# Odds converter & payout calculator

> Convert betting odds between American, decimal and fractional formats, see the implied probability and calculate your payout and profit for any stake.

- URL: https://safebet.ai/tools/odds-calculator/
- Markdown version: https://safebet.ai/tools/odds-calculator/index.html.md
- Last updated: 2026-09-29
- Publisher: SafeBet.ai
- Editorial policy and advertiser disclosure: https://safebet.ai/editorial-policy/

Free betting tool

Convert odds between American, decimal and fractional formats, see the implied probability and calculate your payout — type into any field and the rest updates instantly.

Updated September 2026

## What is an odds calculator?

An odds calculator is a must-have tool for any sports bettor. It lets you quickly convert betting odds between formats — American, decimal and fractional — and instantly calculate your potential return and net profit based on your stake.

Different countries use different types of odds:

- 🇺🇸 **American odds** (e.g. +150 or -200) are standard in the United States.
- 🇪🇺 **Decimal odds** (e.g. 2.50) are common across Europe and at online sportsbooks.
- 🇬🇧 **Fractional odds** (e.g. 5/2 or 4/5) are traditional in the UK and Ireland.

Whether you’re comparing bets across different platforms or tipsters — or just want to understand how much you stand to win — this tool saves you time and ensures accuracy.

## Use our odds calculator to convert and calculate instantly

Our odds calculator does the heavy lifting for you. Enter your odds in any format and your stake, and you’ll see:

- 🔁 The converted odds in all three major formats
- 💰 Your total payout
- ✅ Your net profit and the implied probability

It’s fast, free and built for beginners and experienced bettors who want clean, instant answers.

## How to convert betting odds

American → decimal: +odds ÷ 100 + 1 (+150 → 2.50)\
American → decimal: 100 ÷ |odds| + 1 (-200 → 1.50)\
Fractional → decimal: numerator ÷ denominator + 1 (3/2 → 2.50)\
Implied probability = 1 ÷ decimal odds (2.50 → 40%)\
Payout = stake × decimal odds · Profit = payout − stake

## Straight odds vs. parlay odds

Wondering whether this tool works for single picks and parlays? It does. Here’s the difference between the two:

### ✅ Straight odds

A straight bet is a single wager on one outcome. The odds calculator instantly shows your return based on your stake and the odds you enter — perfect for moneylines, spreads and over/unders.

### 🔗 Parlay odds

A parlay combines two or more picks into one bet. Use our [parlay calculator](https://safebet.ai/tools/parlay-builder/) to stack multiple selections, then compare the combined odds here. With both tools working together, you can break down complex parlays or simple straight picks in seconds.

What it calculates

- American ⇄ decimal ⇄ fractional
- Implied probability
- Payout and profit for any stake
- Odds conversion chart

Rather let the AI do the math?

SafeBet sends 3 AI picks a day — each with an AI Safe Score and a full breakdown.

[See plans](https://safebet.ai/pricing/)

Reference

## Odds conversion chart

The most common betting odds in every format. Tap a row to load it into the converter.

| American | Decimal | Fractional | Implied probability |   |
| -------- | ------- | ---------- | ------------------- | - |
| -1000    | 1.10    | 1/10       | 90.9%               |   |
| -500     | 1.20    | 1/5        | 83.3%               |   |
| -400     | 1.25    | 1/4        | 80.0%               |   |
| -300     | 1.33    | 1/3        | 75.0%               |   |
| -250     | 1.40    | 2/5        | 71.4%               |   |
| -200     | 1.50    | 1/2        | 66.7%               |   |
| -175     | 1.57    | 4/7        | 63.6%               |   |
| -150     | 1.67    | 2/3        | 60.0%               |   |
| -130     | 1.77    | 10/13      | 56.5%               |   |
| -120     | 1.83    | 5/6        | 54.5%               |   |
| -110     | 1.91    | 10/11      | 52.4%               |   |
| -105     | 1.95    | 20/21      | 51.2%               |   |
| +100     | 2.00    | 1/1        | 50.0%               |   |
| +105     | 2.05    | 21/20      | 48.8%               |   |
| +110     | 2.10    | 11/10      | 47.6%               |   |
| +120     | 2.20    | 6/5        | 45.5%               |   |
| +130     | 2.30    | 13/10      | 43.5%               |   |
| +150     | 2.50    | 3/2        | 40.0%               |   |
| +175     | 2.75    | 7/4        | 36.4%               |   |
| +200     | 3.00    | 2/1        | 33.3%               |   |
| +250     | 3.50    | 5/2        | 28.6%               |   |
| +300     | 4.00    | 3/1        | 25.0%               |   |
| +400     | 5.00    | 4/1        | 20.0%               |   |
| +500     | 6.00    | 5/1        | 16.7%               |   |
| +1000    | 11.00   | 10/1       | 9.1%                |   |

FAQ

## Betting odds explained

### What does +150 mean in betting?

+150 means a $100 bet wins $150 in profit, for a total return of $250. Positive American odds show the profit on a $100 stake.

### What does -110 mean in betting?

-110 means you have to bet $110 to win $100 in profit. Negative American odds show how much you need to stake to win $100.

### What is implied probability?

The break-even win rate built into the odds: 1 ÷ the decimal odds. For example, -110 implies 52.4%, so you need to win more than 52.4% of those bets to make a profit.

### How do I convert American odds to decimal odds?

For positive odds: 1 + (odds ÷ 100). For negative odds: 1 + (100 ÷ the odds without the minus sign). So +150 becomes 2.50 and -200 becomes 1.50.

### What are fractional odds?

UK-style odds that show the profit relative to the stake: 5/2 means you win $5 for every $2 you stake, which is 3.50 in decimal odds.

## Know the odds. Now find the value.

Converting odds is step one. SafeBet’s AI compares its own odds with the sportsbook lines and sends you 3 picks a day where the value is.

[Get AI picks](https://safebet.ai/pricing/) or [Free weekly pick](https://safebet.ai/free-sports-pick/)