Decimal to Fractional Odds Converter
Convert European decimal odds to UK fractional format instantly
Decimal to Fractional Converter
Enter decimal odds to instantly convert to UK fractional format.
Quick Examples
Conversion Results
What is Decimal to Fractional Conversion?
Converting decimal odds to fractional odds transforms European-style betting odds into the traditional UK format. Decimal odds represent your total return (including stake), while fractional odds show only your profit relative to your stake. Both formats represent identical betting values.
Conversion Formula
Fractional = (Decimal - 1) simplified to lowest terms
Steps:
- Step 1: Subtract 1 from decimal odds (removes stake)
- Step 2: Convert to fraction (e.g., 2.50 = 250/100)
- Step 3: Simplify to lowest terms (250/100 = 5/2)
Example: 3.50 decimal = (3.50 - 1) = 2.50 = 250/100 = 5/2 fractional
Understanding Odds Formats
Decimal Odds (3.50)
Used In: Europe, Australia, Canada
Shows: Total return including stake
Calculation: Stake × Decimal = Total Return
Easier for quick payout calculations
Fractional Odds (5/2)
Used In: UK, Ireland, horse racing
Shows: Profit relative to stake
Calculation: (Stake × Fraction) + Stake = Total
Clearly displays profit margins
Same Bet Value
3.50 = 5/2 = Same Odds
$10 Bet Example:
Profit: $25 | Total Return: $35
Different display, identical value
Real-World Conversion Examples
Example 1: Favorite (Short Odds)
Decimal: 1.50
Conversion: 1.50 - 1 = 0.50 = 1/2
Fractional: 1/2
Meaning: Bet $20 to win $10 profit ($30 total return)
Example 2: Even Money
Decimal: 2.00
Conversion: 2.00 - 1 = 1.00 = 1/1
Fractional: 1/1 (Evens)
Meaning: Bet $50 to win $50 profit ($100 total return)
Example 3: Underdog (Long Odds)
Decimal: 11.00
Conversion: 11.00 - 1 = 10.00 = 10/1
Fractional: 10/1
Meaning: Bet $10 to win $100 profit ($110 total return)
Professional Conversion Tips
Memorize Common Odds
Learn frequently used conversions like 2.00 = 1/1, 3.00 = 2/1, 1.50 = 1/2 for quick mental calculations.
Check Both Formats
Some bookmakers offer better odds in different formats. Always compare to ensure you are getting the best value.
Understand Total vs Profit
Remember decimal shows total return while fractional shows profit only. This prevents confusion when calculating payouts.
Use for Arbitrage
Converting between formats helps identify arbitrage opportunities across bookmakers using different odds systems.
Verify Conversions
Always double-check conversions with a calculator when placing large bets to avoid costly mistakes.
Regional Preferences
UK bettors prefer fractional for horse racing, while international bettors often prefer decimal for simplicity.
Common Decimal to Fractional Conversions
| Decimal Odds | Fractional Odds | $10 Stake Example | Implied Probability |
|---|---|---|---|
| 1.10 | 1/10 | Win $1, Return $11 | 90.91% |
| 1.20 | 1/5 | Win $2, Return $12 | 83.33% |
| 1.25 | 1/4 | Win $2.50, Return $12.50 | 80.00% |
| 1.50 | 1/2 | Win $5, Return $15 | 66.67% |
| 2.00 | 1/1 (Evens) | Win $10, Return $20 | 50.00% |
| 2.50 | 3/2 | Win $15, Return $25 | 40.00% |
| 3.00 | 2/1 | Win $20, Return $30 | 33.33% |
| 3.50 | 5/2 | Win $25, Return $35 | 28.57% |
| 4.00 | 3/1 | Win $30, Return $40 | 25.00% |
| 5.00 | 4/1 | Win $40, Return $50 | 20.00% |
| 6.00 | 5/1 | Win $50, Return $60 | 16.67% |
| 11.00 | 10/1 | Win $100, Return $110 | 9.09% |
Frequently Asked Questions
How do you convert decimal odds to fractional odds?
To convert decimal odds to fractional, subtract 1 from the decimal odds, then simplify the resulting fraction. For example, 3.50 becomes 2.50, which simplifies to 5/2. The subtraction removes your stake from the total return to show just the profit.
What is the difference between decimal and fractional odds?
Decimal odds show your total return including stake (e.g., 3.50 means $3.50 back for every $1 bet), while fractional odds show only profit relative to stake (e.g., 5/2 means $2.50 profit for every $1 bet). Both represent the same value, just displayed differently.
Which odds format is better for betting?
Neither format is inherently better - it is personal preference and regional familiarity. Decimal odds are easier for quick payout calculations, while fractional odds clearly show profit margins. Most online bookmakers allow you to switch between formats.
Why are fractional odds still used in the UK?
Fractional odds are traditional in UK horse racing and betting, dating back centuries. British bettors are familiar with the format, and it clearly shows profit relative to stake, which many find intuitive for assessing bet value.
What does 2.00 decimal odds equal in fractional?
2.00 decimal odds equals 1/1 (also called evens or even money) in fractional format. This means you win the same amount as your stake - bet $10, win $10 profit, receive $20 total back.
Can all decimal odds be converted to simple fractions?
Most common decimal odds convert to simple fractions, but some decimal odds result in complex fractions that bookmakers may round. For example, 3.33 technically equals 233/100 but is often displayed as 7/3 in practice.