ABSTRACT Objective: The aim of the study was to assess whether the modified Bristol Stool Form Scale (m‐BSFS) is reliable, valid and user‐friendly to use by parents, grandparents, and day childcare employees to evaluate stool consistency in toilet and nontoilet‐trained toddlers in the Netherlands. Study design: Translation to Dutch and validity of the m‐BSFS (scoring 32 general stool pictures) for 1 to 3 year old toddlers (n = 89) was evaluated by parents, grandparents, and day childcare employees. A subgroup of participants scored an additional 7 pictures of stools in a diaper to validate the m‐BSFS for non‐toilet‐trained toddlers (n = 16). To determine inter‐rater reliability, 2‐way random effects single‐rater intraclass correlation coefficient (ICC) consistency was used. Intra‐rater reliability was measured by Cohen kappa (κ) by rating the same pictures in random order twice, with at least 1 week between the first and second scoring. Results: Inter‐ and intra‐rater reliability of the m‐BSFS were above recommended minimal standards of 0.61 for the 32 general stool pictures as well as for the 7 pictures of stools in a diaper. ICC consistency for the general stool pictures of the first and second ratings were 0.71 (n = 89) and 0.79 (n = 77), respectively, with a κ of 0.71 (n = 77). ICC consistency for the stools in diaper pictures of the first and second ratings were 0.93 (n = 16) and 0.93 (n = 15), respectively, with a κ of 0.77 (n = 15). Conclusions: The m‐BSFS is reliable, valid and user‐friendly to use by Dutch‐speaking parents, grandparents, and day childcare workers to evaluate stool consistency in both toilet‐ and nontoilet‐trained toddlers in the Netherlands.