Bell Curve Grade Calculator

Rescale scores to a chosen class average and standard deviation (bell curve) and see the curved grade for each student.

New class average78.0%Was 76.1% · 12 students

Curved scores
#	Raw	Curved	Change
1	58	62.9	+4.9
2	64	67.9	+3.9
3	71	73.8	+2.8
4	77	78.8	+1.8
5	80	81.3	+1.3
6	83	83.8	+0.8
7	85	85.4	+0.4
8	88	87.9	-0.1
9	90	89.6	-0.4
10	72	74.6	+2.6
11	66	69.6	+3.6
12	79	80.4	+1.4

Flat and scale curves keep the ranking and help everyone; the square-root curve lifts low scores most. Tell students which method you use.

Frequently asked questions

Is my data uploaded?

No. The calculation runs entirely in your browser — nothing you type is sent to a server.

Is it free?

Yes — free, unlimited and no sign-up.