Card Size for Trello
Card Size by Screenful is a free Power-Up that allows you to set weights (e.g. hours or story points) for your cards to estimate how much work each card requires. The estimate is shown in the card front. It’s a simple board utility that is free and runs entirely within the Trello UI.
Not all cards are created equal. Size them!
1 Add the Card Size Power‑Up to your board
You can activate this add-on from the Power‑Ups section in the Trello menu. Just go to the IT & Project Management category, scroll down to Card Size by Screenful and add it to your board by clicking the Add button.
2 Select what is shown in the cards
Select what information is shown in front of the card, and in the back of the card. You can choose to show size, spent, and remaining work.
3 Assign estimates to tasks
To assign an estimate for a card, simply click 'Card Size' from the right menu, and enter the estimate to the input field.
If you like to track how much work is done so far, you can also enter the time spent working on that task. The remaining work is automatically calculated for the card.
4 See estimates in card front and back
Depending on your settings, the estimate, spent, remaining - or any combination of them - are shown in the front of the card, and in the back of the card.
5 See totals per list, assignee or label
When you open the Card Size menu, you'll see a list of assignees with the total amount of work assigned to them. Alternatively, you can choose to view totals per label or list.
Here you have it! The minimum viable resourcing for Trello 🙃
See also our other free Power-Ups
What is Card Size by Screenful?
Card Size by Screenful is a simple add-on for Trello that allows you to assign weights for the cards in your Trello board e.g. for estimating how much work is involved in a piece of work.
It’s free and runs entirely within the Trello UI. It is available in the Trello Power-Ups directory.
How do I set an estimate to a Trello card?
After activating the Power-Up, just click the Card Size button within any card on that board. A window opens which allows you to set a weight for the card. The set weight will be shown both on the front of the card and on the back of the card.
Can I see totals somewhere?
After you’ve set weights to some of your cards, you can see the totals in the Power-Up main menu (click the link “Card Size” on top of the Trello UI). You’ll see a list of individuals with the total amount of work assigned to them. Alternatively, you can choose to view totals per label or per Trello list.
Should I update the estimate as the work progresses?
We don’t suggest updating the card weight based on the work done so far. We advise to updated it only in a case you’ve found out that the work is bigger than initially thought.
There is a separate Spent field, which you can use for inputting the work done so far. If you do so, the remaining work is automatically calculated and shown in your cards.
What about the security? Does it access the contents of my Trello cards?
This Power-Up only adds weights to cards. It is a stand-alone Power-Up, which means that there is no 3rd party server involved and therefore no data is sent outside Trello. The card weights are stored within the Trello itself.
How do I add this functionality to my board?
It’s easy, here’s direct link for adding this free Power-Up to your board. You can inactivate it any time.
I added the Power-Up but nothing changed on my board
Notice that this Power-Up doesn’t work on Internet Explorer. Use it with Chrome, Safari, or Firefox.
Does everyone in my team need to install this Power-up?
No. When anyone within your team installs this Power-Up, it becomes available to everyone who has access to that board.
If I'm in Trello Gold and add a non-Gold member to the board, will that member have access to this Power-Ups on my board?
Yes, as long as you are the one to add the Power-Up to the board, everyone on the board can use them.
Can I choose what information is shown in cards?
Yes, you can choose to show any combination of size, spent, and remaining as badges in the front of the card and in the card details. You can select the badges by clicking Settings in the main menu.
Is it really free?
We will keep this Power-Up free for the foreseeable future. After all, it's just a single feature so we think it should be free.
How can I get help?
You can always send email to firstname.lastname@example.org. We'll answer promptly.