Optical & Thermal Calculators

New!Download our 56-page  2020 edition laboratory profile  to understand more about our capabilities.

We develop and maintain the following user-friendly online optical & thermal calculators, for our customers to experiment with a few important optical & thermal properties.

Online ETTV U-value calculator

Online ETTV U-value calculator

Online glass U-value calculator

Online glass U-value calculator

Online solar reflectance index (SRI) calculator

Online solar reflectance index (SRI) calculator

Looking for a professional optical & thermal testing lab?

Please visit our optical & thermal testing laboratory page. Our lab is SAC-SINGLAS (ISO 17025) accredited and our customers are from more than 20 countries.

Choose OTM.

Work with the expert in Optical & Thermal Measurement solutions.