Finance guides
Read DigiCalc's finance guides and explore related calculators.
How to Calculate CAGR: Compound Annual Growth Rate
Calculate CAGR with worked examples, distinguish effective annual growth from monthly compounding, and understand the limits of endpoint returns.
FinanceShould I Pay Off Debt or Invest? How to Decide
Should you pay off debt first or start investing? Compare interest rates vs expected returns with real examples and break-even math to make the right call.
FinanceHow Much Should I Have Saved for Retirement by Age?
Retirement savings benchmarks by age 30, 40, 50, and 60: how much experts recommend, how to calculate your target, and how to catch up if you're behind.
Finance15-Year vs 30-Year Mortgage: Which Is Better?
Compare 15- and 30-year mortgage payments, interest and five-year balances using one fixed-rate example, with clear cash-flow and fee limitations.
FinanceWhat Is Dollar-Cost Averaging? How DCA Works (With Examples)
Dollar-cost averaging invests fixed amounts on a regular schedule regardless of price. See real DCA examples, lump-sum comparison, and when each strategy wins.
FinanceAPR vs APY: What's the Difference? (With Examples)
APR and APY are not the same thing. Learn how each is calculated, which one tells you what you'll earn or owe, and how to compare them correctly.
FinanceDebt Snowball vs Avalanche: Repayment Order and Trade-Offs
Compare smallest-balance and highest-rate repayment order with an explicit example, clear trade-offs and the limits of single-debt payoff calculators.
FinanceHow to Calculate Your Monthly Mortgage Payment
Calculate fixed-rate mortgage principal and interest with a precise worked example, then add explicitly assumed taxes, insurance and other costs.
FinanceHow Long Does It Take to Pay Off Student Loans?
Compare tested fixed-payment student-loan examples and understand why daily interest, current federal plans and forgiveness require separate calculations.