# Novig odds converter: percentages to American odds

> Independent. Not affiliated with, endorsed by or sponsored by Novig.

Canonical: https://novigapi.com/novig-odds-converter
Method checked: 2026-11-12
Interactive tool: https://novigapi.com/novig-odds-converter (prefill with ?a=&b=)

Novig shows prices as percentages. 40% equals +150 American (2.50 decimal); 60% equals -150. The formula: American = (100 / p - 1) x 100 when p is below 50%, and -p / (1 - p) x 100 above it. Live game-market takers also pay 0.06 x P x (1 - P) per $1 (Novig docs, checked 12 Nov 2026).

## Worked example

Novig price to American and decimal, with the live taker fee

| Novig price | American | Decimal | Live taker price | Live American |
| --- | --- | --- | --- | --- |
| 20% | +400 | 5.00 | 20.96% | +377 |
| 30% | +233 | 3.333 | 31.26% | +220 |
| 40% | +150 | 2.50 | 41.44% | +141 |
| 50% | -100 | 2.00 | 51.50% | -106 |
| 55% | -122 | 1.818 | 56.49% | -130 |
| 60% | -150 | 1.667 | 61.44% | -159 |
| 75% | -300 | 1.333 | 76.13% | -319 |
| 90% | -900 | 1.111 | 90.54% | -957 |

## Why Novig uses percentages

A Novig contract pays a fixed amount if it wins, so its price is the market's probability of that outcome. A 40% contract costs 40 cents per $1 of payout. Percentages make the exchange read like a market instead of a sportsbook: you can see both sides, and the two best prices add up to about 100% with only the spread between them.

```
p < 0.5:  American = +(1 - p) / p x 100
p >= 0.5: American = -p / (1 - p) x 100
decimal = 1 / p
```

## What the live fee does to the price

On game markets Novig charges the taker a fee only while the event is in play: 0.06 x P x (1 - P) per $1 of payout. At 40% that is $0.0144, so the real price is 41.44% and the American odds drop from +150 to about +141. Pregame fills on game markets pay no fee, and makers never pay.

## How to use it

1. Type the Novig price as a percentage.
2. Tick Live if the event is in play to include the taker fee.
3. Read American, decimal and fractional odds, or type American odds in the reverse box to get the Novig percentage.

## Questions

### Why did Novig change to percentage?

Novig prices contracts that pay a fixed amount, so the price is the probability. Showing it as a percentage makes both sides of the book comparable and shows there is no built-in vig.

### What is 60% on Novig in American odds?

60% is -150 American and 1.667 decimal before any fee.

### Does Novig charge a fee?

Takers pay 0.06 x P x (1 - P) per $1 of payout: on game markets only while the event is live, on NFL, NCAAF, NCAAB, NCAAWB, MLB, NBA, WNBA and NHL futures in every phase. Golf, tennis, UFC, F1 and NASCAR futures and series winners pay none. Makers never pay (Novig docs, checked 12 Nov 2026).

---

Get a free API key: https://novigapi.com/sign-up . Docs: https://novigapi.com/docs . MCP: https://novigapi.com/api/mcp . Operated by Stunning Couches LLC. Independent. Not affiliated with, endorsed by or sponsored by Novig.