20 FOCUSED TOOLS
Savings & interest calculators
Model savings balances, contributions and growth timelines.
Choose the right calculation
Match the quoted rate to its compounding convention. A nominal rate, effective annual rate and continuous rate are not interchangeable. Contribution timing also matters when interest is included in a future-value model.
Find a tool for your question
Simple Interest Calculator
Estimate interest when it is calculated only on the original principal.
Compound Interest Calculator
Estimate a future balance with a fixed rate and regular compounding.
Savings Contribution Calculator
Find the monthly contribution needed to reach a savings target without interest.
Future Value of Monthly Deposits Calculator
Estimate the future value of equal end-of-month deposits.
Effective Annual Rate Calculator
Convert a nominal annual rate into an effective rate after compounding.
Savings Rate Calculator
Calculate what share of take-home income you save.
Rule of 72 Calculator
Approximate how long a sum takes to double at a constant annual return.
Savings Goal Time Calculator
Find how many whole months of fixed contributions reach a savings goal without interest.
Savings Interest Earned Calculator
Separate interest earned from the principal in a fixed-rate annual-compounding model.
Continuous Compounding Calculator
Estimate a balance when nominal interest compounds continuously.
Annuity Due Future Value Calculator
Estimate future value of equal beginning-of-month deposits.
Annuity Present Value Calculator
Discount a finite stream of equal end-of-period payments.
Annuity Payout Calculator
Find an equal monthly withdrawal that exhausts a balance over a chosen term.
Deferred Annuity Present Value Calculator
Discount equal future payments that begin after an additional waiting period.
Perpetuity Present Value Calculator
Value an ideal perpetual stream of equal payments.
Growing Perpetuity Calculator
Value an ideal infinite payment stream growing at a constant rate.
Retirement Fund Target Calculator
Translate a chosen annual retirement-income goal into a fund target under an assumed withdrawal percentage.
Retirement Savings Gap Calculator
Estimate the unfunded part of a future retirement target under a chosen growth assumption.
Inflation Adjusted Purchasing Power Calculator
Express a future nominal balance in today’s approximate purchasing-power terms.
Savings Drawdown Balance Calculator
Estimate a balance after equal withdrawals under a constant-return assumption.
Is a future savings value a forecast?
It is a scenario based on your entered rate and contributions. Changing rates, fees, tax or interrupted payments can change the actual outcome.
Useful next steps in other categories
Salary to Hourly Calculator
Convert gross annual salary to an hourly equivalent.
Rent Split by Income Calculator
Allocate one person’s share of rent in proportion to two incomes.
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