The range number is subject to many parameters including driving style and driving conditions.
If you want to know if your battery is OK, what you want to check is what is its usable capacity.
That number can be extrapolated from the Energy usage screen that shows % of battery used and kWh used.
You need to add the 3 percentage numbers (driving, climate and conditioning) to get the full % used, then you divide the kWh number by that % number, and it gives you the estimated total battery capacity.
For example if you read 71% with 13 kWh used, it means 13 / 0.71 = 18.3 kWh total battery capacity.
That calculation is more reliable if you do it with a high percentage of use, because of the imprecision of the reading.
When you extrapolate the usable capacity from a low %/kWh numbers, the result can easily be off by + or - 1kWh
It will also vary with the temperature, so you want to compute that number across several charge / used cycle to get a feel for what your battery is at.
The nominal usable capacity when the battery is new is supposed to be around 18.4 kWh (even if there are no 100% official numbers).
My Spark has 52kmiles and is more around 16.5 / 17 kWh of usable capacity because of degradation ( I am still monitoring that number as I got the car recently)
How many miles you can do with that capacity will heavily depend on the conditions (speed, temperature, incline...) and your driving style.
The way to measure it, is by looking at the Miles by kWh numbers found on the trip screen behind the wheel, and in the historical energy screen.
In good climate condition with smooth driving, you can be above 5 miles per kWh which would be 92 miles on an 18.4kWh capacity
In poor climate condition and or aggressive driving, you could be around 3.5 miles per kWh which would mean 64 miles on hat same 18.4 kWh capacity
Finally, the range number that will be shown on the screen will be an average of recent historical conditions. I am not sure of the period used to create that average, but on our Volt, it is around 3 or 4 driving days / charge cycle.
So when conditions and or driving style change, the range will only change gradually across a few cycles