Grams, a submultiple of kilogram.
The mass of a cell phone would best be measured in grams (g) or kilograms (kg). These units are commonly used for measuring relatively small objects like cell phones.
It probably depends on what cell phone you have.
Grams would be the most suitable unit for measuring the mass of a cell phone.
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Pecks are units of volume, metric tons are units of mass, they can't be compared directly. We should know a density of items in pecks to calculate mass of 1 peck and then compare it to metric tons.
Idl
The metric unit of mass is the gram (g) in the International System of Units (SI). Other common metric units of mass include the kilogram (kg) and the metric tonne (t).
The gram is a metric unit of mass.
The metric standard unit of mass is the kilogram (Kg).
The mass of a fish tank should be measured in kilograms.