TOYOTA 2013 Prius PHV - Manual (Page 413)

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2-5. Driving information
PRIUS PHV_OM_OM47787U_(U)
2
When
d
riving
Calculation formula for your vehicle
Cargo capacity
Total load capacity (vehicle
capacity weight) (
→P. 610)
When 2 people with the combined weight of A lb. (kg) are riding in
your vehicle, which has a total load capacity (vehicle capacity weight)
of B lb. (kg), the available amount of cargo and luggage load capacity
will be C lb. (kg) as follows:
B * 2 lb. (kg) – A * 1 lb. (kg) = C * 3 lb. (kg)
* 1 : A = Weight of people
* 2 : B = Total load capacity
* 3 : C = Available cargo and luggage load
In this condition, if 3 more passengers with the combined weight of
D lb. (kg) get on, the available cargo and luggage load will be reduced
E lb. (kg) as follows:
C lb. (kg) – D * 4 lb. (kg) = E * 5 lb. (kg)
* 4 : D = Additional weight of people
* 5 : E = Available cargo and luggage load
As shown in the example above, if the number of occupants
increases, the cargo and luggage load will be reduced by an amount
that equals the increased weight due to the additional occupants. 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.