Il numero 1800, milleottocento in Italiano, in Inglese si dice one thousand eight hundred.
Il numero ordinale 1800° in inglese si dice one thousand eight hundredth.
1791: one thousand seven hundred ninety-one
1792: one thousand seven hundred ninety-two
1793: one thousand seven hundred ninety-three
1794: one thousand seven hundred ninety-four
1795: one thousand seven hundred ninety-five
1796: one thousand seven hundred ninety-six
1797: one thousand seven hundred ninety-seven
1798: one thousand seven hundred ninety-eight
1799: one thousand seven hundred ninety-nine
1801: one thousand eight hundred one
1802: one thousand eight hundred two
1803: one thousand eight hundred three
1804: one thousand eight hundred four
1805: one thousand eight hundred five
1806: one thousand eight hundred six
1807: one thousand eight hundred seven
1808: one thousand eight hundred eight
1809: one thousand eight hundred nine