King's Top Tips
Accumulator Calculator
Free accumulator calculator. Add your selections, enter the odds and stake, and instantly see the combined odds and potential returns of your acca.
What this calculator does
Add your accumulator selections, enter the price for each leg and your stake, and instantly see the combined odds, potential returns and profit. Works with decimal odds (most common in modern UK bookmakers).
How combined odds work
An accumulator multiplies each leg's decimal odds together. A 4-fold at 2.00 × 1.80 × 2.20 × 1.65 returns combined odds of 13.07. A £10 stake at those odds returns £130.66 (£120.66 profit).
Acca tips before you stake
- Don't add "safe" legs at 1.20 just to boost the price — they're usually the leg that lets you down. Every leg should pass the value test.
- Watch correlation. Backing Liverpool to win and Salah to score in separate legs of an acca double-counts the same underlying outcome.
- Cap your stake. Even a clean +EV acca can run 10 in a row losing. Treat accas as small-stake plays, not bankroll engines.
For deeper acca strategy, read our accumulator strategy guide.
Frequently asked questions
How are accumulator returns calculated?
Multiply every selection's decimal odds together, then multiply by your stake. The calculator does this instantly and also shows your potential profit (returns minus stake).
What's the optimal accumulator size?
Most disciplined bettors stick to 3–5 legs. Each extra leg roughly halves your win probability, so an eight-fold acca rarely offers true value relative to the price. Our Acca Strategy guide explains the maths in more detail.
Can the calculator handle each-way or boosted odds?
It handles standard win-only accumulators. For each-way doubles or bookmaker price boosts, calculate the boosted odds first and enter the boosted figure as the leg odds — the multiplication still works exactly the same.