We are pleased to introduce our online solar reflectance index (SRI) calculator. The current version is V1.1.0. Click the screenshot below to access this online calculator.

Features:
- No download or installation required.
- The calculator works in all mainstream browsers with javascript enabled.
- User friendly and responsive
- In fact, you don’t need to click the “Calculate SRI” button and the results are updated instantly after your changes.
- Full compliance to ASTM E1980
- Accuracy has been validated with other independent codes. Eq. 1 of ASTM E1980 is solved iteratively.
- Informative
- Surface temperatures and SRIs of all 3 conditions are displayed side-by-side and with options of 3 temperature units
Feedback and comments
We will improve this calculator regularly. If you have feedback and comments, please let us know.