Most odds converters handle one price at a time. This Odds Conversion Chart Generator builds a full custom reference table across any decimal range you choose.
Use it to generate a conversion grid for decimal odds, American odds, fractional odds, and implied probability. Set the start price, end price, and step size, then export the finished table as a CSV file for Excel, Google Sheets, or your own betting model.
Quick examples: generate favorites from 1.10 to 2.00, mid-range prices from 2.00 to 5.00, or longshots from 5.00 to 20.00. For a single-price converter, use the main Odds Converter.
Odds Conversion Table Generator
Create a custom conversion table and export it as CSV.
| Decimal | American | Fractional | Implied Probability |
|---|
Note: fractional values in the generated table are mathematical conversions of the displayed decimal price. Some traditional bookmaker-board fractions may use nearby standard prices instead.
What This Generator Does
- Creates a custom odds table: choose your own decimal range and step size.
- Converts every row: decimal, American, fractional, and implied probability are shown together.
- Exports CSV: download the result for Excel, Google Sheets, or a betting spreadsheet.
- Supports common presets: favorites, mid-range prices, and longshots.
How to Use the Generator
- Choose a preset: use Favorites, Mid-Range, or Longshots for a fast starting point.
- Set the decimal range: enter the start and end prices, such as 1.20 to 3.00.
- Choose step size: use 0.05 for a detailed grid or 0.25 for a broader table.
- Generate the table: the calculator renders the conversion rows instantly.
- Download CSV: export the generated data for spreadsheet use.
Common Odds Conversion Table
Here are common betting prices for quick reference. The implied probability is the break-even win rate from one listed price before removing full-market vig.
| Decimal | American | Fractional | Implied Probability |
|---|---|---|---|
| 1.10 | -1000 | 1/10 | 90.91% |
| 1.25 | -400 | 1/4 | 80.00% |
| 1.50 | -200 | 1/2 | 66.67% |
| 1.91 | -110 | 91/100 mathematically; often shown near 10/11 | 52.36% |
| 2.00 | +100 | 1/1 | 50.00% |
| 2.50 | +150 | 3/2 | 40.00% |
| 3.00 | +200 | 2/1 | 33.33% |
| 5.00 | +400 | 4/1 | 20.00% |
| 11.00 | +1000 | 10/1 | 9.09% |
| 51.00 | +5000 | 50/1 | 1.96% |
Odds Conversion Formulas
Decimal to American Odds
For decimal odds of 2.00 or higher:
American Odds = (Decimal Odds – 1) × 100
For decimal odds below 2.00:
American Odds = -100 ÷ (Decimal Odds – 1)
Decimal to Fractional Odds
Fractional odds show profit relative to stake:
Fractional Odds = Decimal Odds – 1
The profit part is then expressed as a simplified fraction. For example, decimal 2.50 gives 2.50 – 1 = 1.50, which simplifies to 3/2.
Decimal Odds to Implied Probability
Implied Probability = (1 ÷ Decimal Odds) × 100
For example, decimal odds of 4.00 imply a 25% break-even probability.
When to Use a Custom Conversion Table
Building a Betting Spreadsheet
If you are building a model in Excel or Google Sheets, a conversion table can save time. Generate the range you need, export the CSV, then use lookup formulas to map decimal odds to American odds, fractional prices, or implied probability.
Comparing Sportsbooks Across Regions
One sportsbook may show decimal prices while another uses American or UK fractional format. A custom chart gives you a quick reference for line shopping without manually converting every price.
Printing a Desk Reference
Generate the range you use most often, download the CSV, format it in a spreadsheet, and print it as a desk reference.
Mathematical Fractions vs Bookmaker Fractions
The generated fractional column shows the mathematical conversion of the displayed decimal price. This is useful for spreadsheet accuracy, but it may differ from a traditional bookmaker-board fraction.
For example, American -110 converts to decimal 1.909…. If rounded to 1.91, the mathematical fraction is 91/100. Traditional sportsbook discussion often treats the same price as approximately 10/11. These are close, but not always identical.
Frequently Asked Questions
What is an odds conversion chart?
It is a reference table that shows the same betting price in multiple formats, usually decimal, American, fractional odds, and implied probability.
How do I convert decimal odds to American odds?
If decimal odds are 2.00 or higher, subtract 1 and multiply by 100. If decimal odds are below 2.00, divide -100 by decimal odds minus 1.
How do I convert decimal odds to implied probability?
Divide 1 by the decimal odds and multiply by 100. For example, decimal odds of 2.50 imply a 40% break-even probability.
Can I export the generated table?
Yes. The calculator includes a CSV export button. The file can be opened in Excel, Google Sheets, or imported into a betting model.
Why do some fractional odds look approximate?
Decimal prices can be rounded before conversion. The resulting mathematical fraction may differ from a traditional bookmaker-board fraction such as 10/11 or 6/4.
Does the chart remove bookmaker margin?
No. It converts odds formats and shows the break-even probability from each price. It does not remove margin from a full market.