The cost of your seat
The starting point is the cost per plate at the venue. City receptions run considerably higher than countryside ones, and children usually count as half a cover.
One unwritten rule holds nearly everywhere: your gift covers at least the cost of your own seat, then rises with how close you are to the couple. Set the cost per plate, say how many of you are going, and get an honest range instead of an invented number.
A typical figure for that kind of venue. If you know where the reception is, enter the real cost — the result gets far more accurate.
Venues normally charge about half for a child.
No fixed tables, no numbers pulled from thin air. Three factors — the same ones anyone runs through in the car on the way to the reception.
The starting point is the cost per plate at the venue. City receptions run considerably higher than countryside ones, and children usually count as half a cover.
A colleague generally covers the cost of their plate. A close friend goes about half again above it. The wedding party and godparents sit in their own bracket, at roughly double or more.
You get three thresholds — sensible minimum, recommended and generous. Custom is not a price list, and a single number would claim precision this question does not have.
The same arithmetic runs backwards: multiply the average gift by the number of confirmed guests and see how much of the catering it covers. In EventHub the guest list, the replies and the budget live in one place, so the estimate updates itself as people answer.
Plan the wedding budget