# Fair Odds Calculator (fairoddscalculator.com)

Strips the margin from two-sided betting odds to show fair probabilities and prices, plus expected value and parlay arithmetic.

- Atlas card: https://inite.ai/en/atlas/fairoddscalculator.com
- Site: https://fairoddscalculator.com
- For: People comparing betting odds who want the fair price behind a two-sided market before acting on it.
- Categories: lifestyle
- Use 0/100 · alive 100/100

## Used for

- remove the margin from a two-sided market price
- compare a posted price against your own probability
- multiply two to four parlay legs into one price

## Price

- free (read 2026-10-20 on https://fairoddscalculator.com/tools/)

## For developers

- OpenAPI: https://fairoddscalculator.com/openapi.json (8 paths)
- MCP server: com.fairoddscalculator/site (namespace; open on 2026-10-20, 7 tools)
- Read 2026-10-20

## MCP server, measured daily

Server: https://fairoddscalculator.com/mcp, checked every day since 2026-10-20 (2 checks).

- Answered: measuring, 2 daily checks so far
- Median first answer: 1392 ms
- Sign-in: none
- Context its tool definitions take: about 697 tokens (7 tools)
- Tool definitions: C, 71/100
- Failing "params_described": 5 of 7 tools
- Failing "annotations": 7 of 7 tools
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-20

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Source: INITE Atlas, https://inite.ai/en/atlas/fairoddscalculator.com. JSON: https://inite.ai/api/atlas/fairoddscalculator.com. MCP: https://inite.ai/api/mcp (atlas_lookup).