Marlecourt
Savings

Emergency Fund Calculator

Translate your monthly essential expenses and chosen months of coverage into an emergency fund target, then see current coverage, shortfall or surplus, and estimated months to reach the target at your contribution rate. This calculator does not recommend a universal number of months. You choose the coverage period.

months

Your chosen coverage period (1–36 whole months) — not a universal recommendation.

Interest is not modeled — this calculator has no APY input.

Your results will appear here

Enter your assumptions and calculate to see the estimated result and supporting details.

How this calculator works

Enter monthly essential expenses, desired months of coverage (1–36), current emergency savings, and monthly contribution.

Target = expenses × months. Time to target uses simple division of shortfall by contribution. Interest is not modeled because there is no APY input.

Formula / methodology

target = monthlyEssentialExpenses × desiredCoverageMonths
currentCoverage = currentSavings / monthlyEssentialExpenses
shortfall = max(target − currentSavings, 0)
monthsToTarget = ceil(shortfall / monthlyContribution)
  • Whole months of coverage are used (1–36).
  • A $0 contribution while short of target returns an explicit limitation instead of looping.
  • Interest / yield is not modeled in this calculator.

Worked example

$4,000 monthly essential expenses, 6 months desired coverage, $10,000 current savings, $1,000 monthly contribution.

Target = $24,000. Current coverage = 2.5 months. Shortfall = $14,000. Months to target = 14.

Important assumptions

  • Desired months of coverage is your planning choice — not a universal recommendation.
  • No interest is applied to emergency savings in this model.
  • Results are educational estimates for the coverage target you select.

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