TOYOTA 2011 Avalon - Manual (Page 228)

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2-5. Driving information
AVALON_U (OM41428U)
Example on your vehicle
Cargo capacity
Total load capacity
When 2 people with the combined weight of 366 lb. (166 kg) are
riding in your vehicle, which has a total load capacity of 870 lb. (395
kg), the available amount of cargo and luggage load capacity will be
as follows:
870 lb. – 366 lb. = 504 lb. (395 kg –166 kg = 229 kg)
In this condition, if 3 more passengers with the combined weight of
388 lb. (176 kg) get on, the available cargo and luggage load will be
reduced as follows:
504 lb. – 388 lb. = 116 lb. (229 kg – 176 kg = 53 kg)
As shown in the above example, if the number of occupants
increases, the cargo and luggage load equaling the combined weight
of the occupants who got on later, by an amount. In other words, if an
increase in the number of occupants causes an excess of the total
load capacity (combined weight of occupants plus cargo and luggage
load), you must reduce the cargo and luggage on your vehicle.