Foster Wealth Calculators
Start with the free calculators below. Upgrade any time to unlock Savings Growth, Debt Payoff, Employee Cost Pro, and Expense Split Deluxe in FWV Plus & Pro.
"The plans of the diligent lead surely to abundance, but everyone who is hasty comes only to poverty."
Free Money Calculators
These calculators are completely free to use - no sign-up required. Use them to stress-test big decisions, check affordability, and plan your next move before you spend a dollar.
ROI Calculator
Inputs
Results
Final Amount
$15,000.00
Net Profit
$5,000.00
Total ROI
50%
Annualized ROI
22.47%
Want to hit a specific ROI?
How this works
Basic ROI
ROI measures how much you earned relative to the capital that was working on average.
- Net profit = final value − initial investment − mid-period contribution
- Average invested capital = initial investment + (mid-period contribution ÷ 2)
- ROI = net profit ÷ average invested capital
Annualized ROI
We convert your time input into years so a 6-month project and a 3-year project line up fairly.
- Annualized ROI = (1 + ROI)1 ÷ years − 1
Mid-period cash-flow
Use a positive number for extra capital added halfway through the period. Withdrawals aren’t supported because they can produce misleading percentages.
Target ROI
“Want to hit a specific ROI?” runs the same ROI formula in reverse—keeping your initial investment and midpoint contribution—to solve for the final value you’d need.
Learn more: ROI vs Annualized ROI—How to Read Them & Boost Your Investment Strategy
Your Money Tools Hub for Everyday Life & Business
FWV Calculators is designed for real decisions: homebuyers checking monthly payments, freelancers setting rates, small business owners tracking profitability, and households trying not to blow the shopping budget. Each calculator focuses on a single money question, with clear inputs and instant results.
When you're ready for deeper planning, FWV Plus and Pro unlock premium tools like Savings Growth, Debt Payoff, Employee Cost Pro, and Expense Split Deluxe so you can see the long-term impact of your choices - not just today's numbers.
Everyday Money
Plan purchases, protect your budget, and avoid surprises.
Business & Side Hustles
See the numbers behind your offers, projects, and hiring decisions.
Savings, Debt & Shared Costs
Plan ahead, pay off faster, and split fairly.
Foster Wealth Calculators FAQ
Are all calculators on this page free?
The calculators you see in the grid above are free to use here on the homepage. FWV Plus and Pro unlock additional premium tools, which you can preview from their landing pages or on the dashboard.
Do I need to create an account to use these calculators?
No account is required for the free tools - just open a calculator, enter your numbers, and see your results. To use Plus or Pro calculators, you'll create an FWV account and choose a plan on the Pricing page.
How do FWV Plus and FWV Pro work with these calculators?
FWV Plus and Pro expand what you can do with your numbers. Plus adds deeper savings and debt tools, while Pro unlocks advanced business calculators like Employee Cost Pro and Expense Split Deluxe. You can always start free and upgrade later.
Ready to go beyond the basics and unlock the full FWV calculator suite?
Explore FWV Plus & Pro Plans