What Is This Calculator?
The How Long Will My Money Last Calculator estimates your financial "runway" — how many months your current savings will cover your living expenses if you stop adding new income. It's useful when planning a career break, sabbatical, early retirement, job loss buffer, or simply understanding how long an emergency fund could keep you afloat.
How to Use It
Enter your Current Savings (the total amount of money you have available to spend) and your Monthly Spending (your typical total expenses each month). The calculator divides one by the other to show how many months — broken down into years and months — your money will last.
The Formula Explained
The math is straightforward division:
$$\text{Months} = \frac{\text{Current Savings (\$)}}{\text{Monthly Spending (\$)}}$$
This simple model assumes your spending stays constant and ignores investment growth, interest, inflation, and any future income. For a quick reality check it's powerful, but for long-horizon planning you may want to add expected returns and inflation adjustments.
Worked Example
Suppose you have $50,000 in savings and spend $2,500 per month. Then $$\text{Months} = 50{,}000 \div 2{,}500 = 20 \text{ months},$$ which is exactly 1 year and 8 months. So your money would last roughly 20 months at that spending rate.
FAQ
Does this account for interest or investment growth? No. This is a simple division to give a conservative baseline. Real returns would extend the runway, while inflation would shorten it.
What spending number should I use? Use your total average monthly outflow, including rent/mortgage, food, utilities, insurance, transport, and discretionary spending.
How can I make my money last longer? Reduce monthly spending, increase savings, or add a source of income. Even small spending cuts can add several months to your runway.
