# Unit conversion doesn't work for pressure in (m, kg, s, C) unit system **URL:** \ **Category:** Bug Reports\ **Created:** [October 11, 2022, 9:17am UTC](https://prepomax.discourse.group/t/unit-conversion-doesnt-work-for-pressure-in-m-kg-s-c-unit-system/448 "2022-10-11T09:17:30Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [October 11, 2022, 9:17am UTC](https://prepomax.discourse.group/t/unit-conversion-doesnt-work-for-pressure-in-m-kg-s-c-unit-system/448/1 "2022-10-11T09:17:30Z")
Hi, I’ve noticed that the built-in unit conversion doesn’t work for pressure when the (m, kg, s, C) unit system is used and thus the default unit is Pa: ![unit conversion](https://global.discourse-cdn.com/free1/uploads/prepomax/original/1X/2abf1414bc6e92cdfd7cb0642db0b87bc4ac0d47.png) With other units and unit systems there’s no such issue. What’s more, when I enter a large number to define Young’s modulus in Pa units (210000000000 Pa for steel), it disappears and is replaced with 0 Pa. ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [October 12, 2022, 4:10pm UTC](https://prepomax.discourse.group/t/unit-conversion-doesnt-work-for-pressure-in-m-kg-s-c-unit-system/448/2 "2022-10-12T16:10:10Z")
This is indeed a bug. I was playing around with support for equations in the pressure converter. I have fixed the bug and I am closing the topic. ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [October 12, 2022, 4:10pm UTC](https://prepomax.discourse.group/t/unit-conversion-doesnt-work-for-pressure-in-m-kg-s-c-unit-system/448/3 "2022-10-12T16:10:18Z")