Identify the grading system used
Check whether the route is bouldering, sport climbing, trad climbing, or alpine climbing
Read the number or letter grade assigned to the route
Compare the grade to known grades you have climbed
Use the grade to estimate difficulty, not exact performance
Note that grades can vary by region and gym
Note that grades can vary by setter, guidebook, and rock type
Look for modifiers such as plus, minus, or decimal points
Look for additional danger or commitment ratings
Look for aid, mixed, ice, or alpine-specific symbols
Read any route notes for length, style, and protection
Treat grades as a general benchmark rather than an absolute measure