Useful tools for your real estate website
Give clients a fast answer to two questions that repeatedly reach a Washington agent's inbox. Use the calculators here or put them on your own site free—with one line of code.
- King · Snohomish · Pierce · Whatcom
- No account or API key
- Updates automatically
- Phone-friendly
Free agent website toolkit
Copy it. Publish it. Check it privately.
Add either calculator in about five minutes. No account or API key. When private installation checking is available, the website hostname and check key stay out of the copied iframe URL. If it is temporarily unavailable, Sentinel automatically copies the same working calculator without the private check.
- 1Enter your website
- 2Copy and publish
- 3Verify on your public page
Example: rainierrealty.com. Enter a public website, not a name, phone number, street address, email, client detail, or private/local site.
You may copy a no-check version, but Sentinel cannot record a matching website-origin request.
Choose your website platform
WA REET calculator
Graduated Washington excise tax plus the county-level local portion, calculated by deterministic code.
View the exact no-check iframe code
<iframe src="https://sentineliq.net/embed/reet" width="100%" height="830" style="display:block;border:0;width:100%;max-width:760px" title="Washington REET Calculator by SENTINEL" loading="lazy" referrerpolicy="strict-origin-when-cross-origin"></iframe>
NWMLS deadline calculator
A planning view of common contract deadlines with Washington business-day support and clear verification reminders.
View the exact no-check iframe code
<iframe src="https://sentineliq.net/embed/nwmls" width="100%" height="1160" style="display:block;border:0;width:100%;max-width:760px" title="NWMLS Deadline Calculator by SENTINEL" loading="lazy" referrerpolicy="strict-origin-when-cross-origin"></iframe>
Prefer not to touch your website?
Send us your website platform and the calculator you want. We'll help install it free.
What agents need to know
Can a Washington real estate agent put these calculators on their own website?
Yes. Copy the provided iframe into a WordPress, Wix, Squarespace, or custom website. No account or API key is required.
Which Washington counties are supported?
The public toolkit supports King, Snohomish, Pierce, and Whatcom counties. The calculators display their assumptions and verification reminders.
The calculators are only the beginning
SENTINEL is one chat that works with your business context to research properties, explain source-dated micro-market conditions, run seller math, organize transactions, and turn what you are viewing into a next action. Built for agents working King, Snohomish, Pierce, and Whatcom counties.