On this webpage, you will find supporting material, including the "Questionnaire on Well-Being" ("Välmåendeskalan"). The scale is freely available in 31 languages and was originally presented in this open access paper: Hlynsson, J. I., Sjöberg, A., Ström, L., & Carlbring, P. (in press). Evaluating the reliability and validity of the Questionnaire on Well-Being: a validation study for a clinically informed measurement of subjective well-being. Cognitive Behaviour Therapy. https://doi.org/10.1080/16506073.2024.2402992 If you are interested in translating the scale, please contact professor per@carlbring.se before starting. We have a specific procedure, including back-translation, but once that is done, you will be able to use your translation free of charge. **==>>** Please note that there is a correction to the published paper. Although the correction has not yet been published, the updated scripts are now available online here. As soon as the correction is officially published, we will include it here.