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An eight-minute shower uses 16 gallons at 2.0 gpm or 20 gallons at 2.5 gpm. In metric units, that is about 60.6 or 75.7 liters. Use the calculator below with your measured flow—not a generic average—for a result that applies to your bathroom.

Most modern shower heads are standardized enough to replace, but they are not universal in every situation. Confirm the connection standard, where the joint seals, hose and holder geometry, available clearance and destination-market requirements before buying.

Choose square or round for visual fit and handling. Choose the spray by effective outlet area, nozzle spacing, active zones, face size and flow performance. Two heads with the same shape can feel completely different. Two heads with different shapes can feel nearly identical when their nozzle maps are similar.