs
Water care
Setup & upkeep
Choosing an inflatable hot tub
Sizes and shapes
Hot tub brands
Heating and running costs
Water care
Setup and upkeep
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Calculators
Calculators
Calculators and charts
Small tools that do the maths for you, and charts to look things up.
Hot tub heat-up calculator
Minimum kWh, heating hours and pence to heat your tub from cold, with your own unit rate.
Calculator
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Hot tub water volume and fill time
Litres, UK gallons, filled weight and fill time from the inner size of a round or square tub.
Calculator
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