对数计算器

计算任意底数的对数

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log10(100)

2

Common Logarithms of 100

Natural log (ln):4.60517Log base 10:2Log base 2:6.643856Log base e:4.60517

Antilogarithm (Inverse)

102

100

Change of Base Formula

log10(100) = ln(100) / ln(10)

= 4.60517 / 2.302585 = 2

Logarithm Properties

logb(xy) = logb(x) + logb(y)

logb(x/y) = logb(x) - logb(y)

logb(xn) = n × logb(x)

logb(1) = 0

logb(b) = 1

Logarithm Table (Base 10)
log(1):0.0000log(2):0.3010log(3):0.4771log(4):0.6021log(5):0.6990log(6):0.7782log(7):0.8451log(8):0.9031log(9):0.9542log(10):1.0000log(11):1.0414log(12):1.0792log(13):1.1139log(14):1.1461log(15):1.1761log(16):1.2041log(17):1.2304log(18):1.2553log(19):1.2788log(20):1.3010

Special Values

e (Euler's number):2.7182818285ln(e):1log₁₀(10):1log₂(2):1

About 对数计算器

计算任意底数的对数

Use this free online 数学工具 tool to work faster without installing extra software. The interface is built for quick input, clear output, and straightforward results on desktop and mobile devices.

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