How much Postage for a letter weighing 1.6 ounces?

The postage for a letter weighing 1.6 ounces depends on the mailing service used and the destination. In the U.S., for a standard First-Class Mail letter, as of 2023, the rate for letters up to 1 ounce is $0.66, and for each additional ounce, it's typically an extra $0.24. Therefore, a 1.6-ounce letter would cost approximately $0.90. Always check the latest rates from the postal service for any updates.