Best Free Betting Calculators

Free no-vig calculators for spreads, totals, props and multi-leg slips.

Free: Every calculator: devig for 2–4 way spreads, totals and props (four devig methods), a prop calculator for 2–6 leg slips, and a devig terminal. Ad-supported; the site says it's 100% free.

Catch: Calculators only: you bring the odds.

Score breakdown

How much is usable free	35/35	Everything is free (no paid tier, or the core product is free)
No signup / no card	15/15	Usable with no account
Data quality	17/20	Sharp/no-vig reference (7) · Works with any book (you enter odds) (4) · props: full (6)
Usefulness for +EV / line shopping	8/15	Supports the +EV workflow (devig, hedging, tracking, raw data)
Freshness	10/10	Calculator; worked on our check
Mobile app	0/5	Web only (or not verified)
Total	85/100

Price: Free · Checked Oct 16, 2026 · source

The classic devigger plus free-bet and risk-free-bet calculators.

Free: The classic devigger, hedge calculator, free-bet / risk-free-bet / odds-boost pages and more, no login shown.

Catch: Site says it's still a work in progress; calculators are partly hosted on the older site. We haven't verified prop support or how much of the +EV and arbitrage pages is free.

Score breakdown

How much is usable free	35/35	Everything is free (no paid tier, or the core product is free)
No signup / no card	15/15	Usable with no account
Data quality	11/20	Sharp/no-vig reference (7) · Works with any book (you enter odds) (4) · props: none (0)
Usefulness for +EV / line shopping	8/15	Supports the +EV workflow (devig, hedging, tracking, raw data)
Freshness	10/10	Calculator; worked on our check
Mobile app	0/5	Web only (or not verified)
Total	79/100

Price: not listed on site · Checked Oct 16, 2026 · source

Bet calculators for singles, parlays and system bets.

Free: Bet calculators for singles, parlays and system bets (UK, US and Canada versions), plus iOS and Android calculator apps.

Catch: Settles bets; it doesn't devig or find value. UK-focused site with heavy sportsbook advertising.

Score breakdown

How much is usable free	35/35	Everything is free (no paid tier, or the core product is free)
No signup / no card	15/15	Usable with no account
Data quality	4/20	No sharp reference (0) · Works with any book (you enter odds) (4) · props: none (0)
Usefulness for +EV / line shopping	2/15	Other betting utility
Freshness	10/10	Calculator; worked on our check
Mobile app	5/5	iOS and Android
Total	71/100

Price: not listed on site · Checked Oct 16, 2026 · source