Resource Center › Life & College Prep
🎓 Life & College Prep Grades 7–12
Financial Literacy Calculators
Money skills you'll use for life. Build a budget, see how saving early grows with compound interest, and find out what a loan really costs.
Learn How it works
- 50/30/20 rule: 50% of take-home pay for needs (housing, food, transportation), 30% for wants, 20% for savings and paying down debt.
- Compound interest: you earn interest on your interest. A = P(1 + r/n)nt. Starting early matters more than starting big.
- Loans: the interest rate and the length of the loan decide how much extra you pay. A longer loan has a smaller payment but costs more in total.
Try it Calculators
Practice Check yourself
Answer, then tap Check. You get an explanation either way.
Twenty extra years of compounding usually more than doubles the result.