ROI & Betting Results CalculatorFree · works in your browser · nothing is stored
Results appear here as you type.
For information and entertainment only — not betting, financial or legal advice. Results are estimates based on your inputs.
How the ROI & Betting Results Calculator works
Keep a simple record of how many bets you placed, how many won, the total you staked and the total returned. This shows whether you are ahead or behind and how big your edge or loss is relative to turnover.
Formula
- Profit = total returned − total staked
- ROI = profit ÷ total staked
- Strike rate = bets won ÷ bets placed
Worked example
120 bets, 58 wins, 1,200 staked and 1,290 returned: profit 90, ROI +7.5%, strike rate 48.3%.
Frequently asked questions
How many bets do I need before ROI means anything?
Hundreds or thousands. Short samples are dominated by luck, so treat a small-sample ROI with caution.
Play responsibly
Calculators describe maths, not outcomes. Gambling is for adults aged 18+ and can be addictive — set limits and never stake money you cannot afford to lose.