diff --git a/components/calcValues.vue b/components/calcValues.vue
index ac898c3..7e2a7df 100644
--- a/components/calcValues.vue
+++ b/components/calcValues.vue
@@ -57,7 +57,7 @@ const form_refs = {
 }
 
 const changeParametres = () => {
-    // console.log(form_state.total_length * 1000, copy_form_state.total_length * 1000)
+    // console.log('form', form_state.total_length * 1000, 'copy', copy_form_state.total_length * 1000)
 
     const lamelles = Math.floor(form_state.height / parametric.height.step)
 
@@ -188,7 +188,7 @@ const goal = (target: string, params: object) => {
                 <div class="form-row">
                     <div class="form-item">
                         <label for="total_length">Общая длина забора, м</label>
-                        <input type="number" id="total_length" v-bind="parametric.total_length"
+                        <input type="number" id="total_length" v-bind="parametric.total_length" min=0
                             v-model="form_state.total_length" :ref="form_refs.total_length" />
                     </div>
                     <div class="form-item xl:w-2/4 text-sm xl:text-base">