diff --git a/packages/amis-ui/scss/_mixins.scss b/packages/amis-ui/scss/_mixins.scss
index f25ccd619..1f6b515de 100644
--- a/packages/amis-ui/scss/_mixins.scss
+++ b/packages/amis-ui/scss/_mixins.scss
@@ -450,7 +450,7 @@
     border: none;
     color: var(--Form-input-color);
     width: 100%;
-    height: calc(var(--Form-input-lineHeight) * var(--Form-input-fontSize));
+    height: var(--Form-input-lineHeight);
 
     &::placeholder {
       color: var(--Form-input-placeholderColor);