Savings Calculator
Starting amount in your savings account
Amount saved each month
How long you plan to save
Target amount you want to save
Expected annual inflation rate
Ready to Calculate Your Savings Growth?
Enter your savings parameters on the left to see detailed projections, compound interest calculations, and goal analysis.
Savings Calculator
The Savings Calculator projects how deposits and interest can grow into an ending balance over time. You stop guessing whether $175 a month actually moves the needle. Read on and you'll also find out why APY and compounding frequency quietly reshape that total.
Here's what you'll walk away knowing:
- How to run the Savings Calculator with start balance, deposits, and years
- Why APY already includes compounding, while a nominal rate does not
- Illustrative interest on $10,000, $50,000, $100,000, and $1 million in one year
- Simple vs compound interest, doubling time, and living-off-interest realism
How to Use the Savings Calculator
Four inputs get you most of the way.
- 1
Enter your starting balance
Initial deposit is whatever sits in the account today. Zero is fine if you are starting from scratch.
- 2
Add regular deposits
Monthly deposit is the amount you plan to park each month. Leave it blank if you are not adding more.
- 3
Set the time horizon
Savings period in years is required. Longer horizons give compounding more room to work.
- 4
Optional goal and inflation
Savings goal shows whether you are on track. Inflation rate helps you see purchasing power, not just the raw balance.
Worked Example: Daniel grows $10,247
Let's run Daniel's numbers. He starts with $10,247 at an illustrative 4.65% APY, compounded monthly, for 2 years. He also adds $175 each month. After 24 deposits, total cash in is $14,447. With compounding, the ending balance lands near $15,612, so interest earned is roughly $1,165. And just like that, Daniel sees what the account can actually grow to.
Start
$10,247
APY (illustrative)
4.65%
Monthly add
$175
≈ End (2 yrs)
$15,612
This calculator is for estimates. Check your bank's current APY and compounding schedule before deciding.
What Compound Interest Actually Does to Savings
Picture Priya stacking coins in a jar. Each month the bank adds a little interest on the whole pile, not just the new coins. Next month, that tiny bump earns interest too. That snowball is compounding.
Simple interest only pays on the original principal. Compound interest pays on principal plus prior interest. See the difference? Over short stretches the gap looks small. Over decades it can get loud.
APY already folds compounding into one yearly figure. APR or a nominal rate does not. Banks love leading with whichever number looks friendlier on the flyer. You have to ask which one you are comparing. Sound familiar?
Frequency matters. Daily compounding usually edges monthly, which usually edges annual, when the quoted rate is the same nominal figure. If the quote is already an APY, the bank has done that math for you. Your results may vary slightly if fees, rate tiers, or minimum balances apply.
Say Daniel parks that same $10,247 with no extra deposits. At 4.65% APY for one year, interest is about $476, ending near $10,723. Now you know why the starting balance and the rate label both deserve a second look.
The Savings Growth Formula
For a single lump sum with compound interest:
FV = P × (1 + r/n)^(n×t)
- P = starting principal
- r = annual nominal rate (as a decimal)
- n = compounding periods per year. And t? That's years.
Now let's plug in a clean daily-compound FAQ case:
- $1,000 at 6% nominal, compounded daily, for 2 years.
- FV = 1000 × (1 + 0.06/365)^(365×2) ≈ $1,127.49.
- Interest earned ≈ $127.49. Pretty easy, isn't it?
Here's where it gets interesting: the same $1,000 at 10% simple interest for 2 years is just 1000 × (1 + 0.10×2) = $1,200. Simple math, different growth path. Compounding would push past that if the rate and time line up.
Of course, you can skip all this counting and let the Savings Calculator do it instantly.
Interest in One Year (Illustrative)
This table assumes a 4.65% APY for one year with no extra deposits. Use it to scan common starting balances. Real bank APYs change by country and date.
| Starting Balance | Est. Interest (1 yr) | Est. Ending Balance |
|---|---|---|
| $10,000 | $465 | $10,465 |
| $50,000 | $2,325 | $52,325 |
| $100,000 | $4,650 | $104,650 |
| $1,000,000 | $46,500 | $1,046,500 |
Daniel's $10,247 sits just above the $10,000 row, so one year of interest near $476 tracks that band. Totally worth running the numbers.
Real-World Applications
Maria parks an emergency fund in a high-yield savings account. She cares more about access and FDIC-style protection than beating the stock market this year.
Consider Kevin with $5,000 and a 20-year horizon. At a mid-single-digit APY with steady deposits, the future value can surprise him. Without deposits, growth is slower. Why does that matter here? Habit often beats rate shopping alone.
Want to double $1,000 at 5%? The Rule of 72 says roughly 72 ÷ 5 ≈ 14.4 years. Exact compound math is closer to 14.2 years. At 8%, the same rule points near 9 years.
And can you live off the interest of $100,000? At 4.65% that's about $4,650 a year before tax. For most budgets, that is a helper, not a paycheck. (yes, really...)
Common Mistake: Chasing Yesterday's "Best" Bank Rate
Here's where most people get confused about savings rates. They search "which bank gives 6%" or 7% or 8% and treat a screenshot like a permanent offer. Rates move. So do promo periods and balance caps.
Compare APY to APY. Mixing a 5% APY with a 5% nominal monthly rate is how you talk yourself into the wrong account. In most cases, a CD can post a higher locked rate than an everyday savings account, but you trade liquidity for that. This won't apply if your local rates are capped far below those headlines.
That's why we keep quotes illustrative and push you to check live APYs. For growth with more market risk, try the Investment Calculator. For longer plans, open the Retirement Calculator.
FAQs
How much interest does $10,000 earn in a year?
At our illustrative 4.65% APY with no extra deposits, about $465. Ending balance would be roughly $10,465. Your bank's live APY and compounding schedule can nudge that up or down.
How much is $1,000 worth after 2 years at 6% compounded daily?
Let's walk it. (1) Use FV = 1000 × (1 + 0.06/365)^(730). (2) That lands near $1,127.49. (3) Interest earned is about $127.49. If the 6% were already an APY, the path would differ slightly.
How long will it take $1,000 to double at 5% interest?
Roughly 14.2 years with annual compounding. The Rule of 72 shortcut is 72 ÷ 5 = 14.4 years, close enough for planning. At 8%, you're looking nearer to 9 years.
What is the difference between simple and compound interest in a savings account?
Simple interest pays only on the original principal. Compound interest pays on principal plus interest already credited. Most modern savings products use compounding, which is why APY exists.
Can I live off the interest of $100,000?
Usually not as your only income. At 4.65% that's about $4,650 a year before tax, or roughly $387 a month. It can help with bills, but for most people it won't cover full living costs.
Related calculators: Future Value Calculator · Present Value Calculator