Logarithm Calculator

Log of any base, natural ln, log10 and log2.

Input Parameters

Value (x)

Base

Logarithm · log₁₀(1000)3

ln(1000)6.907755279

log10(1000)3

175 available

Annuity and differentiated monthly installments, interest breakdown, and amortization schedule.

Calculate PITI (Principal, Interest, Taxes, Insurance), PMI, and accelerated payoff savings.

Visualize compound growth with recurring deposits, annual rate, and investment horizons.

Add or extract Value Added Tax (VAT) with international country presets.

Analyze profitability and percentage return on business capital and investments.

Gross to net salary with income tax, social contributions and deductions, monthly and annual.

Logarithm of any valid base plus one-click ln, log10 and log2 with reference values.

Change of base?

log_b(x) = ln(x) / ln(b) — how every base is computed here.

Domain limits?

Value must be positive; base must be positive and not 1.

ln vs log10?

ln uses e ≈ 2.718 for math and growth; log10 fits orders of magnitude and decibels.