About this calculator
Slope, y-intercept, line equation, angle and distance from two points, including vertical lines.
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.
Slope, line equation, angle and distance from two points.
Slope, y-intercept, line equation, angle and distance from two points, including vertical lines.
m = (y₂ − y₁) / (x₂ − x₁): rise over run.
When x₁ = x₂ the slope is undefined; the line equation is simply x = x₁.
Arctangent of the slope in degrees, measured from the positive x-axis.