Logarithm Table

Table of base 10, base 2 and base e (ln) logarithms:

x	log10 x	log2 x	loge x
0	undefined	undefined	undefined
0+	- ∞	- ∞	- ∞
0.0001	-4.000000	-13.287712	-9.210340
0.001	-3.000000	-9.965784	-6.907755
0.01	-2.000000	-6.643856	-4.605170
0.1	-1.000000	-3.321928	-2.302585
1	0.000000	0.000000	0.000000
2	0.301030	1.000000	0.693147
3	0.477121	1.584963	1.098612
4	0.602060	2.000000	1.386294
5	0.698970	2.321928	1.609438
6	0.778151	2.584963	1.791759
7	0.845098	2.807355	1.945910
8	0.903090	3.000000	2.079442
9	0.954243	3.169925	2.197225
10	1.000000	3.321928	2.302585
20	1.301030	4.321928	2.995732
30	1.477121	4.906891	3.401197
40	1.602060	5.321928	3.688879
50	1.698970	5.643856	3.912023
60	1.778151	5.906991	4.094345
70	1.845098	6.129283	4.248495
80	1.903090	6.321928	4.382027
90	1.954243	6.491853	4.499810
100	2.000000	6.643856	4.605170
200	2.301030	7.643856	5.298317
300	2.477121	8.228819	5.703782
400	2.602060	8.643856	5.991465
500	2.698970	8.965784	6.214608
600	2.778151	9.228819	6.396930
700	2.845098	9.451211	6.551080
800	2.903090	9.643856	6.684612
900	2.954243	9.813781	6.802395
1000	3.000000	9.965784	6.907755
10000	4.000000	13.287712	9.210340

 

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See also

• Logarithm
• Logarithm calculator
• Natural logarithm calculator
• Natural logarithm
• e constant
• Decibel (dB)