Economics
Economics calculators
Macro and micro economics tools: inflation, GDP growth and per capita, purchasing power parity, price elasticity, market concentration and cost of living.
8 calculators
Free HHI Calculator: Market Concentration
Free Herfindahl-Hirschman Index calculator: shares or revenue → HHI, CR4/CR8, merger Δ, DOJ bands. CSV/PDF export, not h-index or household income.
- HHI calculator
- Herfindahl-Hirschman Index calculator
Price Elasticity Calculator (PED & XED)
Free price elasticity of demand calculator: PED midpoint (arc), cross-price XED, revenue test, elastic vs inelastic. Step-by-step + CSV/PDF export.
- Price elasticity calculator
- Price elasticity of demand
Comparative Advantage Calculator
Free comparative advantage calculator: output & input modes, opportunity costs, specialization, terms of trade. CSV/PDF export, not RCA export data.
- Comparative advantage calculator
- Opportunity cost
GDP Growth Rate Calculator
Free GDP growth rate calculator, how to calculate GDP and real GDP growth, solve mode, deflator lane, macro callouts, CSV/PDF export.
- GDP growth rate calculator
- How to calculate GDP growth rate
GDP Per Capita Calculator
Free GDP per capita calculator, how to calculate GDP per capita, GDP ÷ population with scales, solve mode, World Bank income group, CSV/PDF export.
- GDP per capita calculator
- How to calculate GDP per capita
Purchasing Power Parity Calculator
Free purchasing power parity calculator: PPP salary converter for 160+ countries. World Bank data, PPP vs exchange rate, international dollars, CSV/PDF export.
- PPP calculator
- Purchasing power parity calculator
Cost of Living Calculator
Free US cost of living calculator, compare metros with BEA Regional Price Parities, salary equivalency, category breakdown, CSV/PDF export.
- Cost of living calculator
- Cost of living comparison
Inflation Calculator
Free CPI inflation calculator with BLS CPI-U (1913–2026). Purchasing power, future & reverse inflation modes, chart, CSV/PDF export.
- Inflation calculator
- CPI calculator
Frequently asked questions about economics calculators
What does the inflation calculator show?
How the purchasing power of an amount changes between two dates, based on the rate you enter.
What is price elasticity of demand?
How strongly quantity demanded responds to a change in price. A value above 1 in absolute terms means demand is elastic.
What does the HHI measure?
Market concentration: the sum of squared market shares. Higher values mean fewer firms dominate.