# \#value-modifier **URL:** https://community.gravityforms.com/tag/value-modifier/2833.md [Latest](https://community.gravityforms.com/latest.md) · [Categories](https://community.gravityforms.com/categories.md) · [Tags](https://community.gravityforms.com/tags.md) --- ## [Tonnage calculation](https://community.gravityforms.com/t/tonnage-calculation/17298)
**Author:** [@dahn](https://community.gravityforms.com/u/dahn)\ **Replies:** 2\ **Last updated:** [April 18, 2024, 3:45pm UTC](https://community.gravityforms.com/t/tonnage-calculation/17298 "2024-04-18T15:45:29Z")
I’m trying to calculate tonnage for a client but I’m not sure how to set up one of the fields. The formula is this: Width x length / depth x material poundage / 2,000 = tonnage needed I got it to work BUT for the dept…