Return on Investment (ROI) Calculator
This free ROI calculator helps investors, business owners, and marketing managers measure investment performance accurately. Calculate total ROI percentage, convert it to a comparable annualised rate, compare two investments side by side, and compute marketing Return on Ad Spend (ROAS) — all on one page with step-by-step formulas shown for every result.
How to Use the ROI Calculator
- Enter the Cost of Investment — the total amount you spent or plan to spend.
- Enter Net Profit — the profit made above and beyond the original cost (Total Return minus Cost).
- Optionally enter the Investment Duration in years to calculate annualised ROI.
- Read the ROI %, annualised ROI, and total return from the results panel. The formula box shows the full calculation.
- Use the Compare Two Investments section to determine which of two opportunities delivers better annualised returns.
- Use the Marketing ROAS section to evaluate ad spend efficiency — enter Ad Spend and Revenue Generated.
ROI Formulas
ROI % = (Net Profit ÷ Cost) × 100
Annualised ROI = ((1 + ROI/100)^(1/years) − 1) × 100
ROAS = Revenue ÷ Ad Spend
Key Features
- Basic ROI with live formula display — substitutes your actual numbers into the equation.
- Annualised ROI using the compound annual growth rate (CAGR) formula for accurate multi-year comparison.
- Side-by-side investment comparison with a "Better ROI" badge and annualised ROI difference.
- Marketing ROAS calculator: shows ROAS multiplier, ROI on ad spend, and net profit from the campaign.
- Colour-coded positive (green) and negative (red) ROI display for at-a-glance reading.
- Copy result to clipboard for pasting into reports or proposals.
Use Cases
Evaluate a Business Investment or Capital Project
Before committing capital to new equipment, a marketing campaign, or a business acquisition, calculate the expected ROI and annualised return. Compare against your organisation's hurdle rate (typically 15–25% for business investments) to decide whether to proceed.
Compare Two Investment Opportunities
A 30% ROI over 1 year and a 60% ROI over 3 years look different at first glance. The annualised comparison reveals the 30% 1-year return (30% annualised) outperforms the 3-year investment (16.9% annualised) on a per-year basis. This tool surfaces that difference instantly.
Measure Marketing Campaign Efficiency
Digital marketing teams use ROAS to benchmark paid search, social, and display ad campaigns. Enter total ad spend and attributed revenue to see whether a campaign meets the minimum ROAS threshold for profitability — and compare campaigns across channels or time periods.
Assess Real Estate or Stock Market Returns
Enter the purchase price as the cost and the net profit (sale price minus original cost, net of transaction fees) to compute total ROI. Add the holding period in years for an annualised return you can benchmark against the S&P 500 or comparable property indices.
FAQ's
ROI % = (Net Profit ÷ Cost of Investment) × 100. Net Profit = Total Return minus Cost. Example: invest $10,000 and receive $13,500 back. Net Profit = $3,500. ROI = (3,500 ÷ 10,000) × 100 = 35%.
Annualised ROI = ((1 + ROI/100)^(1/years) − 1) × 100. This converts a multi-year total ROI into an equivalent per-year rate using the CAGR (Compound Annual Growth Rate) formula. A 35% total ROI over 2 years annualises to roughly 16.2% per year.
It depends on investment type and duration. Stock market: historically 7–10% annually. Real estate: 8–12%. Business investments: often a minimum 15–25% hurdle rate. Marketing campaigns: typically 300–500% ROI (3–5× ROAS). Always compare to the relevant benchmark for your asset class and time horizon.
Total ROI ignores time. A 100% ROI over 10 years (7.2% annually) is significantly weaker than 100% over 2 years (41.4% annually). Annualised ROI puts both on the same timeline, making it the only fair basis for comparing investments held for different durations.
ROAS (Return on Ad Spend) = Revenue ÷ Ad Spend. A 4× ROAS means $4 in revenue for every $1 spent. ROI on ad spend = (Revenue − Spend) ÷ Spend × 100 = 300% at 4× ROAS. ROAS measures gross revenue efficiency; ROI on ad spend measures net profit efficiency after deducting the cost of the ads.
Most e-commerce businesses target a minimum 3–4× ROAS. The break-even ROAS = 1 ÷ gross margin %. A 40% gross margin product breaks even at 2.5× ROAS. High-margin products (80%+) may be profitable at 1.5×; low-margin products (15–20%) may need 5–7× to remain profitable after COGS.
Yes. A negative ROI means the investment lost money — net profit is negative. Investing $10,000 and recovering $8,000 gives a net profit of −$2,000 and ROI = −20%. Negative ROI is not always a failure: early-stage R&D, brand-building, and new market entry may accept negative ROI short-term in expectation of long-term gains.
ROI (Return on Investment) measures return relative to the total cost of an investment — applicable to any asset, project, or campaign. ROE (Return on Equity) is a corporate finance metric measuring net income relative to shareholder equity (assets minus liabilities). ROI is broadly applicable; ROE is used specifically in company financial analysis and stock screening.
Related Tools
ROI is the universal language of investment decisions — whether you are allocating a marketing budget, buying equipment, evaluating a real estate deal, or comparing two job offers for their long-term career value. For investments with regular contributions over time, the compound interest calculator complements this tool by projecting how your capital grows across different compounding periods. Toolaroid's free ROI calculator covers every scenario: total ROI, time-adjusted annualised ROI, side-by-side investment comparison, and marketing ROAS — all with transparent formulas so you can understand and verify every result. No account, no fee, no data collection.