Emergency Fund Calculator

See how many months of expenses your savings covers and how much more you need to reach a 3–6 month emergency-fund target.

Result

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How to use this calculator

Enter your essential monthly expenses (not your full spending).
Enter your current liquid savings.
Set your target months of runway (3–6 is typical).
Read your current runway and the amount still needed to hit the target.

About this calculator

An emergency fund is liquid savings set aside to cover essential expenses if your income stops or an unexpected cost hits. The standard guideline is three to six months of essential expenses — enough to weather a job loss or major repair without going into debt. This calculator divides your current savings by your monthly essential expenses to show how many months of runway you have, compares it to your target, and tells you the dollar gap remaining. It also shows the 3-to-6-month band in dollars so you can see where you fall. Use essential expenses — rent or mortgage, food, utilities, insurance, and minimum debt payments — rather than your full discretionary budget, since in a true emergency you would cut non-essentials. People with variable income, a single earner, or dependents often aim for the higher end or beyond.

How it works — the formula

Runway (months) = Savings ÷ Monthly essential expenses
Target = Target months × Monthly expenses
Gap = max(0, Target − Savings)

Savings divided by burn rate gives runway; the target scales expenses by the chosen number of months.

Source: CFPB — Building an Emergency Fund

Worked examples

Example 1

$4,000 expenses, $20,000 saved, 6-mo target

Inputs:: expenses=4000, savings=20000, targetMonths=6
Output:: 5 months runway, $4,000 to target

Example 2

$3,000 expenses, $18,000, 6-mo

Inputs:: expenses=3000, savings=18000, targetMonths=6
Output:: 6 months — fully funded

Example 3

$5,000 expenses, $5,000, 3-mo

Inputs:: expenses=5000, savings=5000, targetMonths=3
Output:: 1 month — under-funded

Limitations

A guideline; ideal size depends on income stability and dependents.
Uses current expenses; emergencies may change the burn rate.
Does not account for unemployment benefits or other backstops.

General guidance, not personalized financial advice.

Frequently asked

How much should I have in an emergency fund?+

The common guideline is three to six months of essential expenses. Three months may suffice for a dual-income household with stable jobs; six months or more is wiser for single earners, variable income, or those supporting dependents.

How do I calculate months of runway?+

Divide your liquid savings by your essential monthly expenses. If you have $20,000 and spend $4,000 a month on essentials, that is five months of runway.

Should I use total or essential expenses?+

Use essential expenses — housing, food, utilities, insurance, minimum debt payments. In an emergency you would cut discretionary spending, so budgeting the fund to essentials gives a realistic, achievable target.

Where should I keep an emergency fund?+

In a safe, liquid, accessible place — a high-yield savings account or money-market account — not in stocks or anything you might have to sell at a loss. The priority is availability and stability, not maximum return.

Should I build an emergency fund before paying off debt?+

A common approach is to build a small starter fund (e.g. $1,000 or one month) first, then aggressively pay high-interest debt, then complete the full 3–6 month fund. The right balance depends on your debt’s interest rate and job stability.

What counts as an emergency?+

Genuine, unexpected necessities: job loss, urgent medical or dental costs, essential home or car repairs. Planned or discretionary spending (vacations, upgrades) should come from a separate savings goal, not the emergency fund.