What does the Free bet SNR calculator show?

It estimates the SNR lay stake and extracted value before charges and market constraints.

Should I treat the result as a forecast?

No. It is a calculation based on the values entered. Market rules, settlement and price movement can change how a real bet is settled.

Free Bet SNR Calculator for Return and Lay Stake

Last updated: 22 August 2026 Written by Ellie Marsden, Senior Betting Editor Fact checked by Tom Brackley, Odds Analyst

What this calculator answers

Estimate the cash value of a stake not returned free bet by comparing the free bet back position with an entered lay price and commission rate.

Formula and worked example

Formula: Lay stake = free bet stake times (back odds minus 1) divided by (lay odds minus commission). Extracted value is lay stake times (1 minus commission).

For a 10.00 free bet at 5.00, lay odds 5.20 and 2 percent commission, the lay stake is 7.72. If the lay side wins, the extracted value is about 7.57.

Checks before using the result

Using the stake returned formula for a stake not returned bet.
Entering commission as 2 instead of 0.02 in a manual formula.
Ignoring minimum stakes and market availability.

When the calculation does not apply

It applies to a stake not returned free bet only. Price movement, partial matching, limits, charges and market rules can change the outcome.

Keep the number in context

A calculator makes the arithmetic visible, but it does not decide whether a price fits your budget or information. Write down the stake before placing anything, check the market rules, and keep essential money separate. The result is a planning figure, not a prediction of what will happen.

For another view, visit the calculator hub, compare the Odds converter and System bet, or read the guide to free bets. These tools use the same price conventions, so you can check a number from more than one angle.

Reading a rounded result

Displayed money amounts are rounded to two decimal places, while a real settlement can apply its own rounding sequence. Keep the original inputs beside the result if you need to repeat the calculation later.

If an input is unclear, pause and find the stated market term rather than guessing. A useful check is to change one input by a small amount and see whether the result moves in the direction you expect.

That does not validate the market, but it can reveal a reversed sign, an incorrect price format or a duplicated stake. Use the final figure as an aid to understanding the arithmetic, not as a reason to ignore a limit you set in advance.