Functioning Human™ tools

Emergency fund calculator

Find out how big your safety net should be. Pick a starting point below or enter your own numbers — we’ll show your target fund, how far along you already are, and a monthly savings line to close the gap.

Quick start — monthly essentials

Rent, food, utilities, transport, minimum debt payments.

Common targets

Whatever you’ve already set aside for emergencies.

Suggested timelines

Enter your monthly expenses and a buffer of at least one month to see your target fund.

Frequently asked questions

How much should I have in an emergency fund?

A common starting point is three months of essential expenses, with six months being a sturdier target if your income is variable or you support others. Multiply your essential monthly expenses by the number of months of buffer you want to find your target.

What counts as an essential expense?

Essential expenses are the costs you genuinely cannot skip: rent or mortgage, food, utilities, transportation, insurance, and minimum debt payments. Leave out things like dining out, subscriptions, and discretionary spending when sizing your emergency fund.

How long should it take to build an emergency fund?

There is no single right answer. Pick a timeframe that fits your budget, then divide your target fund by the number of months. This calculator shows that monthly savings line for you so you can see whether the pace is realistic.

Where should I keep my emergency fund?

Most people keep an emergency fund somewhere safe and easy to reach, like a high-yield savings account, separate from everyday spending so it is not tempting to dip into.