What this tool does
ROI Calculator computes return on investment from gain, cost, profit, and percentage return.
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📈 ROI Calculator
Calculate return on investment, profit/loss, cost basis, and break-even proceeds.
ROI checks
Validates investment, proceeds, costs, and non-zero cost basis. Simple ROI does not annualize or adjust for risk.
Formula provenance
Version 2026-07-12 · implementation-derived from calculateRoi
Formulas
costBasis = investment + costsprofit = proceeds - costBasisroiPercent = (profit / costBasis) × 100Variables and units
investmentUSDcostsUSDproceedsUSDcostBasisUSDprofitUSDroiPercentpercent
Assumptions
- Costs are added to the initial investment to form total cost basis.
- A non-zero positive cost basis is required.
Excluded
- Time horizon and annualization
- Volatility and investment risk
- Taxes and opportunity cost
- Inflation and cash-flow timing
Calculation: IEEE-754 JavaScript numbers; no intermediate display rounding
Display: Currency and percentages are generally shown to 2 decimal places
This describes the current deterministic implementation. It is not regulatory authority, a quote, or financial, tax, investment, medical, or legal advice.
Scenario comparison
Compare 2 to 5 scenarios with the same deterministic formulas used by this calculator. Edit the JSON assumptions, then export a bounded CSV. No tax-law modeling or financial advice.
Values use USD and display rounding to two decimals. Compare assumptions, not just the largest result.
Sensitivity table
Vary one or two numeric inputs across at most 7 values per axis and 49 cells. Calculations reuse the unchanged formula core.
Planning table only. Results use USD display assumptions, do not model tax law, and are not financial advice.
Why it is useful
It helps compare projects, campaigns, purchases, investments, and business cases with clear assumptions.
How it works
The browser applies ROI formulas using invested cost and proceeds or final value.
Best input
Use total cost, including fees and operating expenses, when comparing real options.
Planning tip
Pair ROI with time horizon and risk.
Privacy note
ROI math runs locally in your browser.
Important limitation
ROI is simplified and does not account for timing, volatility, taxes, opportunity cost, or risk.
Quick answers
Is ROI annualized?
No. Standard ROI ignores time unless annualized separately.
Can ROI be negative?
Yes when the result is a loss relative to cost.
Common Use Cases
Compare investment outcomes
Calculate simple ROI after fees or extra costs.
Evaluate marketing spend
Compare campaign cost to resulting revenue.
Finance Calculator Suite workflow
Move between loan, mortgage, tax, household utility, compound growth, retirement, ROI, margin, sales-tax, and discount calculations while keeping assumptions and financial limitations visible per tab.