Standard Z Critical Value Calculator

An online std. z critical value calculation and formulas.

Probability Value (α)

     

Z Critical Value Table

z	Probability (Area under Curve)
0.01	-2.3263
0.02	-2.0537
0.03	-1.8808
0.04	-1.7507
0.05	-1.6449
0.06	-1.5548
0.07	-1.4758
0.08	-1.4051
0.09	-1.3408
0.10	-1.2816
0.11	-1.2265
0.12	-1.175
0.13	-1.1264
0.14	-1.0803
0.15	-1.0364
0.16	-0.9945
0.17	-0.9542
0.18	-0.9154
0.19	-0.8779
0.20	-0.8416
0.21	-0.8064
0.22	-0.7722
0.23	-0.7388
0.24	-0.7063
0.25	-0.6745
0.26	-0.6433
0.27	-0.6128
0.28	-0.5828
0.29	-0.5534
0.30	-0.5244
0.31	-0.4959
0.32	-0.4677
0.33	-0.4399
0.34	-0.4125
0.35	-0.3853
0.36	-0.3585
0.37	-0.3319
0.38	-0.3055
0.39	-0.2793
0.40	-0.2533
0.41	-0.2275
0.42	-0.2019
0.43	-0.1764
0.44	-0.151
0.45	-0.1257
0.46	-0.1004
0.47	-0.0753
0.48	-0.0502
0.49	-0.0251
0.50	0
0.51	0.0251
0.52	0.0502
0.53	0.0753
0.54	0.1004
0.55	0.1257
0.56	0.151
0.57	0.1764
0.58	0.2019
0.59	0.2275
0.60	0.2533
0.61	0.2793
0.62	0.3055
0.63	0.3319
0.64	0.3585
0.65	0.3853
0.66	0.4125
0.67	0.4399
0.68	0.4677
0.69	0.4959
0.70	0.5244
0.71	0.5534
0.72	0.5828
0.73	0.6128
0.74	0.6433
0.75	0.6745
0.76	0.7063
0.77	0.7388
0.78	0.7722
0.79	0.8064
0.80	0.8416
0.81	0.8779
0.82	0.9154
0.83	0.9542
0.84	0.9945
0.85	1.0364
0.86	1.0803
0.87	1.1264
0.88	1.175
0.89	1.2265
0.90	1.2816
0.91	1.3408
0.92	1.4051
0.93	1.4758
0.94	1.5548
0.95	1.6449
0.96	1.7507
0.97	1.8808
0.975	1.96
0.025	-1.96
0.98	2.0537
0.99	2.3263
0.005	-2.5758
0.995	2.5758