Grow your investments withclarity.
VestFoundry turns investment math into clear answers. Project compound growth, measure real returns, account for inflation, and plan toward your goals — then learn the why behind every number.
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Start with a calculator
Free, instant, and private — your numbers never leave your browser.
- Popular
Compound Interest Calculator
See how reinvested returns snowball a starting balance and regular contributions into long-term wealth.
Open calculator Investment Return Calculator
Project the future value of a lump sum or recurring investment at a given rate of return.
Open calculator- Popular
ROI Calculator
Measure return on investment as a simple percentage of what you put in.
Open calculator CAGR Calculator
Calculate the smoothed compound annual growth rate between two dates.
Open calculatorInflation Calculator
See how rising prices erode purchasing power and your real investment returns over time.
Open calculatorSavings Goal Calculator
Work out how much to invest each month to reach a target by a set date.
Open calculator
How VestFoundry works
From numbers to understanding in three steps
- 01
Enter your numbers
Plug in an amount, a rate, and a time frame. No sign-up, no spreadsheets.
- 02
See your results
Get an instant, clear breakdown of growth, returns, or real value over time.
- 03
Understand the why
Each tool links to a plain-English guide, so the math actually makes sense.
Browse by goal
Find the right tool for the moment
Whether you're investing your first dollar or working toward a long-term goal, start where your goal lives.
Investment Growth
See how contributions and reinvested returns compound your investments over time.
ExploreInvestment Performance
Measure and compare returns with the metrics investors actually use.
ExploreMoney Over Time
Understand what money today is worth tomorrow — and how inflation changes it.
ExplorePlanning & Goals
Turn a target into a plan and estimate how quickly your money can get there.
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Learn
Understand the why, not just the what
Short, jargon-free guides that turn financial concepts into decisions you can act on.
Returns & Performance
CAGR vs. Average Return: Why They Differ
Learn the difference between CAGR and average return, how each is calculated, when to use them, and why CAGR can better describe long-term investment growth.
6 min read
Investing Basics
Compound Interest, Explained Simply
Learn how compound interest works, see the formula and examples, and understand how time, contributions, fees, and inflation affect long-term growth.
7 min read
Money Over Time
Present Value, Future Value & the Time Value of Money
Why a dollar today is worth more than a dollar tomorrow, and how to move money across time.
7 min read
Returns & Performance
What Counts as a Good ROI?
Learn what makes an ROI good, why time and risk matter, and how benchmarks, inflation, fees, and CAGR change the way you should evaluate investment returns.
5 min read
Why VestFoundry
Investment tools that respect your time and trust
We built the calculator experience we wished existed: fast, private, and paired with education.
Private by default
Your numbers are calculated right in your browser and aren't tied to an account, so your inputs stay with you.
Free to use
Every calculator and guide is free — no subscription or account required to get an answer.
Learn as you go
Each calculator links to a plain-English guide, so you understand the result — not just see it.
Built for clarity
Clean, distraction-free tools designed to give you a confident answer in seconds.
Frequently asked questions
Frequently Asked Questions
Everything you need to know about VestFoundry and our investment calculators.
Are VestFoundry's investment calculators free?
Yes. All VestFoundry calculators are free to use with no account or subscription required.
What investment calculators does VestFoundry offer?
VestFoundry offers calculators for compound interest, investment returns, ROI, CAGR, inflation, savings goals, and other investment and financial-planning calculations.
How accurate are VestFoundry's investment calculators?
VestFoundry calculators use established financial formulas and clearly show the assumptions used in each calculation. Results depend on the information and assumptions you enter.
Can I use VestFoundry calculators for financial planning?
Yes. You can use them to explore investment growth, potential returns, inflation, savings goals, and other financial scenarios. The calculators are designed for educational and planning purposes.
Do VestFoundry calculators store the numbers I enter?
Calculator inputs are processed in your browser and are not tied to an account. Your numbers stay with you rather than being stored as part of a user profile.
How does VestFoundry calculate investment results?
Each calculator uses the appropriate financial formula for the calculation and explains the inputs, assumptions, and methodology so you can understand how the result is produced.
Your clearest investment decision is one calculation away.
Explore the calculators and guides — free to use, no account required.