Looking for a retirement savings calculator by age? This free tool gives you your savings at retirement age and how long the money lasts. Just enter your numbers and press Calculate — results are instant.
Retirement planning has two phases. Before retirement, your savings grow: the starting amount and every monthly contribution compound at the return rate until your retirement age. After retirement, the direction flips: the fund still earns a return, but you take out your monthly spending, so the balance shrinks. The calculator works out both phases — how much you will have at retirement, and how many years that fund lasts at your spending level.
Example: Age 30 · Retire at 65 · Current savings $50,000 · Monthly contribution $600 · Return 7% · Spend $4,000/month in retirement · Return after retirement 4%
Savings at Retirement (age 65): $1,655,940.35
A common rule of thumb is about 25 times your yearly spending — the idea behind the 4% rule, which says withdrawing 4% of the fund a year should last a long time. It is a rough guide, not a guarantee; try different spending levels here to see the effect.
You still have three levers: save more each month, retire a little later, or plan to spend a little less. Even a few extra working years help twice — more saving years and fewer spending years.
No, it works in nominal dollars. If you expect 3% inflation, a $4,000 monthly spend in today's money will cost much more in 35 years, so treat the spending figure as an estimate and revisit it over time.
Use a cautious assumption. Many planners model 6 to 7% a year for a stock-heavy portfolio before retirement and 3 to 4% after, when the money is usually invested more safely. Try the low end to see the cautious outcome.