diff --git a/src/model/user.rs b/src/model/user.rs
index d5f8a41..e56e611 100644
--- a/src/model/user.rs
+++ b/src/model/user.rs
@@ -24,6 +24,71 @@ use crate::{
     SCHECKBUCH, STUDENT_OR_PUPIL, UNTERSTUETZEND,
 };
 
+mod aequatorpreis {
+    use chrono::{Datelike, Local, NaiveDate};
+
+    use super::User;
+
+    enum AgeBracket {
+        Till14,
+        From14Till18,
+        From19Till30,
+        From31Till60,
+        From61Till75,
+        From76,
+    }
+
+    impl TryFrom<&User> for AgeBracket {
+        type Error = String;
+
+        fn try_from(value: &User) -> Result<Self, Self::Error> {
+            if let Some(birthdate) = value.birthdate.clone() {
+                let today = Local::now().date_naive();
+                let birthdate = NaiveDate::parse_from_str(&birthdate, "%Y-%m-%d").unwrap();
+
+                let age = today.year() - birthdate.year();
+                if age <= 14 {
+                    Ok(AgeBracket::Till14)
+                } else if age <= 18 {
+                    Ok(AgeBracket::From14Till18)
+                } else if age <= 30 {
+                    Ok(AgeBracket::From19Till30)
+                } else if age <= 60 {
+                    Ok(AgeBracket::From31Till60)
+                } else if age <= 75 {
+                    Ok(AgeBracket::From61Till75)
+                } else {
+                    Ok(AgeBracket::From76)
+                }
+            } else {
+                Err("User has no birthdate".to_string())
+            }
+        }
+    }
+
+    fn cat(value: &AgeBracket) -> &str {
+        match value {
+            AgeBracket::Till14 => "Schülerinnen und Schüler bis 14 Jahre",
+            AgeBracket::From14Till18 => "Juniorinnen und Junioren, Para-Ruderer bis 18 Jahre",
+            AgeBracket::From19Till30 => "Frauen und Männer, Para-Ruderer bis 30 Jahre",
+            AgeBracket::From31Till60 => "Frauen und Männer, Para-Ruderer von 31 bis 60 Jahre",
+            AgeBracket::From61Till75 => "Frauen und Männer, Para-Ruderer von 61 bis 75 Jahre",
+            AgeBracket::From76 => "Frauen und Männer, Para-Ruderer ab 76 Jahre",
+        }
+    }
+
+    fn dist_in_km(value: &AgeBracket) -> u32 {
+        match value {
+            AgeBracket::Till14 => 500,
+            AgeBracket::From14Till18 => 1000,
+            AgeBracket::From19Till30 => 1200,
+            AgeBracket::From31Till60 => 1000,
+            AgeBracket::From61Till75 => 800,
+            AgeBracket::From76 => 600,
+        }
+    }
+}
+
 #[derive(FromRow, Serialize, Deserialize, Clone, Debug, Eq, Hash, PartialEq)]
 pub struct User {
     pub id: i64,