Logarithm Calculator

Calculate logarithms with any base

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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 Logarithm Calculator

Calculate logarithms with any base

Use this free online math tools 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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