It's about 0.0000007 times as heavy as a Hippopotamus.
In other words, 39 grains is 0.0000006740 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 1,480,000 times that amount.(Hippopotamus amphibius) (adult, male)
The average weight of an adult male hippopotamus ranges from 57,900,000 grains. Appearances to the contrary, adult hippos cannot swim or float in water; they actually move by leaping and walking across lake bottoms at about 8 kph (5 mph).
It's about 0.0000004 times as heavy as an Elephant.
In other words, 39 grains is 0.000000420 times the weight of an Elephant, and the weight of an Elephant is 2,400,000 times that amount.(for African bush elephant, Loxodonta africana) (Adult, bull)
A bull African bush elephant weighs about 94,000,000 grains. Among African elephants, both males and females have tusks (whereas female Asian elephants, Elephas maximus, do not have tusks) which can grow to 3 m (10 ft) and typically weigh about 62,000,000 grains
It's about 0.0000004 times as heavy as a Tyrannosaurus rex.
In other words, 39 grains is 0.000000390 times the weight of a Tyrannosaurus rex, and the weight of a Tyrannosaurus rex is 2,600,000 times that amount.(for FMNH PR2081, a.k.a. "Sue") (a.k.a. Tyrannosaurus, a.k.a. T-Rex) (estimated live weight)
The notable Tyrannosaurus specimen housed at the Field Museum of Natural History in Chicago, Illinois, "Sue," is estimated to have weighed about 99,000,000 grains while alive. A renowned predator in popular culture, the teeth of tyrannosaurus rex were up to 33.02 cm (13 in) long.
It's about 0.0000002 times as heavy as an Anchor of a Cruise Ship.
In other words, 39 grains is 0.0000002240 times the weight of an Anchor of a Cruise Ship, and the weight of an Anchor of a Cruise Ship is 4,460,000 times that amount.(for QE2 forward anchor, a.k.a. RMS Queen Elizabeth 2)
Each of the forward anchors of the RMS Queen Elizabeth 2 weighs 174,000,000 grains. The anchor of the QE2 now sits in front of the Holyrood Church in Southampton, England, United Kingdom, along a pedestrian tourist route known as "the QE2 mile."
It's about 0.00000004 times as heavy as The Space Shuttle.
In other words, 39 grains is 0.0000000360 times the weight of The Space Shuttle, and the weight of The Space Shuttle is 28,000,000 times that amount.(for Endeavour, a.k.a. OV-105, a.k.a. Orbiter Vehicle-105) (empty weight, excluding main engines)
When empty, the space shuttle Endeavour weighs 1,100,000,000 grains. The shuttle's spacious cargo bay carried the Chandra X-ray Observatory into orbit in 1999 — a payload that weighed 300,000,000 grains.
It's about 0.00000003 times as heavy as a Blue Whale.
In other words, 39 grains is 0.00000002420 times the weight of a Blue Whale, and the weight of a Blue Whale is 41,300,000 times that amount.(Balaenoptera musculus)
Blue whales weigh between 1,610,000,000 grains. The largest mammal to have ever lived, blue whales feed almost exclusively on krill — tiny invertebrates weighing about 15.40 grains each.
It's about 0.00000002 times as heavy as a House.
In other words, 39 grains is 0.00000001620 times the weight of a House, and the weight of a House is 61,700,000 times that amount.(149 sq. m, single-level, unfurnished)
A 149 sq. m (1,600 sq. ft), single-story, unfurnished house (without extensive masonry) of the type commonly found in America would weigh approximately 2,410,000,000 grains, based on the weight of the included materials. In contrast, a yurt — a type of dwelling structure popular among nomadic peoples of East Asia — typically weighs less than 7,100,000 grains.