To convert Jeff's height from centimeters to feet, use the given ratio of 1 foot = 30.48 centimeters.
First, divide Jeff's height in centimeters by the number of centimeters in a foot:
\[ \text{Height in feet} = \frac{\text{Height in centimeters}}{\text{Centimeters per foot}} = \frac{183 \text{ cm}}{30.48 \text{ cm/foot}} \approx 6.0236 \text{ feet} \]
Now, round this to the nearest whole number:
\[ 6.0236 \text{ feet} \approx 6 \text{ feet} \]
Therefore, Jeff is approximately 6 feet tall.