Try it yourself:
| @1 |
LN10
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| @2 |
log(10)
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LN10 is ln(10), approximately 2.302585. It converts between natural-logarithm and base-10 logarithm expressions.
Use log() for natural logarithms and log10() for base-10 values. LN10 appears in the identity ln(x) = LN10 × log10(x).
Logarithms of real values require positive arguments. Preserve the constant exactly until final numeric output with numeric().
Enter LN10 on a calculator line to see its built-in value, or place the name inside a longer expression. Keep any displayed unit attached when converting or combining physical quantities, and check that every other value uses a compatible dimension.
The example above is editable, so you can replace surrounding values and test the constant in your own formula. Browse all constants to compare related values and notation.