The objective of this study is to compare and analyze the grip dynamometers developed by our research team with widely used devices in the research field and commercially available devices for grip strength assessment. Various studies on grip strength have been conducted, with a majority focusing on the correlation between grip strength and health. Prior to this, a study was conducted to verify the validity of the equipment. To achieve the study’s objective, three dynamometers widely used commercially and in research were selected and compared with the grip dynamometer K-Force (Humanmecha Ltd., Korea). For the comparative analysis of the equipment, a customized jig was fabricated to hold the grip dynamometer in place and apply a consistent force. Analysis of variance (ANOVA) was used to examine significant differences in the forces measured by each device under various loads. Statistical analysis confirmed that K-Force showed no statistically significant differences from the applied loads, while other grip dynamometers exhibited statistically significant differences. In this study, we demonstrated that K-Force is suitable for measuring grip strength and the strength of each finger. On the basis of the results of this study, K-Force will be actively utilized in future research to explore the correlations between grip strength and various diseases.