ChemCalc A Think & Engage Brand

Connecting Trello to ChemCalc

A step-by-step guide for ChemCalc Pro users

About five minutes, start to finish. You'll need two browser tabs open — Trello and ChemCalc — for Steps 1 through 3.

What this does

Once connected, any estimate you build in ChemCalc can be sent to a Trello card with one click.

The card will include:

  • Client name
  • Vessel info
  • Scope of work
  • Task hours
  • Grand total
  • Direct link back to the estimate

What you will need

  • A Trello account — free at trello.com
  • A Trello board with at least one list already set up (e.g., "New Estimates" or "Leads")
  • A ChemCalc Pro account

  1. Step 1 — Get your Trello API Key

    1. Go to trello.com/power-ups/admin
    2. Click New Power-Up in the top right corner
    3. Fill in any name (e.g., "ChemCalc"), select your workspace, and click Create
    4. On the next screen, click API Key in the left sidebar
    5. Your API Key will be displayed at the top of the page — copy it and keep this tab open

    Your API Key is not a password, but treat it like one. Do not share it publicly.

  2. Step 2 — Open My Business Info in ChemCalc

    1. Log in to your ChemCalc account at chemcalc.co/estimate.html
    2. Click My Business Info at the top of the page
    3. Scroll down to the Trello Integration section

  3. Step 3 — Enter your API Key and Authorize

    1. Paste your API Key into the Trello API Key field
    2. Click Authorize Trello
    3. A Trello popup will open asking you to confirm access — click Allow
    4. The popup will close automatically and ChemCalc will confirm the connection

    If the popup does not open, check that your browser allows popups for chemcalc.co.

  4. Step 4 — Select your Board and List

    1. Once authorized, a Board dropdown will appear
    2. Select the Trello board you want estimates sent to
    3. A List dropdown will appear — select the list within that board
    4. ChemCalc saves your choice automatically — look for “Board and list saved.” under the dropdowns

  5. Step 5 — Send an Estimate to Trello

    1. Build your estimate as normal
    2. Click the Add to Trello button
    3. ChemCalc will create a Trello card containing the client info, vessel, scope of work, task hours, and a direct link back to the estimate

Troubleshooting

Problem Fix
Popup does not open Allow popups for chemcalc.co in your browser settings
"Could not load boards" error Your API Key may be incorrect — double-check Step 1
Board dropdown is empty Make sure you have at least one open board in your Trello account
Card was not created Confirm a board and a list are both selected and that you saw “Board and list saved.” before trying again
Token expired Click Authorize Trello again to get a fresh token

Connected? Send your first card.

Open the Repair Estimator, build a quote, and use Add to Trello.

Open the Estimator