Voltage measurer 5V

#include<LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 7, 6, 5, 4);
int pomiar=A0;
int odczyt;

void setup() {
  Serial.begin(9600);
  lcd.begin(16, 2);
  lcd.print("Napiecie wynosi:");
}

void loop() {
  int sensorVoltage=analogRead(pomiar);
  float voltage = sensorVoltage * (5.00 / 1024.00);
  lcd.setCursor(0, 1);
  lcd.print("U=" + (String)voltage + " V");
  Serial.println(voltage);
  delay(1000);
}