Area Under The Normal Curve Calculator

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Lower Tail Upper Tail Range

StdDev (non-range or lower StdDev for range):
StdDev2 (upper StdDev for range):
 

The area between StdDev = -1 and StdDev = 1 under the normal distribution is 0.682689478739

Notes:
1. Use the Home link to return to the home page. Do not use the back button.
2. User input can be any constant statement using only numerics and +, -, *, and /.
3. For upper or lower tail the StdDev2 field is ignored.