What is the mass of a U.S. dollar bill in grams?

• A. 1.05 g
• B. 1.0 g
• C. 1.2 g
• D. 0.5 g

Answer: (A)

The mass of a single U.S. dollar bill is a small, practical quantity because the note is made from a cotton-linen blend and is only about a millimeter thick. In standard references and estimation problems, a bill is treated as weighing roughly one gram. The figure 1.05 g is the closest widely cited average for a single bill, so it aligns with the common expectation for its mass. Real bills can vary a bit with wear, moisture, or denomination, but for quick calculations, treating a bill as about 1 gram—and using 1.05 g as the precise representative value—gives the best match to standard data. The other options are noticeably off for a single note: they either undershoot or overshoot the typical mass by enough to misrepresent a single bill.