Calculate betting unit profit, losses, and bankroll impact from net units, unit size, and odds with payout and implied probability.
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Betting Unit Profit Formula
The calculator uses three formulas, one per tab.
Units to Profit
Profit = NetUnits × UnitSize
Odds Bet (win outcome)
Profit = StakeUnits × (DecimalOdds − 1) × UnitSize
Bankroll Unit Sizing
UnitSize = Bankroll × (UnitPercent / 100)
Variables:
- NetUnits: total units won minus units lost over a record of bets.
- UnitSize: the dollar value you assign to one unit.
- StakeUnits: how many units you risked on a single bet.
- DecimalOdds: odds in decimal form. American +150 = 2.50. American -110 = 1.9091. Fractional 10/11 = 1.9091.
- Bankroll: total money you have set aside for betting.
- UnitPercent: the share of bankroll one unit represents.
The Units to Profit tab converts a record into money. Enter your net units and your unit size and you get a dollar result, plus the bankroll change if you added a starting bankroll. The Odds Bet tab handles a single wager: it converts the odds to decimal, applies the win, loss, or push rule, and returns profit in units, profit in money, and total payout. The Bankroll tab works backward from your bankroll to set a unit size at a chosen risk percentage.
Reference Tables
Use these to sanity-check what you put into the calculator.
Unit sizing by risk style
| Style | Unit % | Unit on $1,000 | Bankroll units |
|---|---|---|---|
| Very conservative | 1% | $10 | 100 |
| Conservative | 2% | $20 | 50 |
| Moderate | 3% | $30 | 33 |
| Aggressive | 4% | $40 | 25 |
| Very aggressive | 5% | $50 | 20 |
Odds conversion and 1-unit profit on a win
| American | Decimal | Fractional | Profit on 1u win | Implied % |
|---|---|---|---|---|
| -200 | 1.50 | 1/2 | 0.50u | 66.67% |
| -110 | 1.91 | 10/11 | 0.91u | 52.38% |
| +100 | 2.00 | 1/1 | 1.00u | 50.00% |
| +150 | 2.50 | 3/2 | 1.50u | 40.00% |
| +200 | 3.00 | 2/1 | 2.00u | 33.33% |
| +300 | 4.00 | 3/1 | 3.00u | 25.00% |
Examples and FAQ
Example 1: Season record into dollars. You finished the NFL season at +12.5 units with a $25 unit. Profit = 12.5 × $25 = $312.50. With a $2,000 starting bankroll, your final bankroll is $2,312.50, a 15.63% gain.
Example 2: Single bet at -110. You stake 2 units at $50 per unit on a -110 line. Decimal odds are 1.9091. A win returns 2 × (1.9091 − 1) = 1.818 units, or $90.91 profit. A loss costs $100. A push returns the $100 stake.
What unit percentage should you use? Most bettors stay between 1% and 3%. Below 1% is slow but durable. Above 5% means a bad month can wipe out your bankroll.
Should units include the juice? Yes. A 1-unit loss at -110 still costs 1 unit. A 1-unit win at -110 only profits 0.91 units. Track results in units the same way you stake them.
Does a push count as a unit? No. A push returns the stake and counts as 0 units won and 0 units lost.
Can unit size change during the year? It can, but only resize when your bankroll moves enough to matter. Recalculating after every bet creates noise. Many bettors review unit size monthly or after a 20% bankroll swing.
