Pick your mountain
All 104 calculators →Savings goals
17 tools →FIRE & retirement
16 tools →Debt payoff
12 tools →Income & time
12 tools →Spending & habits
12 tools →Around the world
12 tools →Guides with the numbers worked out
All guides →What $100 in 2000 Is Worth Today
What $100 from 2000 and other years buys in 2026 dollars, using official US CPI data, plus what drove prices up and how to protect your savings.
The 4% Rule Explained With Real Numbers
Where the 4% rule came from, how it works year by year, what it assumes, and when a lower or higher withdrawal rate makes sense.
$50,000 a Year Is How Much an Hour?
$50,000 a year works out to about $24.04 an hour before tax. Here is the breakdown by month, week and day, plus take-home pay and a quick conversion table.
The 52-Week Money Challenge: What You End Up With
How the 52-week savings challenge works, the $1,378 you finish with, the reverse and doubled versions, and tips to actually finish it.
Cheapest Countries to Retire on $2,000 a Month
Which countries a $2,000 monthly retirement income covers in 2026, including health insurance, and what a comfortable life costs in each.
Coast FIRE: What It Is and How to Work Out Your Number
Coast FIRE means saving enough early that growth alone carries you to retirement. Here is how to calculate your number, with examples by age.
What Money Years does
Most money calculators stop at a single number. Ours try to answer the question you actually typed into Google: how long will this take, how much do I need each month, and what happens if I change one thing. Every tool shows the answer as a plain sentence, then the numbers behind it, then a short guide that explains the math and the assumptions in everyday language.
The calculators run entirely in your browser, so the figures you type never leave your device. They work in any currency, because the math of saving, interest and debt is the same in dollars, pounds or euros. Where a tool depends on one country's rules, such as US retirement accounts, we say so on the page.