Warm up your voice gently for a few minutes
Start at a comfortable note in your speaking or singing range
Sing lower notes one by one until you reach the lowest note you can produce clearly
Sing higher notes one by one until you reach the highest note you can produce clearly
Record the lowest and highest notes you can sing without strain
Use a piano, keyboard, or tuning app to identify each note
Repeat the test on different days to confirm your range
Note the difference between your comfortable range and your extreme range
Separate chest voice, mixed voice, and head voice if needed
Avoid pushing, straining, or forcing notes outside your comfort zone