load is the measure of how heavy things is. Weight is measure in typical customary units.

The fixed of an object is the lot of material it contains. Fixed is measure in traditional metric units.

For day-to-day purposes, once you"re ~ above the surface ar of the earth, the difference is no important. But if you measure something on one more planet, its mass will be the same as it is top top earth—but its weight will certainly be different. (Weight relies on gravity, and gravity is different on various other planets! This is why when you"re floating in space, you"re weightless. girlfriend still have mass, though,)

Metric systems

The gram and kilogram space two units offered to measure up mass in the metric device .

from the gram, we acquire the rest of the metric systems using the traditional metric prefixes.


0.001 gram or 1 1000 gram


0.01 gram or 1 100 gram

Decigram (dg)

0.1 gram or 1 10 gram


1,000 milligrams

Dekagram (dag)

10 grams

Hectogram (hg)

100 grams

Kilogram (kg)

1,000 grams

Metric ton(t)

1,000 kilograms

A paper clip has a mass of around 1 gram.


A 1 liter bottle of water has a massive of 1 kilogram (plus a little bit extra because that the plastic).


U.S. Customary systems

The device for measuring load (not mass) in the customary mechanism is based upon ounce, pound, and also ton. The simple unit of load is a pound(lb).

1     pound   ( lb )   =   16     ounces   ( oz ) 1     ton   ( T )                 =   2 , 000     pounds

An ounce is the smallest unit that weight. A strawberry has a weight of about 1 ounce.


A vehicle has a load of about 2 tons.


To convert native one unit come another, we deserve to use unit evaluation . For example, a truck weights 6,000 pounds. How countless tons is this?

We know that 1     ton = 2 , 000     pounds .

To convert pounds come tons, you can divide 6 , 000 by 2 , 000 .

6 , 000 ÷ 2 , 000 = 3     lots .


(a) To convert from larger units to smaller units, multiply by the appropriate unit ratio.

(b) To transform from smaller units to larger units, main point by the reciprocal of the appropriate unit ratio.

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(c) multiply or separating by a unit ratio is mathematically indistinguishable to using a proportion come convert in between units of measure .