Economics calculators
Free interactive calculators for the most common economics computations, across micro and macro. Each one shows the formula, a worked example, and a link to the full topic if you want to go deeper.
Microeconomics
Price Elasticity of Demand
Calculate price elasticity using the midpoint (arc) method or point method. Includes elasticity classification and revenue impact.
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Consumer & Producer Surplus
Compute consumer surplus, producer surplus, and total economic surplus at market equilibrium from linear demand and supply.
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Deadweight Loss
Calculate deadweight loss from price ceilings, price floors, taxes, or monopoly pricing. Shows the welfare triangle size and the surplus transferred.
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Macroeconomics
GDP
Compute GDP from the expenditure approach (C + I + G + NX) and convert nominal GDP to real GDP using the deflator.
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Inflation Rate & CPI
Find the inflation rate between two CPI readings and adjust a dollar amount from one year's prices to another's.
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Spending Multiplier
Turn the MPC into the spending, tax, and balanced-budget multipliers, and see how a change in spending ripples out to GDP.
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Money Multiplier
Use the reserve ratio to get the money multiplier and the maximum money a new deposit can create across the banking system.
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