Here is an easy to use chart.
The chart is based on
65 MPH and a gear ratio of 1:1, on a manual transmission in 4th gear.
If you have an automatic transmission your RPM will higher due to slippage
in the transmission and the torque converter. With an overdrive transmission
your RPM in overdrive will be 15% to 30% less than indicated.
I have a daily driver and like to stay in that category. According to this chart,
35's with 4.88's is on the high side of the Daily Driver, leaning on the power side
at 3045 RPM's in 4th gear with a manual tranny