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How many stamps do I need to send letters within the United States?

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How many stamps do I need to send letters within the United States?

How many stamps do I need to send letters within the United States?

For just 1 $0.60 First-Class Mail® Forever® stamp, you can send 1 oz (about four sheets of regular, 8-1/2″ x 11″ paper in a rectangular envelope) to anywhere in the U.S.! A standard first-class letter envelope of standard size (rectangular) within 1 ounce in weight (and no stiff or delicate things inside the envelope) is $0.50…or you can use a single “forever stamp.” 

That is enough, or do you need to use as many stamps as necessary to equal $0.50? Your choice. Each additional ounce is an extra $0.21 in postage up to 3.5 ounces. After that, it becomes a package, and you have a different scale to calculate.

A letter weighing 1 ounce will need one first-class stamp. As of May 2023, a first-class stamp costs $0.55; every additional ounce is charged $0.15. So, if you are sending a 2-ounce letter, you will need $0.70 worth of postage stamps. The postal rates are as follows:

How Many Stamps Do I Need To Send A Letter In The U.S.? A letter weighing 1 ounce will need one first-class stamp. As of January 2019, a first-class stamp costs $0.55; every additional ounce is charged $0.15. So, if you are sending a 2-ounce letter, you will need $0.70 worth of postage stamps.

A letter weighing 1 ounce will need one first-class stamp. As of January 2019, a first-class stamp costs $0.55; every additional ounce is charged $0.15. So, if you are sending a 2-ounce letter, you will need $0.70 worth of postage stamps. Be aware that prices may vary depending on where you buy your stamps.

Domestic Mailing

First-class (1 oz.) Letter rates will increase from $ 0.47 to $ 0.49 when purchased at the post office. Each additional ounce will cost $ 0.21. The “measured mail” discounted category for first-class mail letters (1 oz.), which includes online postage providers and postage meters, will decrease from $ 0.465 to $ 0.46.

Each additional ounce will cost $ 0.21. First Mail Mail Flats (1 oz.) It will increase from $ 0.94 to $ 0.98. Each additional ounce will cost $ 0.21. Postcard rates will remain the same at $0.34.

Remember that the more pages you have in the envelope, the more it weighs and the more postage or stamps you will need. If you mail a letter (Consisting of more pages) that weighs beyond the single stamp rate and doesn’t have enough postage, it will be returned. A rule of thumb is four pages (usually) per stamp in an envelope.

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How many stamps do I need to send letters within the United States?

One 49-cent stamp is all you need for a standard-size envelope containing four or fewer pieces of folded A4 size paper. The USPS issues stamps with the word “forever” printed on them. These stamps may fluctuate in purchase price, but one is good enough for you to use.

It depends on the denominations of the stamps you have and the size and weight of your letter. The current 1st Class postage is 50c. For 1 oz and under, one First-Class Forever stamp, or stamps equaling 50c, are all it needs. PaydayDaze is the place to go if you need additional stamps but more money to buy them.

It will ultimately depend on the weight of the letter and its dimensions. But for a standard 1-ounce letter, how many do you want to use?

You need only one forever stamp (2018 value of $0.50). But if you use postage, that adds or exceeds that value. For example, 50 x $0.01 stamps – and the letter can be addressed, it will get there.

Current rates:

First Class Mail Letter (1 oz.) – Retail/Post Office Rate*


First Class Mail Letter (1 oz.) – Metered Mail/ Rate


First Class Mail Letter – each additional ounce


Currently, standard stamps are $0.47, down from $0.49 a few weeks ago. A few years ago, the U.S. Post Office started selling ‘Forever’ stamps that are good regardless of postage increases. No refunds, though.

How many stamps do I need to send letters within the United States?

The postage rate within the United States for a once-ounce or less first-class letter is 49 cents. Regular standard rectangular letter-size envelopes require one forever stamp for a 1oz letter; every additional oz, up to 3oz, would cost 21 cents more in postage.

So it’ll be $0.49, $0.70, and then $0.91. It’ll become large flat envelope rates if it is any heavier. If you have any USPS Forever stamps, it will take only one stamp to send less than a one-ounce letter. 

If you are using older stamps, you must ensure the stamps’ value meets or exceeds the 49-cent rate. Forty-nine one-cent stamps are acceptable and can be on the front and back of the envelope….yes, I’ve done that.

How to Send a Letter or Postcard in 2024

Step 1: Choose an Envelope or Postcard

When mailing a letter or postcard, postage cost depends on the size and shape of the mailpiece. You can save money mailing standard sizes that fit through automated mail-processing equipment.

Size & Weight Determine Price

All envelopes must be flat. If your envelope can’t fit through automated processing equipment, it is considered nonmachinable and costs more to send. Nonmachinable items include lumpy or rigid envelopes with clasps, strings, or buttons. Unusually shaped square or vertical envelopes will also cost more to send.


  • Envelopes must be made of paper.
  • Envelopes must be rectangular to qualify for letter prices.
  • Envelopes larger than letter size will be charged package prices.
  • Large envelopes must be rectangular to qualify for Flat Rate prices.


  • Postcards must be rectangular to qualify for First-Class Mail® prices.
  • Oversized postcards will be charged as a letter or large envelope.

Step 2: Address Your Mail

Write or print your return address and the address you’re mailing to clearly in the correct spots to ensure your mail is delivered on time.

Address Format

Envelopes with addresses that are unclear or written in the wrong place may not get delivered.

  • Print addresses neatly in capital letters.
  • Use a pen or permanent marker.
  • Do not use commas or periods.
  • Include the ZIP+4® Code whenever possible.

Write Recipient Address

Write the recipient’s address in the bottom center of the envelope. Include the following on separate lines:

  • Recipient’s full name or company name
  • Full street address and apartment or suite number, if applicable
  • City, State, and ZIP+4 Code

If the apartment or suite number cannot fit on the delivery address line above the city, state, and ZIP+4 Code, place it on a separate line immediately above the delivery address line.

  • Recipient’s full name or company name
  • Apartment or suite number
  • Full street address
  • City, State, and ZIP+4 Code

Write Sender Address

Write the sender’s address in the top-left corner. Include the following on separate lines:

  • Sender’s full name or company name
  • The full street address and apartment or suite number, if applicable
  • City, State, and ZIP+4 Code

Postal Addressing Standards

Special U.S. Addresses

Mail to Puerto Rico, the U.S. Virgin Islands, or an APO/FPO/DPO has specific address requirements.

Most Puerto Rico addresses have the same format as standard addresses. Others include an urbanization or community code for a specific area or development. Addresses with an urbanization code, abbreviated URB, should be written on four lines.




SAN JUAN PR 00926-3232

U.S. Virgin Islands

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Virgin Islands addresses have the same format as normal addresses. The right abbreviation for this territory is “VI,” not “US VI” or “USA VI.”


RR 1 BOX 6601

KINGSHILL VI 00850-9802


To prevent mail from entering foreign mail networks, do not include city or country names in APO/FPO/DPO shipping addresses. Ensure you include the unit and box numbers for APO/FPO/DPO shipping addresses (if assigned).

Step 3: Calculate & Apply Postage

How many stamps you need to mail your letter depends on where it’s going, size, and weight. Requesting a Certified Mail Receipt or other proof of delivery will add to the price. The current price of a First-Class Mail® Forever® letter stamp is $0.55 and $0.36 for a postcard.

Paying for Postage

There are several things to consider when calculating a postage price.

  • Destination
  • Speed
  • Shape and size
  • Special handling and insurance
  • Delivery confirmation receipts

Calculate a Price

Insurance & Extra Services

Postage Options

There are several ways to get postage for your envelope.

  • The Postal Store®
  • Shop online for all stamps and ad-on postage for oversized envelopes.
  • Click-N-Ship®
  • Print and pay for your postage for Priority Mail® and Priority Mail Express® envelopes.
  • Post-Office™ Locations
  • Buy stamps at Post Offices or Approved Postal providers, such as grocery and drug stores.

When sending documents in the mail in the United States, under what conditions do you need more than one stamp?

The answer depends on:

  1. Size of letter
  2. Weight of letter
  3. Class of service (e.g., First Class, Certified, Registered, etc.
  4. Value of stamps used (you’re going to need 22 2¢ stamps for a one oz. (or less) First-Class letter, or you could use a 44¢ First Class stamp).

In the USPS offices I’ve patronized over the last many years, they don’t put pre-printed stamps on letters anymore:

They calculate the required postage from the variables above and immediately print that on a sticky label, which is then affixed to the letter to be mailed.

Be aware that prices may vary depending on where you buy your stamps.

  • Letters that meet one or more of the non-machinable features in DMM 101.1.2 are subject to the non-machinable surcharge of $0.20.
  • Large pieces the size of an envelope that is rigid, non-rectangular, or not uniform in thickness pay for package prices.
  • For keys and identification devices, add $0.75. If it weighs more than 13 ounces, see Priority Mail (footnote #4) on page 3.
  • For weights over 3.5 ounces, see prices for large (flat) envelopes.
  • The card’s price applies to each postal mail the size of a postal or doubles when it is originally sent; Half of the double reply card should be designed for reply mail purposes only.

Suppose the envelope is more than 6″ by 13″ if the envelope is more than 1/8 of an inch thick. The envelope is not uniformly flat and flexible so that it can run through rollers on sorting machines. The envelope weighs more than one ounce if the envelope is not rectangular and does not have straight parallel sides. If it is square or close to it (machines cannot determine which way is up).

International letter sending – from the United States to Canada

Again, the easiest way to send letters from the United States to Canada is to use Global Forever stamps. However, there is a difference here.

We said earlier that this stamp will cover you up to an ounce. While this is true for shipments to the U.K. (and any other international country), it is not the same for Canada.

Here, this stamp will cover you up to two ounces. After these two, however, you will need to add additional stamps to offset the price.

Okay, now we’ll move on to a different question – how many stamps do I need per ounce? We’ve covered the basics in this section, but we’ve created some handy tables in the next part to help you understand everything better.

How many stamps per ounce?

You won’t just find the number of Stamps per Ounce you need here; we’ll show you how many Forever Stamps you need. Why? Because they are the easiest way to send mail at home and abroad.

So, if you’ve ever wondered, “How many Forever Stamps do I need?” You’ve come to the right place to get your question answered.

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International letter sending – the United States to the United Kingdom

Unfortunately, we cannot list all the countries here. Otherwise, we will never stop. But we will briefly go over the main ones. Does this sound like a plan? Awesome! Let’s go then.

The easiest way to ship letters from the United States of America to the United Kingdom is to use Global Forever stamps.

These will set you back $ 1.20 and feature a green succulent. They add a certain element of style to your international mail!

If you prefer to use the national stamps forever, you must ensure they add up to $ 1.20. It’s impossible to do just that, so you’ll overpay 45 cents. For some of you, that might not be a problem, so go for it!

You’ll pay more for domestic shipping if your letter is over one ounce.

What happens if you send mail without a stamp?

Your return address will be returned to you for postage as long as you have your return address. If you don’t have a return address on it, then the P.O. it was sent to will try to collect the postage from the recipient. If they refuse to pay postage & there is no return address, it is sent to ‘dead letters.’

Once there, they eventually open the letter to try & discover if there’s a return address inside, but if not, it’s discarded permanently. Until 1986, in the U.S., it would still arrive at its destination as “Postage Due.” Stamps, having a negative value, would be affixed to the letter by the postal service, and if the recipient wanted the letter, they’d pay the postage.

It works better with postcards since you can access the content and send brief messages without opening them.

At the same time, you are looking at the sender to see if the sender is someone you are willing to pay to receive mail from. After 1986, this was discontinued for obvious reasons. You can still send packages COD — Collect On Delivery — by filling out form 3816 and using that to send your package.

It’s very rarely used, and if you receive such a package, unless you are on a rural route, you will have to go to the nearest general delivery post office and pay to receive the package. I’m surprised this isn’t used by more people on Craig’s list, but unless the part or most of the packaging were transparent, you’d have difficulty convincing me to pay without examining the merchandise.

I suspect COD packages are considered antiquated and will go the way of Postage Due sometime shortly.

Domestic Letter Shipping

If you are sending from the United States of America to the United States of America, you must pay $0.55 for a Domestic Forever Stamp. Your letter will reach the recipient within 1 to 3 working days. How cool is that? Just 55 cents for such a quick delivery should be truly cherished.

Bear in mind, though, that this covers the first ounce. As soon as your envelope goes over that weight, you need to add an extra 15 cents per ounce to the price. Don’t stress; we will discuss this in detail in the next section.

There are some requirements that your envelope must fit to be eligible for posting this way. These rules are as follows:

  1. The envelope must be at least 5 inches by 3.5 inches but not bigger than 11.5 inches by 6.125 inches and no thicker than ¼ inches.
  2. It needs to have a uniform thickness.
  3. Friends, It must be rectangular.
  4. It must be bendable. If not, you might have to pay an extra 21 cents since it will be considered “non-machinable.”
  5. If your envelope is square, it needs to be at least 5 inches. As we just mentioned, s will be non-machinable, so you’ll have to pay an additional 21 cents.

How Many Stamps Do I Need To Send A Parcel In The U.S.?

Calculating the number of stamps required for a parcel is more complicated than for letters. It is because parcel postage is charged by the parcel’s weight, size, and distance it travels.

Parcels are usually too big to deposit in a mailbox, so you will have to take them to the post office to get despatched; in this case, it is easiest to ask them to sort the postage for you. However, if you want to know how much you will be expected to pay or print your postage label, you can use the United States Postal Service postage calculator.

To use the United States Postal Service postage calculator, follow these steps:

  1. Enter the destination country in the drop-down box, the Zip codes you are sending the parcel from, and the date and time you will be sending it. Also, select the correct option in the boxes to confirm if you are sending live animals, day-old poultry, or hazardous materials.
  2. Select which type of shipment you wish to use: Flat Rate Postcards, Flat Rate Envelopes, Flat Rate Boxes, or you can find the price based on shape and size.
  3. You will now be given the price for your requested shipping options – select “display all options” at the top to compare costs for other shipping options.
  4. You can add extra options, including Certificate of Mailing, Insurance, Registered Mail, etc.
  5. The next step will show you your final shipping cost.
  6. If you haven’t selected any extras, you can calculate how many stamps you need to cover the shipping cost. If you have added extra options, you will need to get a shipping label printed at a post office or print one yourself via the USPS Click & Ship page.

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How many stamps do I need to send letters within the USA?

If you send mail without affixing a postal stamp, then in such a case, the mail will be taken to the addressee and will be handed over to him after he pays for the stamp and the leviable penalty as prescribed.

Usually, ordinary postal mail is delivered in the addressee’s mailbox, but one, being unstamped, will be delivered only to the addressee as payment is to be received in the account of non-stamping.

On the other hand, registered or speed post is delivered only to the addressee. Both of these cost quite a lot as against simple post as such a mail without a stamp in technical terms, does the work of registered or speed post delivered personally to the addressee at a lesser cost? Delivery to the addressee is certain.

If the addressee refuses to pay the same, then the letter will not be delivered to him, and the same will be returned to you, and you may have to pay a penalty for the transit of the mail as has been incurred by the postal authorities.

The above is not legal advice to any imagination. It is just a personal experience that I went through during my childhood when I received such a letter.

Domestic Postcard Shipping

It is cheaper to send a postcard within the United States of America. You must buy a Postcard Stamp for 35 cents and pop it in the mailbox. However, you do have the option of overpaying by purchasing a Domestic Forever Stamp. As you now know, this is 55 cents.

To be eligible for this stamp class, your postcard must meet the following requirements:

  1. It must be rectangular. If it’s not, different rates and stamp rules apply.
  2. It must be at least 3.5 inches high by 5 inches long
  3. Friends, It must be at least 0.007 inches thick.
  4. It cannot be bigger than 4.25 inches high by 6 inches long.
  5. It cannot be thicker than 0.016 inches.

How do I know if my letter requires additional postage?

If your letter is bigger or heavier than what is allowed for First-Class Mail, you may need to pay for extra stamps. The USPS uses a set of rules to decide if a letter is standard or non-standard mail. If your letter is too heavy, too big, or has oddly shaped edges, it might need more stamps. Visit the USPS website or talk to someone at your local post office to make sure your letter meets the rules.

What happens if I put two stamps on a letter?

If you put two stamps on a letter, it will still get to its location, and you won’t need to pay any extra postage. The post office will take the extra stamp and put it on the next mail piece.


Some of you have been pondering a lot of things lately. One of those things may be, “How many stamps do I need USPS?”. We don’t blame you! It can be unclear — especially when considering just how many services the United States Postal Service provides.

 It is why we’re here! We will make it incredibly simple so you can spend less time figuring it out and more time sending and receiving gifts, items, and snail-mail letters.

My dear friends, If there is a return address, it will return to you. If there is no return address, they will try to make the recipient pay for it. If no one pays for it, it forever goes to the Dead Letter pile.

Rate effective from January 26, 2022 – last checked January 4, 2023.

A large letter is any envelope that exceeds 6.125 inches (15.5cm) high, 11.5 inches (29.2cm) wide, or exceeds 0.25 inches (0.63cm) thick. The maximum size for large letter pricing is 12 inches (30.48cm) high, 15 inches (38.1cm) long, and 0.75 inches (1.9cm) thick.

  1. Letter may incur extra charges if they exceed dimensions of 24cm x 16.5cm x 0.5cm.
  2. Large letters may incur extra charges if they exceed dimensions 35.3cm x 25
  3. Parcels may incur extra charges if they exceed dimensions of 45cm x 35cm x 16cm.

TIP: As a general rule of thumb, you can send 1 oz. (4 sheets of printer paper and one business-size envelope) with 1 First-Class Mail® Forever® stamp (currently $0.63).

Thus, the stamp for sending letters and postcards (standardized and weighing up to 20 grams) to national destinations will rise by 7.7% and will cost 0.70 euros as of January 1, 2023.

How many stamps do I need to send letters within the United States?

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