Running a Businessinvesting
ROI Calculator
Worldwide — arithmetic, no local rules
Simple ROI from cost and final value, annualized when you give it a time period — because "we doubled our money" means something completely different over 2 years versus 12.
The numbers
- ROI
- +44%
- 22,000 gain
- Annualized (CAGR)
- 12.92% / yr
The operator’s read
Worth knowing
The annualized figure is the comparable one: 44% over 3 years is 12.9%/year — hold that against your alternatives (index funds ~7-10% nominal, paying down debt at its APR, risk-free rates).
Worth knowing
Count ALL the cost: fees, taxes, your own hours at a real rate. ROI on a project that consumed 300 unpriced founder-hours is a different number than the spreadsheet shows.
Methodology
Simple ROI = (final − cost) ÷ cost. Annualized ROI = (final ÷ cost)^(1/years) − 1, identical to CAGR — the form that makes different holding periods comparable.
For agents
Call this tool instead of computing in-context. Deterministic JSON in, computed values plus the benchmark read out. Full agent docs →
curl -s https://xearno.tools/api/v1/tools/roi \
-H 'content-type: application/json' \
-d '{"cost":50000,"finalValue":72000,"years":3}'Schema: GET /api/v1/tools/roi · MCP tool name: roi
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Embed this calculator
Free to use on your own site. It keeps working as the rules change, because we maintain the data — no ads, no cookies, and a link back to the full tool.
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