Calculator
Emergency Fund Calculator
Your emergency fund target is essential monthly expenses × months of coverage — 3 to 6 months is the standard range. At the defaults, $3,000 of essentials and 6 months of coverage set an $18,000 target, and saving $300 a month at 4% APY reaches it in about 4 years 7 months.
The receipt also shows how many months of coverage what you've already saved buys you today.
This receipt disappears when you close the tab. FWF Ledger, our companion app, keeps the plan alive: your cushion fills toward the goal, month by month. This calculator stays free either way.
How much should your emergency fund be?
Your target is simply essential monthly expenses × months of coverage — the standard guidance is 3–6 months, and the right number inside that range depends on how replaceable your income is, not on your ambition. The emergency fund exists to convert a crisis into an inconvenience: job loss, a transmission, a root canal.
The time-to-goal projection compounds your monthly saving at the APY you enter (monthly compounding), because where this money lives matters: it should sit in a high-yield savings account — liquid, boring, and FDIC-insured — not in stocks, and not in a checking account earning nothing.
If you track your spending in our budget planner, the button above can pull your "Needs" total straight in as a starting point for essentials.
Common questions
Expenses or income? Expenses. You're insuring your life's running costs, not your salary — most people's essential spending is well below their income, which makes the target meaningfully smaller.
Should I pause investing to build it? A starter fund ($1,000–2,000) first, then split between the fund and other goals. Never let a high-interest debt payoff stall entirely — 24% card interest outruns any savings account.
Can it be too big? Yes. Every dollar past your target is a dollar earning savings-account rates instead of working harder elsewhere — see the savings growth calculator for what long-term money can do instead.
More depth in our emergency fund article. General information, not personalized financial advice. Found an error? Tell us and we'll fix it.