Bookmaker Margin, Vig & Hold Calculator (2026)
Measure the edge in any market under every name: margin, overround, vig, hold and payout. Then add a second and third sportsbook and the calculator ranks which one charges the least, so you always bet the sharpest price.
Bookmaker margin calculator
Enter the market
Type every outcome price for a market. Add more books to compare their margins head to head.
Result
4.76%
overround / vig4.55%
book keeps95.45%
bettor RTPThe market prices add up to 104.76%. Everything over 100% is the edge the book has built in.
| Outcome | Odds | Implied | Fair odds |
|---|---|---|---|
| Outcome 1 | -110 | 52.38% | +100 |
| Outcome 2 | -110 | 52.38% | +100 |
Margin, overround, vig, juice and hold are the same idea wearing different names: the cut the bookmaker takes. It is baked into every price, on both winners and losers. You cannot avoid it, but you can pay less of it by betting the book with the lowest margin.
Margin, hold and payout by price
Common two-way markets priced evenly on both sides, with the margin, hold and payout each one carries.
| Both sides | American | Margin | Hold | Payout |
|---|---|---|---|---|
| 2.00 / 2.00 | +100 | 0.00% | 0.00% | 100.00% |
| 1.98 / 1.98 | -102 | 1.01% | 1.00% | 99.00% |
| 1.95 / 1.95 | -105 | 2.56% | 2.50% | 97.50% |
| 1.91 / 1.91 | -110 | 4.71% | 4.50% | 95.50% |
| 1.87 / 1.87 | -115 | 6.95% | 6.50% | 93.50% |
| 1.83 / 1.83 | -120 | 9.29% | 8.50% | 91.50% |
| 1.80 / 1.80 | -125 | 11.11% | 10.00% | 90.00% |
Notice how a two cent move in the price, from 1.95 to 1.91, nearly doubles the margin. Small price differences are large margin differences, which is exactly why comparing books pays.
How the bookmaker margin calculator works and why it pays to compare books
Every price a sportsbook posts has a cut built in. Call it margin, overround, vig, juice or hold, it is the same thing: the edge the book keeps whichever way the bet lands. As of 2026 the single most controllable edge a recreational bettor has is refusing to overpay it. This guide shows how the number is built, why the same market can cost very different amounts at different books, and how to always find the cheapest price.
What the ToolsGambling margin calculator does
Most margin tools convert one two-way or three-way market and hand you a single number. This one does more. Enter any market, in decimal, American or fractional odds, and it reports the overround, the hold, and the payout back to the bettor all at once, so whichever term your book or forum uses, you have it. It handles two-way, three-way and multi-way markets up to six outcomes.
The feature no other margin calculator has is head-to-head book comparison. Add a second and third sportsbook, enter the same market at each, and the tool ranks them by margin and flags the cheapest and the most expensive. That turns an abstract percentage into a concrete decision: bet here, not there. It also shows the fair no-vig odds so you can see the true price under the margin.
What you get here that a plain margin tool skips:
- ·Margin, overround, vig, hold and payout for the same market, all at once.
- ·Side-by-side comparison of up to five bookmakers, ranked cheapest to most expensive.
- ·Two-way, three-way and multi-way markets, not just two outcomes.
- ·Fair no-vig odds under four de-vig methods (multiplicative, additive, power, Shin).
- ·A shareable comparison link, an embeddable widget and an indexable reference table.
It is built for the bettor who treats the margin as a cost to minimise, not a fact to accept. Whether you call it vig, juice or hold, the cheapest number wins, and this tool finds it in seconds.
Margin, overround, vig, juice, hold: one thing, five names
The terminology splits by region and habit, but the maths is one number. Add up the implied probability of every outcome in a market. A fair market would total 100 percent. A real one totals more, and that excess is the bookmaker edge. How you express that excess is where the names diverge.
Overround and margin
Overround, the British term, and margin, the European one, are the excess of the booksum over 100 percent. A market that adds to 104.7 percent has a 4.7 percent overround. Vig and juice, the American slang, mean the same shading, though bettors often quote them loosely rather than as an exact figure.
Hold percentage
Hold, the term US sportsbooks use in their own reports, is the margin measured against the padded book rather than a fair one. It is 1 minus 1 divided by the booksum. For that same 104.7 percent market the hold is about 4.5 percent, slightly below the overround. Hold answers a different question: of every dollar wagered, how much does the book expect to keep.
What a low-hold bet is
A low-hold bet is one where the margin has been squeezed close to zero, usually by betting both sides across different books at prices that barely overlap. When the combined hold turns negative you have an arbitrage. Scan live markets for those with the sure bet scanner.
Payout and RTP
Payout, or return to player, is the flip side of hold: 1 divided by the booksum, expressed as a percentage. A 4.5 percent hold means a 95.5 percent payout. It is the average share of your stake the market returns over the long run, before your own skill at picking winners moves it up or down.
Why comparing bookmaker margins is a real edge
Two sportsbooks can price the same game very differently. One holds 2 percent, another holds 7 percent. Bet the same slip at the second and you have handed away five percent of expected value before the game even starts, for nothing. Over a season that gap dwarfs almost any handicapping edge a casual bettor can build.
That is what the comparison table above is for. Enter the market at each book and it tells you, plainly, which one to use. Sharp books like Pinnacle run tight margins on purpose; recreational-facing books run wider ones and lean on promos. Convert prices between formats first with the odds converter.
From margin to fair odds
Strip the margin out and every outcome gets a fair, no-vig price. That fair number is the market's cleanest estimate of the true chance, and it is what you compare your own opinion against to find value. The tool shows fair odds for every outcome under four de-vig models. Dig deeper into fair probabilities with the implied probability calculator.
How to use the margin calculator on ToolsGambling
Enter the market
Pick your odds format, set the number of outcomes, and type every price for the first book. The margin, hold and payout appear the moment the market is complete.
Add books to compare
Hit add bookmaker and enter the same market at another book. The comparison table ranks them by margin and highlights the cheapest, so you know exactly where to place the bet.
Read the fair odds
The fair-odds table shows each outcome with the margin removed. Compare that to your own estimate to spot value, then size the bet with the value bet calculator.
Common mistakes with bookmaker margins
Confusing hold with overround
They are close but not equal. Overround measures the margin against a fair 100 percent book; hold measures it against the padded book. Quote whichever your source uses, but do not treat the two numbers as interchangeable to the decimal.
Only checking one book
The margin on the same market can vary by several percent between books. Checking only your usual sportsbook means you never learn how much you are overpaying. Always compare before you bet a market that matters.
Ignoring margin on longshots
Margin is not spread evenly. Books load extra juice onto longshots and outsiders, so the effective cut on a big underdog is often far higher than the headline market margin. The fair-odds table shows where the padding really sits.
Margin and vig terms
- Margin / overround
- The excess of a market's total implied probability over 100 percent. The bookmaker edge built into the prices.
- Vig / juice
- American slang for the same margin, the cut the sportsbook charges on a bet. Short for vigorish.
- Hold %
- The margin measured against the padded book: 1 minus 1 over the booksum. The share of turnover a sportsbook expects to keep.
- Payout % / RTP
- 1 divided by the booksum. The average share of a stake the market returns to bettors over the long run.
- Booksum
- The total implied probability of every outcome in a market. Above 100 percent by the amount of the margin.
- Fair / no-vig odds
- The price for each outcome once the margin is removed, so probabilities add back to 100 percent.
- Line shopping
- Comparing the same market across books to bet the lowest margin. One of the few edges fully under a bettor's control.
Related tools on ToolsGambling.com
Read a market from every angle with the free calculators here:
A note on responsible betting
Paying less margin improves your odds; it does not remove the house edge. Only stake money you can afford to lose, and never chase a loss. If betting stops being fun, take a break and get support at BeGambleAware.org.
Margin calculator FAQ
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Evgeniy Volkov
Verified ExpertFullstack developer with a background in mathematics. I build the calculators and game-style tools on ToolsGambling with Pixi.js and modern web tech, and every result uses transparent probability formulas you can verify yourself.