I am a trello user, If there is any limits on list or cards?

[Leo Lam]

Any limits

[Petter Gonçalves · Accepted solution]

Hello Everyone,

We now have an official Atlassian page that describes the limits for Trello objects:

Trello Limits 

According to that page, the following limits are applied:

Board-level Limits:

• Total members: 1520
• Open cards: 5000
• Total cards (including archived): 2.000.000
• Open lists: 475
• Total lists: 2.850
• Labels: 950
• Checklists: 15200

Card-level Limits:

• Attachments: 950
• Checklists: 475
• Stickers: 67

Webhooks and Limits:

​In addition to limiting the number of different types of objects that can exist on a board or card, we disallow creating new webhooks on objects that have exceeded their limits.

Attempting to create a webhook on an object that has exceeded its limits will result in the following error message: HTTP/1.1 500 Model exceeds limits.​ Webhooks that exist on models that have a limit status of maxExceeded will be deleted.

Regards,
Petter Gonçalves - Atlassian Support

[Oscar Triscon · Accepted solution]

Yes, there are limits to the total number of lists and cards on a board (along with other things such as number of members, checklists, labels). These limits may vary depending on your type of account and other factors that  are at Trello's discretion. Typical values are:

• Open cards: 4,750
• Total cards (including archived): 1,900,000
• Open lists: 475
• Total lists: 2,850
• Labels: 950
• Checklists (including on archived cards): 1,900,000
• Custom fields: 48
• Attachments: 34,200
• Members: 1,520

(Note I'm not an employee of Trello, and thus this is not official information. These limits are subject to change. Trello does warn when a board is about to reach some limits.)

[Leo Lam]

Thank you Oscar! The answer is good enough

[Keruchan]

Does the list limit only for open list? Not including archive?

Also attachment is that limit 34,000 per card?

[milynnus]

@Oscar Triscon 

Do you know the limits on checklist items per checklist?

Also using the cascade for each card from item...how many iterations it will perform at any one time.

Thanks