# Same game parlay calculator

A same game parlay combines selections from one event. Enter the sportsbook’s combined quote to calculate the payout if every leg wins, then compare it with the product of the individual decimal prices. That product is an independent-pricing reference, not a valid SGP quote or fair probability. The price gap cannot isolate correlation from margin and other pricing decisions.

Canonical page: https://getoddsapi.com/same-game-parlay-calculator

## Free API key

Get a free GetOdds API key: **1,000 requests per UTC day and 60 per minute, no card**. One key covers REST and the hosted MCP server.

Sign up: https://getoddsapi.com/sign-up?ref=ai-claudebot

## Quickstart

1. Create an account at https://getoddsapi.com/sign-up?ref=ai-claudebot, open https://getoddsapi.com/dashboard and issue a key with the sources you need (draftkings, fanduel, betrivers, prizepicks or underdog). Keep it in a server environment variable named GETODDS_API_KEY.
2. Read current DraftKings NBA spreads with curl:

```bash
curl --fail-with-body "https://getoddsapi.com/api/v1/odds?sport=NBA&market=spread&fresh_only=true&limit=50" \
  -H "Authorization: Bearer $GETODDS_API_KEY"
```

3. The same request in Python (standard library only):

```python
import json, os, urllib.request

req = urllib.request.Request(
    "https://getoddsapi.com/api/v1/odds?sport=NBA&market=spread&fresh_only=true&limit=50",
    headers={"Authorization": "Bearer " + os.environ["GETODDS_API_KEY"]},
)
with urllib.request.urlopen(req) as res:
    rows = json.load(res)["data"]
for row in rows:
    print(row["away"], "at", row["home"], row["side"], row["line"], row["american"], row["observed_at"])
```

4. Check `observed_at`, `age_seconds` and `stale` on every row before using a price. Full reference: https://getoddsapi.com/docs

## Use with Claude (MCP)

```bash
claude mcp add --transport http getodds https://getoddsapi.com/api/mcp \
  --header "Authorization: Bearer $GETODDS_API_KEY"
```

The MCP tools follow the key's source grants and share its allowance. Setup guide: https://getoddsapi.com/use-with-claude

## Pricing

| Plan | Allowance | Price |
| --- | --- | --- |
| Free key | 1,000 requests a day, 60 a minute | $0, no card |
| Developer Bundle | 10,000 requests or credits a month on each of four sources | $149 a month |

Free development allowance: 1,000 requests per UTC day and 60 per minute per account, with no payment step. Paid: the Developer Bundle at $149 per month, with 10,000 monthly requests or credits on each of four sources.
Details: https://getoddsapi.com/bundle

## Calculator


Canonical page: https://getoddsapi.com/same-game-parlay-calculator
Markdown version: https://getoddsapi.com/same-game-parlay-calculator.md
Language: English. Formula review date: 2026-11-06.

A same game parlay combines selections from one event. Enter the sportsbook’s combined quote to calculate the payout if every leg wins, then compare it with the product of the individual decimal prices. That product is an independent-pricing reference, not a valid SGP quote or fair probability. The price gap cannot isolate correlation from margin and other pricing decisions.

## Inputs

| Input | Default example | Instructions |
| --- | --- | --- |
| Individual leg odds | -110,-110 | Enter 2 to 10 comma-separated prices for the same selections and lines, e.g. -110,-110. No void placeholders. |
| Quoted combined SGP odds | +200 | Copy the combined quote for the exact ticket. +200 is an editable illustration, not a live sportsbook offer. |
| Stake ($) | 100 | Cash risked. Total return includes this stake; profit subtracts it. |

## Formula

Quoted return = stake × offered D. Independent reference = d₁ × … × dₙ. Price difference (%) = (offered D ÷ reference D − 1) × 100.

## Worked example

Two individual −110 prices multiply to a 3.644628 decimal reference. A combined quote of +200 is 3.00. At a $100 stake, the quoted all-win return is $300 and profit is $200. The independent reference return is $364.46; the quoted decimal price is 17.6871% lower. This difference is not a measured correlation coefficient or proof of poor value.

| Result | Value | Working |
| --- | --- | --- |
| Quoted SGP return if all win | $300 | 100 × 3 |
| Quoted SGP net profit if all win | $200 | Quoted return − stake |
| Quoted SGP decimal odds | 3 | Your entered combined sportsbook quote |
| Quoted SGP American odds | 200 | Same offered quote in American format |
| Quoted SGP break-even | 33.3333% | 100 ÷ offered decimal; not an estimated joint win probability |
| Independent reference decimal odds | 3.6446 | 1.909091 × 1.909091 |
| Independent reference American odds | 264.4628 | Conversion of the product-of-prices reference |
| Independent reference return | $364.4628 | 100 × 3.644628; not an available sportsbook payout |
| Quoted versus reference price difference | -17.6871% | (3 ÷ 3.644628 − 1) × 100; includes margin and pricing differences, not measured correlation |
| Quoted versus reference return difference | $-64.4628 | Quoted payout − independent reference payout at the same stake |

## Assumptions and limits

The comparison does not estimate true joint probability, correlation, fair odds or expected value. Individual and combined prices include pricing effects and margin. Quotes from different times, lines or settlement terms may not be comparable. Use the actual combined quote for payouts. This tool models all selections winning; it does not reprice a pushed or voided SGP, cash-outs, boosts, taxes or fees. No guaranteed edge is implied.

Inputs are supplied by the user. These calculators do not fetch live sportsbook prices, estimate a win probability, or recommend selections. Monetary examples use USD. Calculations run in the browser without an account. A shared calculation URL contains its entered numbers.

## Compare the exact same selections

Enter each individual price and the combined quote from the same ticket. A player total of 24.5 is not interchangeable with 25.5, and a price recorded before a lineup change may not describe the same market. The calculator cannot verify that prices are current or that a sportsbook permits the requested combination.

Total return includes the cash stake. Net profit subtracts it. For a $100 stake at +200, these are $300 and $200 respectively, provided every selection wins and the ticket settles at the entered quote. The combined quote controls this payout regardless of how the individual odds multiply.

## What the independent reference can and cannot show

Multiplying individual decimal prices is the arithmetic reference used by a conventional independently priced parlay. In a same-game ticket, outcomes can depend on one another: a team’s performance and a player’s performance may overlap. The independent reference is therefore not a forecast or an alternate price you can necessarily obtain.

The displayed percentage is a ratio of decimal return multipliers. It is not the percentage change in net profit, a correlation coefficient, an estimate of house edge or a no-vig probability. A negative value says only that the offered combined multiplier is smaller than the product of the entered single-leg multipliers. A positive value likewise does not prove an advantage.

## Break-even is a threshold, not a prediction

For an all-or-nothing cash ticket with no pushes or other settlement outcomes, the break-even probability is one divided by the offered decimal price. At 3.00 that threshold is 33.3333%. The calculator does not say that your selections have a 33.3333% chance of winning together.

Establishing expected value would require a defensible joint probability model and the actual terms. Multiplying margin-inclusive individual implied probabilities is not enough, and removing margin from each leg would still leave dependence unresolved. This comparison deliberately stops at transparent price arithmetic.

## Voids, pushes and changing quotes

If the ticket is repriced after a void or push, use the replacement combined quote to calculate its payout. Do not assume the original SGP multiplier can be divided by a removed leg’s standalone price. Operator-specific repricing and sport rules need to be checked separately.

These examples are user-editable and contain no live feed. Copy link preserves the entered prices in the URL; Copy result includes the assumptions. Before comparing two quotes, check that the selections, timing, stake and settlement conditions match.

## Sources and rule checks

- [DraftKings: combined SGP selections and quoted odds](https://support.draftkings.com/dk/en-us/what-is-a-same-game-parlay-sgp-bet?id=kb_article_view&sysparm_article=KB0010719)
- [DraftKings: general rules and correlated selections](https://sportsbook.draftkings.com/help/general-betting-rules/general-rules)

## Questions and answers

### Can I multiply the odds for a same game parlay?

You can calculate that product as an independent reference. Use the sportsbook’s actual combined quote for the SGP payout; dependence can make multiplication inappropriate as a price.

### Does the price gap measure correlation?

No. It mixes margin and other pricing decisions with any effect of dependence. The tool cannot identify a correlation coefficient or true joint win probability.

### How much does a $100 four-leg SGP pay?

The combined quoted price determines the payout, not the number of legs alone. Enter four individual prices for comparison and the combined quote. At +500, a winning $100 ticket returns $600, including stake.

### Can this find a profitable SGP?

No. It does not supply probabilities or recommendations. A higher quote relative to an independent reference does not establish positive expected value.

## Embedding

Embed: https://getoddsapi.com/embed/same-game-parlay-calculator
Keep a visible attribution link to the canonical explanation. Embed pages are noindex; use the canonical page for indexing and citations.

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Independent educational product, not affiliated with any sportsbook or pick’em operator. Results are arithmetic, not predictions or betting advice. Only participate where lawful and within limits you can afford.
Responsible gambling resources: https://www.ncpgambling.org/