GDP — Gross Domestic Product — is the total value of everything a country produces in a year. Every car built, every coffee sold, every haircut given, every app downloaded. Add it all up and you get one number that supposedly tells you how well a country is doing. Governments use it to decide spending. Central banks use it to set interest rates. Investors use it to move trillions of dollars. If GDP is growing, everyone breathes easy. If it shrinks for two quarters in a row, it's officially called a recession — and people panic. One number. Enormous consequences. So it's worth asking: what exactly is it counting?

Here's how economists actually calculate it. There are three ways, and they all give the same answer (in theory). The most common: add up all spending in the economy. What consumers buy. What businesses invest. What the government spends. Plus exports, minus imports. That's it. GDP = Consumer spending + Business investment + Government spending + (Exports − Imports). Every dollar someone spends is a dollar someone else earned producing something. So you can also add up all incomes. Or add up the value added at each stage of production. Three different angles, same number. The economy as one giant accounting identity.

And here's where it gets genuinely weird. GDP misses enormous amounts of real value. You cook dinner at home — not counted. You help a friend move — not counted. You raise your kids — not counted. You volunteer, mentor someone, fix your own car — none of it shows up. But hire a chef, a moving company, a nanny, a mechanic? Suddenly it counts. GDP only sees what passes through markets. The moment money changes hands, it exists. The moment it doesn't, it's invisible. Which means some of the most important things people do — care work, community, creativity that isn't monetized — are statistically worthless to the metric that runs the world.

So why do we still use it? Because it works — for what it was designed to do. GDP reliably tracks economic activity. It tells you if the engine is running faster or slower. It's comparable across countries and across time. And in a crisis — a recession, a pandemic, a war — it's the fastest signal you have that something is going wrong or right. The problem isn't GDP. The problem is treating it like it's the whole story. Countries like New Zealand and Bhutan have started measuring 'wellbeing budgets' and 'gross national happiness' alongside GDP. The UN has the Human Development Index, which folds in education and life expectancy. None of them have replaced GDP. Because one number is convenient, and convenient wins. But the next time someone tells you the economy is growing, the right follow-up question is: growing for whom, and counting what?