It's about 20,000 times as heavy as a Penny
In other words, the weight of a Penny is 0.0000500 times 50 kilograms.(United States) (formally one-cent coin) (Union shield design, 2010-present)
The weight of a United States penny is 0.0025 kilograms. According to a 2010 report by the United States Mint, the cost of manufacturing and distributing a penny is $0.0179 — more than its face-value.
It's about 30,000 times as heavy as a Playing Card
In other words, 50 kilograms is 28,000 times the weight of a Playing Card, and the weight of a Playing Card is 0.0000360 times that amount.(ISO 216 B8 size, 2.5" x 3.5")
A single ISO 216 B8-size playing card weighs 0.0018 kilograms. Although this size is the most common home playing card, many casinos use "bridge size" cards — 2,640 sq. mm (4.036 sq. in) smaller in area.
It's about 35,000 times as heavy as a Paper Clip
In other words, the weight of a Paper Clip is 0.0000280 times 50 kilograms.(average)
Notwithstanding the tremendous variation in sizes and materials, a typical paperclip weighs about 0.0014 kilograms. The country of Norway has used the paper clip as something of a national symbol since the end of World War II based on the erroneous notion that the paperclip was invented by a Norwegian, Johan Vaaler. However, the paperclip had already been in existence for at least 30 years by the time of Vaaler patented his paperclip design.
It's about 45,000 times as heavy as a Jelly Bean
In other words, the weight of a Jelly Bean is 0.0000220 times 50 kilograms.(for Jelly Belly beans; approximate)
Made of sugar, corn syrup, and pectin, a single jelly bean weighs about 0.0011 kilograms. President Ronald Reagan cited jelly beans as his favorite candy and 3,200 kilograms of the candies were served at his first inauguration in 1981.
It's about 65,000 times as heavy as a Nail
It's about 300,000 times as heavy as a Raindrop
In other words, the weight of a Raindrop is 0.00000300 times 50 kilograms.(a.k.a. drop, a.k.a. droplet) (average)
The weight of a raindrop depends heavily on the type of weather, but averages about 0.0002 kilograms. The familiar teardrop shape of a raindrop is actually an optical illusion, caused by the reflection of the light and the motion of the drop.
It's about 2,500,000 times as heavy as a Grain of Rice
In other words, the weight of a Grain of Rice is 0.000000420 times 50 kilograms.(conventional; US; long-, medium-, and short-gran varieties; uncooked)
With great differences in variety, the average among a sampling of common short-, medium- and long-grain rices finds that a single grain weighs about 0.0000210 kilograms before cooking. A staple through most of human history, archaeological evidence indicates that the earliest rice cultivation was about 11,500 years ago.