How to build a wedding seating chart for 150 guests

How many tables do 150 guests need?

At 10 guests per round table, 150 guests need exactly 15 tables; at 8 per table you need 19 tables (150 ÷ 8 = 18.75, rounded up), and at 12 per table you need 13 (150 ÷ 12 = 12.5, rounded up).

Always round up, because you cannot set 0.75 of a table. Rounding up leaves a few empty seats, and that is useful: it is the room you will need when a plus-one appears or a late reply comes in. Tables of 10 are the one size where 150 divides evenly, which is why they show up so often in examples, but the right size is the one your room holds comfortably.

Then add your head table or sweetheart table. If you plan a head table for you, your partner, and the wedding party, those people come out of the 150 first, and the rest are seated at guest tables. A sweetheart table for two works the same way: 148 guests left, which is 15 tables of 10 with 2 seats to spare, plus the sweetheart table itself, so 16 tables in the room.

The table count at each table size

The chart below does the division for you at five table sizes, and shows how many seats you would leave empty with every one of the 150 guests seated.

Read the third column as a margin, not as waste. Two empty seats across 19 tables is a tight room, where a single late addition can force you to rearrange. Six empty seats across 13 tables of 12 gives you slack. The numbers are plain arithmetic, so use your own table sizes if your venue’s differ from these examples.

These sizes are examples, not rules. How many chairs fit around a table depends on the table and the room, so ask your venue and your rental company what they recommend for each shape before you commit to a count. Do not assume that any size you read online fits your space.

How to pick a table size for your room

Pick the table size by asking your venue how many tables the floor holds with room for servers, a dance floor, and the head table, not by choosing the guests-per-table number you like best.

Start with the venue’s capacity answer, then work backward. If the room comfortably holds 16 tables with a dance floor, that rules out 19 tables of 8 and points you toward 10 or 12 per table. If you want a larger dance floor or a buffet line, you may need fewer tables, which means more seats at each.

• Tables of 8: easier conversation, more tables to fit, more centerpieces and more table numbers to print.
• Tables of 10: a good middle for 150, and the cleanest math, with 15 tables and no spare seats.
• Tables of 12: fewer tables and more floor space, but harder to talk across, and a single large family fills a table fast.
• Long tables: a few long tables of 16 would mean 10 tables for 150, with 10 empty seats. Ask the venue how many people really fit along each side.

You can also mix sizes. A few tables of 12 for large families and tables of 8 for friend groups is common, and it lets you fit your actual groups instead of forcing everyone into the same number. The only rule is that the total of seats is at least 150, with some margin.

Group your guests before you seat anyone

Seat households and groups, not individuals: 150 guests are really a smaller number of couples, families, and friend groups, and each unit moves together.

Start with households, because a couple or a family with kids should never be split. Then sort the households into circles: your family, your partner’s family, college friends, work friends, neighbors, family friends. A circle of 8 to 12 people is a natural table. A circle of 4 is not, and that is where the next step comes in.

Write down the leftover groups too: the three coworkers who only know each other, the two cousins who have not met the rest of the family. These small groups are the pieces you use to fill the last seats at every table, so do not treat them as a problem. In your guest list, categories such as family and friends, and an age range for each person (adult, teen, child, baby), are already the way to sort this, and guests are listed by household.

The order to seat 150 people in

Seat in a fixed order: the head table first, then parents and grandparents, then your largest groups, and the leftover singles and small groups last.

1. Head table or sweetheart table. These are fixed, so remove those people from the unseated pool right away.
2. Parents and grandparents. Place their tables close to the head table, and away from the speakers and the dance floor if they would rather talk. If your parents are divorced, plan that table with care, as in seating divorced parents at a wedding.
3. Close family tables. Siblings, aunts, uncles, and cousins, grouped by branch of the family.
4. Your biggest friend groups. College friends, the old hometown group, work friends. Each large group gets its own table or two.
5. Small groups and singles. Use them to fill the empty seats at the tables above, mixing people who have something in common.
6. Check the corners. The tables nearest the speakers, the kitchen door, or the bar are the ones to review last. Put people there who will not mind.

The reason for this order is that the hardest placements come first, when you still have every table open. Placing the easy groups first leaves you at table 14 with a stubborn pair of aunts and nowhere to put them.

Work with the whole picture on screen. In the app you place guests on a visual chart of your room by drag and drop, so you can see which tables still have space while you work, and you can keep more than one plan for the wedding, for example one for the ceremony and one for the dinner.

Rules between guests: always together, never together

Write your rules down before you place anyone: who must sit together, who must not, and who you would prefer to keep close or apart.

With 150 people there are always a few, and they are easy to forget halfway through. The app lets you set four kinds of rule between guests: always together, never together, rather together, and rather apart. An automatic placement takes those rules into account, so you can ask it for a first draft and then adjust it by hand.

A first draft is only that. Look at it table by table, move the guests who look wrong, and keep your hard rules in mind, because you know your families and the software does not. For the sensitive cases, such as former partners, feuding relatives, or a guest who does not know anyone, decide with the people involved before you place them.

Check the chart against your RSVPs

Before you lock the chart, compare the seated guests against your replies, and seat only people who said yes, with the others held in a separate list.

Each guest in the placement lists shows their reply: attending, declined, or waiting. Seat the confirmed guests first. Keep the “waiting” guests visible so you can place them on a provisional basis, and do not give a seat to someone who declined. This is also how you catch the most common error at this size, which is a table of 10 that has quietly become a table of 12 because two people were counted twice.

If guests reply online on your published wedding website, their answers feed the guest list and the seating chart. When someone answers by text or phone, you enter the reply yourself and you can see who has not answered. Following up is on you: the app sends nothing to your guests. A short message does the job: “Hi (first name), we’re finalizing the seating chart on (date). Can you let us know if you’re coming?”

Run the count one more time at the deadline. Total seated, plus declined, plus waiting, should equal your guest list. If it does not, a household is missing somewhere. The guide on the final headcount for your caterer walks through that last count and what to do about late changes.

Give the venue and caterer a plan to scale

Hand your venue and caterer a printed seating chart drawn to scale, with a list of who sits where, so nobody has to guess how a room of 150 fits together.

The app prints the chart to scale on Letter paper, which is easy to copy and mark up. When you print it, you can add an alphabetical list of the guests who are seated with their table number, and one sheet per table listing its guests. The alphabetical list is the one you want at the welcome table, and the per-table sheets are what the venue team reads. Table numbers, place cards, and a printed program also come from the app’s printables.

For the kitchen, the seating chart is only half of the story: the caterer also needs entrées and dietary needs by table, which is covered in how to give your caterer a seating chart with meal choices. Ask your caterer for the cutoff date first, and plan to finish the chart a few days before it.

Doing this in MyWedding Planner

In MyWedding Planner you build the seating chart on a visual plan of your room, with round and rectangular tables, joined modules, and obstacles, and you place guests by drag and drop.

You enter the room’s dimensions in meters or in feet and inches, add your tables, and drag each household in. Each guest shows their reply in the placement lists, you can set the four kinds of rules between guests, and an automatic placement respects them. On a phone you can view the plan; to edit it, use a wide screen such as a computer or a tablet held sideways.

The seating chart has no limit during the trial, which needs no card. The share link for your caterer or venue is part of the one-time payment of €69, which also covers publishing your wedding website.