<p>Which one is grammatical correct “Between 1800 to 1900” or “Between 1800 and 1900”</p>
<p>It is " between…and…" and “from…to…” Try to use it in a different sense and you will see why between does not work with to: “Between you and me, dates are confusing.” If “to” doesn’t work in that context, it also will not work in the one you gave.</p>
<p>and… 10 char</p>