Economics Calculators

Economic ideas are easier to follow once the numbers move. Changing an input and watching GDP growth, elasticity or a market surplus respond makes the relationship concrete in a way a definition alone does not. This section gathers those working calculations in one place, from classroom concepts to the indicators reported in the news.

Every sector of an economy buys from the others, so meeting final demand takes more production than the demand itself: steel needs coal, coal needs…

The Harrod-Domar model reduces economic growth to two numbers: how much of its income an economy saves, and how much capital it needs to produce one unit of output.

Deflation is a fall in the general level of prices: the same basket of goods costs less at the end of the period than it did at the start.

Output went from 1,000 units to 1,200 units. Is that a big change or a small one?

Net operating surplus is the operating income left after everyone else has been paid: workers, suppliers, and the tax authority, with subsidies added back, and then the wear and tear on fixed assets taken out.

Price elasticity of supply (PES) answers a single question: when the price moves 1%, how many percent does the quantity supplied move?

You ran a business survey and now you have three piles of answers: positive, neutral, and negative.

Some unemployment exists even when an economy is running well, because people move between jobs and some skills fall out of demand.

How much of one good would you give up for a little more of another? The marginal rate of substitution (MRS) answers that.

The labor force participation rate is the share of the working-age population that is working or actively looking for work, and it is the first number economists check when a jobs report lands.