Free Online T-test Calculator

Group 1 Mean Group 1 Standard Deviation Group 1 Sample Size Group 2 Mean Group 2 Standard Deviation Group 2 Sample Size

Result

T-value	0.00
df (Degrees of Freedom)
SEd (Standard Error of Difference)
Significance Result

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T-test Significance Levels for Different Degrees of Freedom

df	0.1 Level	0.05 Level	0.025 Level	0.01 Level
1	3.078	6.314	12.71	31.82
2	1.886	2.92	4.303	6.965
3	1.638	2.353	3.182	4.541
4	1.533	2.132	2.776	3.747
5	1.476	2.015	2.571	3.365
6	1.44	1.943	2.447	3.143
7	1.415	1.895	2.365	2.998
8	1.397	1.86	2.306	2.896
9	1.383	1.833	2.262	2.821
10	1.372	1.812	2.228	2.764
11	1.363	1.796	2.201	2.718
12	1.356	1.782	2.179	2.681
13	1.35	1.771	2.16	2.65
14	1.345	1.761	2.145	2.624
15	1.341	1.753	2.131	2.602
16	1.337	1.746	2.12	2.583
17	1.333	1.74	2.11	2.567
18	1.33	1.734	2.101	2.552
19	1.328	1.729	2.093	2.539
20	1.325	1.725	2.086	2.528
21	1.323	1.721	2.08	2.518
22	1.321	1.717	2.074	2.508
23	1.319	1.714	2.069	2.5
24	1.318	1.711	2.064	2.492
25	1.316	1.708	2.06	2.485
26	1.315	1.706	2.056	2.479
27	1.314	1.703	2.052	2.473
28	1.313	1.701	2.048	2.467
29	1.311	1.699	2.045	2.462
30	1.31	1.697	2.042	2.457
40	1.303	1.684	2.021	2.423
60	1.296	1.671	2	2.39
80	1.292	1.664	1.99	2.374
100	1.29	1.66	1.984	2.364
1000	1.282	1.646	1.962	2.33