The aim of the study is to research how processing numbers correlates with force production. Participants tend to respond softer to smaller numbers and harder to larger numbers. However, the research on these force-numerical associations is limited and might be confounded. Some studies included explicit task instructions on how to respond, thus activating explicit magnitude information, others did not control for spatial information. In the current study we controlled for explicit task instructions and spatial information with the objective to obtain a “purer” measurement of force-numerical associations. For this, we measured continuous grip force fluctuations during a magnitude comparison task. This rather novel method has the benefit that it does not require active responses and thus measures implicit grip force fluctuations during number processing. The results revealed that smaller numbers induced less force than larger numbers. Our findings suggest that force-numerical associations can exist without spatial influences and are automatic.