Scenario 1
Emergency fund build
$0 start + $500/month at 4.5% for 1 year → $6,140. Interest adds $140 in the first year.
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Savings Calculator
Find out exactly how long it takes to reach your savings goal.
Adjust your inputs
Results update instantly as you type or drag.
0 – 1,000,000
$
0 – 50,000
$
0 – 20
%
1 – 50
Quick insights
Total deposited
$23,000
Interest earned
$3,403
Quick answer
How do you calculate savings growth?
Your savings grow through compound interest on your balance plus regular contributions. Final = Balance×(1+r)^n + Deposit×((1+r)^n − 1)/r.
How it works
From inputs to result in four steps
A quick walkthrough of what this calculator does behind the scenes.
- 1
Enter your current savings balance.
- 2
Set your monthly deposit amount.
- 3
Enter your account's annual interest rate.
- 4
Set the time period to see your projected balance.
Formula
The math behind the number
No black box — here's exactly how the result is computed.
Formula
r = monthly rate = Annual rate ÷ 12 ÷ 100
n = months
P = starting balance, D = monthly deposit
Final = P×(1+r)^n + D×((1+r)^n − 1)/rExamples
Real-world scenarios
See how the numbers play out for typical use cases.
Scenario 2
Long-term savings
$5,000 + $300/month at 4.5% for 10 years → $51,700. Contributions total $41,000 — interest adds $10,700.
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