Merch size and quantity calculator
Enter how many people need merch and get an order total with spares and a size split for each group, ready to paste into a quote or download as a spreadsheet. Free, no sign-in, and nothing you type leaves your browser.
- Cost
- Free, no sign-in
- Plans
- Several groups at once
- Exports
- CSV or plain text
Order this many
108
for 100 people
Attendees
108 pieces
8 spare pieces, rounded up to a multiple of 6. A sized garment cannot be re-run for one person, so the spare covers size guesses as well as damage.
| XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|
| 3 | 14 | 29 | 29 | 21 | 10 | 2 |
Collecting real sizes?
Paste this into your registration or sign-up form:
What shirt size should we order for you? (XS, S, M, L, XL, 2XL, 3XL)
How the size split works
The split uses the same planning curves as the blankup quote form and the size breakdown guide. Pieces are shared out so the sizes always add up to the order total, with any leftover going to the middle of the run first.
| Group | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| General adult | 3% | 13% | 27% | 27% | 19% | 9% | 2% |
| Student group | 6% | 20% | 31% | 25% | 12% | 5% | 1% |
| Mixed event | 3% | 12% | 27% | 28% | 19% | 9% | 2% |
Real sizes always beat a curve. The size breakdown guide explains when to collect them instead. For a repeat group, a blankup workspace can collect each person's size with a link, and the size guide has the measurements for each blank.
How spares are calculated
These are the rules a blankup workspace uses for recommended spares. Groups under 24 people get a proportionate spare with no pack rounding instead, and "Exact headcount" orders the headcount only, raised to the 3-piece minimum per design and color for apparel.
- Sized apparel (tees, hoodies, crewnecks)
- About 5% extra and at least 6 pieces, then rounded up to a multiple of 6. A sized garment cannot be re-run for one person, so the spare covers size guesses as well as damage.
- One-size apparel (caps, beanies)
- About 4% extra and at least 4 pieces, then rounded up to a multiple of 6. One size fits most, so the spare only covers damage and late additions.
- Accessories (lanyards, bags, bottles)
- About 5% extra and at least 5 pieces, then rounded up to a multiple of 25. Accessories come in packs, so the spare covers loss on the day.
- Giveaways (stickers, pins)
- About 15% extra and at least 25 pieces, then rounded up to a multiple of 50. Giveaways get taken by the handful, so the spare is larger.
Common questions
For sized apparel the recommended setting adds about 5 percent, at least 6 pieces, and rounds up to a multiple of 6, because a sized garment cannot be re-run for one person. Groups under 24 people get a smaller, proportionate spare instead. For a small team whose sizes you already know, choose Exact headcount and add a spare or two yourself.
Yes. Each design and color of apparel is its own run with its own minimum of 3 pieces, so attendee tees and staff tees are planned as separate groups. Many accessories need a bulk order instead, which your written quote confirms.
Any curve is an assumption, so collect real sizes when you can. Pick the closest group type, turn off sizes your blank does not come in, and paste the sign-up question into your registration form.
No. The calculator only counts pieces. Pricing depends on the blank, the decoration, the quantity and the timing, and comes in a written quote, usually within one business day.
No. Everything is calculated in your browser. Nothing you type is stored or sent unless you choose to request a quote.
Share this calculator
Writing an organizer guide or a resource list for your club or event? You are welcome to link to the calculator.
<a href="https://blankup.org/merch-size-calculator">Merch size calculator</a>