Emergency Fund Calculator
Last updated: November 4, 2026
Estimate an emergency savings target from essential monthly expenses and desired months of coverage.
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Quick summary: Set your own reserve target from essential monthly expenses and estimate the remaining gap and whole months of additions.
Read the complete guide
Updated reference sections in this guide are in English.
Choose the scope of the reserve
Enter the essential monthly expenses the reserve is intended to cover and select your own target number of months. Enter the savings already assigned to that purpose and a monthly amount you plan to add. The six-month default is an example input, not an assessment of what your household needs. Keep spending and savings figures in the same currency.
Target, gap and deposit count
Savings gap = maximum(target − current savings, 0)
Current coverage = current savings ÷ essential monthly expenses
Months of additions = ceiling(gap ÷ monthly addition)
The last expression applies when additions are positive. The month count is rounded up because a partial monthly contribution is not scheduled by this model. If the target is already covered, the gap and months needed are zero. If a gap remains but additions are zero, the target is not reached under the entered plan.
A target and a funding plan
2,500 monthly expenses and a six-month target
The selected target is 2,500 × 6 = 15,000. Existing savings of 4,000 leave a gap of 11,000. Adding 500 at each month end closes that gap in 22 months, assuming nothing is withdrawn.
When the last deposit is smaller than the regular amount
A gap of 1,100 with monthly additions of 300 takes 4 scheduled months: three additions leave 200 still needed. The calculator reports the first whole month that reaches or exceeds the target.
Check this scenario in the calculator:
- Essential monthly expenses
- 2500
- Your target months of expenses
- 6
- Current emergency savings
- 4000
- Amount added at each month end
- 500
- Currency (display only)
- USD — US dollar
A target amount is not a guarantee of protection
The tool does not predict the size or timing of an emergency. It assumes unchanged expenses and additions and excludes interest, inflation, withdrawals, account restrictions and changing income. Current coverage is a comparison with the entered monthly expense figure, not a promise that cash is immediately available or that every future expense will fit that estimate. Updating the expense estimate can change both the target and the reported coverage.
Reference and questions
CFPB: an essential guide to building an emergency fund discusses reserves for unexpected costs and the personal nature of a savings target. This calculator evaluates only the target and additions you enter.
Does the calculator choose a recommended target for me?
No. The months field is your assumption. The result does not assess your job, dependents, insurance or other circumstances.
What if I already have more than the selected target?
The remaining gap is zero and the amount above the selected target is shown separately.
Why must essential monthly expenses be positive?
Current expense coverage divides savings by those expenses. A zero denominator would not define a meaningful coverage count.