What is a parlay builder?

Parlay Builder is a free tool for stacking two or more bets into one parlay. You pick sides from a live odds board, the slip shows combined odds and payout, and you can print a ticket. It is educational — it does not place a wager.

How do you calculate parlay payout?

Convert each American price to decimal, multiply those decimals together, then multiply by the stake. Parlay Builder does this as you build. A $100 stake on three −110 legs: 1.909 × 1.909 × 1.909 = 6.96. To pay is $695.79. This tool uses that same math.

How is this different from a parlay calculator?

A calculator asks you to type odds by hand. A parlay builder lets you pick legs from a board, keeps the slip, and shows payout on a printed ticket. This site is a builder with the payout math built in.

Can I build NFL, NBA, or MLB parlays?

Yes. Load a sport on the board and add legs. You can mix sports on one slip. The tool does not lock you to a single league.

What is a same-game parlay?

A same-game parlay (SGP) stacks more than one bet from a single game — for example a moneyline and a total. This builder allows one pick per game, so it is for cross-game parlays, not correlated same-game props.

Is this a sportsbook?

No. Parlay Builder does not accept wagers, hold a bankroll, or pay winners. Odds are public prediction-market prices and may be delayed or wrong. Nothing here is a recommendation to bet.

Is Parlay Builder free?

Yes. parlaybuilder.co is free to use. No account is required. The site is a lead magnet built by ArbBets and is for learning only.

Who built Parlay Builder?

Parlay Builder is built by the team behind ArbBets (getarbitragebets.com). ArbBets is a commercial product for automating arbitrage and delta-neutral strategies. This site stays educational and is not investment advice.

Guide

Parlay Builder is a free multi-sport parlay builder. Pick legs from live Polymarket odds, see combined odds and payout, and print an old-school ticket. Educational only — not a sportsbook and not a wager.

How parlays pay

Convert each American price to decimal odds. For a favorite, decimal = 100 ÷ |American| + 1. For an underdog, decimal = American ÷ 100 + 1. A −110 price is 1.909.
Multiply the decimal odds of every leg. That product is the parlay’s decimal odds.
Multiply the combined decimal by your stake. That is the total return if every leg hits, including the stake. Profit is return minus stake.

A $100 stake on three −110 legs: 1.909 × 1.909 × 1.909 = 6.96. To pay is $695.79. This tool uses that same math.

How to use Parlay Builder

Pick a side. Open the odds board and pick a side on a game. Switch sports anytime — legs stay on the slip.
Build the parlay. Add at least two legs. One pick per game. Combine NFL, NBA, MLB, or any loaded slate.
Set the stake. Stake starts at $100. Combined odds and payout update as you add or drop legs.
Print the ticket. Print when you are ready. Expand the printer to read a long slip. Print again as many times as you like.
Share the card. Share opens a 3D ticket page with the same slip. Export a still or a short video.

FAQ

What is a parlay builder?: Parlay Builder is a free tool for stacking two or more bets into one parlay. You pick sides from a live odds board, the slip shows combined odds and payout, and you can print a ticket. It is educational — it does not place a wager.
How do you calculate parlay payout?: Convert each American price to decimal, multiply those decimals together, then multiply by the stake. Parlay Builder does this as you build. A $100 stake on three −110 legs: 1.909 × 1.909 × 1.909 = 6.96. To pay is $695.79. This tool uses that same math.
How is this different from a parlay calculator?: A calculator asks you to type odds by hand. A parlay builder lets you pick legs from a board, keeps the slip, and shows payout on a printed ticket. This site is a builder with the payout math built in.
Can I build NFL, NBA, or MLB parlays?: Yes. Load a sport on the board and add legs. You can mix sports on one slip. The tool does not lock you to a single league.
What is a same-game parlay?: A same-game parlay (SGP) stacks more than one bet from a single game — for example a moneyline and a total. This builder allows one pick per game, so it is for cross-game parlays, not correlated same-game props.
Is this a sportsbook?: No. Parlay Builder does not accept wagers, hold a bankroll, or pay winners. Odds are public prediction-market prices and may be delayed or wrong. Nothing here is a recommendation to bet.
Is Parlay Builder free?: Yes. parlaybuilder.co is free to use. No account is required. The site is a lead magnet built by ArbBets and is for learning only.
Who built Parlay Builder?: Parlay Builder is built by the team behind ArbBets (getarbitragebets.com). ArbBets is a commercial product for automating arbitrage and delta-neutral strategies. This site stays educational and is not investment advice.