How It Works
The calculator divides your total guest count by the average number of guests per invitation based on your mailing style. It then calculates all the paper goods and postage you need, including a 10% buffer for addressing mistakes.
- Enter your total guest count (everyone invited).
- Choose invitation style — individual, couples, or families.
- Select whether you want physical RSVP cards or online-only.
- Optionally add inner envelopes for a formal look.
Invitation Quantities by Guest Count
| Guests | Individual | Couples | Families |
|---|---|---|---|
| 50 | 50 | 25 | 15 |
| 100 | 100 | 50 | 29 |
| 150 | 150 | 75 | 43 |
| 200 | 200 | 100 | 58 |
| 300 | 300 | 150 | 86 |
Postage Costs Guide
| Envelope Type | Weight Limit | Stamp Cost (2024) |
|---|---|---|
| Standard letter (1 oz) | 1 oz | $0.73 |
| Square envelope | 1 oz | $0.97 (non-machinable surcharge) |
| Oversize / heavy (2 oz) | 2 oz | $0.97 |
| Oversize / heavy (3 oz) | 3 oz | $1.21 |
Tips for Ordering
- Order 10-15% extra: Address mistakes, last-minute additions, and keepsake copies.
- Weigh before stamping: Take a fully assembled invite to the post office to confirm postage.
- Square envelopes cost more: USPS charges a non-machinable surcharge for square or unusually shaped envelopes.
- Consider online RSVP: Skip RSVP return envelopes and stamps to save $50-$100+.
- Mail 6-8 weeks before: Standard timeline for formal weddings; 4-6 weeks for casual.
FAQ
How many invitations do I need for 150 guests?
If most guests are couples, you need about 75 invitations. For mostly families, about 43. Add 10% extra for mistakes and keepsakes.
Do I need to pre-stamp RSVP envelopes?
Yes. Pre-stamping RSVP return envelopes is standard etiquette and significantly increases your response rate. Guests are more likely to mail back a pre-stamped card.
When should I mail wedding invitations?
Mail invitations 6-8 weeks before your wedding date. For destination weddings, send 10-12 weeks in advance. Set the RSVP deadline 3-4 weeks before the wedding.
Related Tools
- RSVP Estimator — predict how many guests will say yes
- Guest Estimator — predict total headcount from guest categories
- Wedding Favor Calculator — quantities and budget per guest
- Wedding Budget Calculator — allocate your total budget by category
Prices shown are approximate 2026 U.S. averages and may vary significantly by region, retailer, and market conditions. Always get local quotes for accurate pricing.