It's about 45,000 times as heavy as a Baseball.
In other words, 7.1 tons is 44,331.707317073 times the weight of a Baseball, and the weight of a Baseball is 0.000022557218309859 times that amount.(MLB rules)
Per Major League Baseball rules, a baseball must weigh between 0.00015625 tons and 0.0001640625 tons. A major league pitcher can throw a baseball at up to 150 kph (91 mph) (with a fastball pitch).
It's about 50,000 times as heavy as a Battery (D).
In other words, 7.1 tons is 47,700 times the weight of a Battery (D), and the weight of a Battery (D) is 0.000021 times that amount.(Alkaline)
A "D" size battery weighs 0.000149 tons. The D size battery is the oldest of the modern battery sizes, first invented by the National Carbon Company in 1898.
It's about one-fifty-thousandth as heavy as The Empire State Building.
In other words, 7.1 tons is 0.0000195 times the weight of The Empire State Building, and the weight of The Empire State Building is 51,300 times that amount.(New York City, New York)
The Empire State Building weighs approximately 365,000 tons. About 4% of the building's weight is its 6,000 cu. m (200,000 cu. ft) of limestone façade.
It's about 70,000 times as heavy as a Deck of Cards.
In other words, 7.1 tons is 69,000 times the weight of a Deck of Cards, and the weight of a Deck of Cards is 0.000014 times that amount.(ISO 216 B8 size, a.k.a. "poker size" 63 x 88 mm, 52-card deck)
A deck of 52 ISO 216 B8-size playing cards weighs 0.0001 tons. Utilizing nearly 3,700 decks, the record-holding largest card tower was built in early 2010, stood over 3.5 m (11 ft), and weighed over 0.25 tons.
It's about 100,000 times as heavy as a Battery (C).
In other words, 7.1 tons is 99,000 times the weight of a Battery (C), and the weight of a Battery (C) is 0.00001 times that amount.(Alkaline)
A "C" size battery weighs 0.000072 tons. C batteries are typically used in medium-drain devices such as musical instruments.
It's about 100,000 times as heavy as a Tennis Ball.
In other words, 7.1 tons is 112,000 times the weight of a Tennis Ball, and the weight of a Tennis Ball is 0.00000893 times that amount.(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must weigh about 0.0000636 tons. Competition balls are also tested for bounce height, with the standards requiring that a ball dropped from 254 cm must bounce back to a height of 135 cm to 147 cm.
It's about one-one-hundred-fifty-thousandth as heavy as The Golden Gate Bridge.
In other words, the weight of The Golden Gate Bridge is 125,000 times 7.1 tons.(San Francisco, California and Marin County, California) (Post 1986 weight reduction; total weight of bridge, anchorage, and approaches)
Following the completion of the 1986 project to eliminate excess material, the total weight of the Golden Gate Bridge — including its anchorages and approaches — is 887,000 tons. The two main cables in the spanning the bridge are spun out of a total of 129,000 km (80,200 mi) of wire.