Savings Calculator
Calculate compound savings growth, find your monthly savings target, or size your emergency fund.
Compound interest · Goal planner · Emergency fund · Rule of 72
Savings Calculator
Compound Growth
Goal Calculator
Emergency Fund
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HYSA: ~4–5%. CD: 4–5.5%. S&P 500 avg: ~10%
FAQ
Savings calculator questions
How does compound interest grow savings?
You earn interest on your interest. $10,000 at 5% compounded monthly grows to $16,470 in 10 years — the extra $470 vs annual compounding is from monthly compounding. After 30 years it reaches $44,677. Starting early and compounding frequently maximizes growth.
What is the Rule of 72?
72 ÷ Annual Rate = Years to Double. At 4%: 18 years. At 7%: 10.3 years. At 10%: 7.2 years. Quick mental math shortcut for estimating compound growth.
How much should I have in an emergency fund?
3–6 months of essential monthly expenses is the standard. Freelancers and self-employed people should target 9–12 months. Only count true necessities: housing, utilities, groceries, insurance, minimum debt payments — not discretionary spending.
Where should I keep my emergency fund?
High-yield savings account (HYSA) — currently 4–5% APY — is the best option. It's FDIC-insured, liquid, and earns meaningful interest. Money market accounts are similar. Avoid: investing in stocks (too volatile for emergency funds), regular savings (too low rate), or CDs (early withdrawal penalties).