How many stamps for a letter from California to South Africa?

To mail an international letter from the United States to South Africa, the current postage rate (as of 2023) for a standard 1-ounce letter is $1.40. To calculate the total postage, you will need to purchase and affix one Forever international stamp to the letter, which currently covers this postage rate.

Additional weight beyond 1 ounce will require additional postage. The postage rates are subject to change, so it's always a good idea to consult the latest postage rates from USPS or other postal service providers before mailing an international letter.