SBR Top-Rated Sportsbooks Recommended Books
1. Pinnacle Sports SBR Rating A+ Pinnacle Sports Review
2. The Greek Sports Book SBR Rating A+ The Greek Review
3. BookMaker SBR Rating A+ BookMaker Review
4. BetJamaica SBR Rating A+ BetJamaica Review
5. LegendZ Sports SBR Rating A+ LegendZ Review
 
SBR Posters' Poll - March 2009 View Complete Results
1. BetJamaica 251 total points BetJamaica Review
2. The Greek Sports Book 217 total points The Greek Review
3. 5Dimes 181 total points 5Dimes Review
4. Matchbook 159 total points Matchbook Review
5. Pinnacle Sports 148 total points Pinnacle Sports Review
 
Reply View New Posts
 
LinkBack Thread Tools
Old 05-12-2007, 02:18 AM   #1
pico
USC ml
 
pico's Avatar
Join Date: 04-05-07
Posts: 20,765
 
Default Math Tip for converting between decimal and american odds

american odds is pretty easy. +130 means you win 130 for 100 wager, and -140 means you win 100 for 140 wager.

the formula to convert it to decimal odds is for all plus money odds, you just add 100 and divide it by 100. for example, +130 will be 2.30 in decimal odds.

for minus money, the math gets a bit harder. divid it by 100, take the inverse and add 1. for example, -140 will be 1.71 in decimal pricing.

as you can see it is pretty easy to go back and forth for plus money odds, but the real question is how do you convert minus money odds in your head? (don't really want to keep my spreadsheet open everytime i want to make a bet)

does anyone know the rational behind the decimal system? i am still puzzled why 2 is the even money bet? why don't they make 1 the even money bet, so you don't have to add one when you go from american to decimal.
Reply With Quote Multi-Quote This Message Quick reply to this message
Old 05-12-2007, 04:04 AM   #2
tribet
 
tribet's Avatar
Join Date: 08-12-06
Posts: 166
 
Default

The rational behind decimals is that it is simple and the accepted notation in most countries why bother with strange American odds when you can stick t decimals.
Reply With Quote Multi-Quote This Message Quick reply to this message
Old 05-12-2007, 07:07 AM   #3
20Four7
 
20Four7's Avatar
Join Date: 04-08-07
Posts: 2,751
 
Default

I prefer american odds as that's what I have always known. I rarely have to convert between them but if I do I just use this
http://www.smartcapper.com/cgi-bin/b...=D&dec_odds=10
Reply With Quote Multi-Quote This Message Quick reply to this message
Old 05-12-2007, 08:55 AM   #4
Ganchrow
 
Ganchrow's Avatar
Join Date: 08-28-05
Posts: 5,306
 
Default

Quote:
Originally Posted by picoman View Post
american odds is pretty easy. +130 means you win 130 for 100 wager, and -140 means you win 100 for 140 wager.

the formula to convert it to decimal odds is for all plus money odds, you just add 100 and divide it by 100. for example, +130 will be 2.30 in decimal odds.

for minus money, the math gets a bit harder. divid it by 100, take the inverse and add 1. for example, -140 will be 1.71 in decimal pricing.
To make it explicit:

For US odds ≤ -100:
Code:
                       100
Decimal odds = 1 - -----------
		     US Odds
For US odds ≥ +100:
Code:
                     US Odds
Decimal odds = 1 + -----------
		       100
And to convert from decimal to US:
Code:
For decimal odds ≥ 2: US = 100×(decimal-1)

For decimal odds < 2: US = -100/(decimal-1)
Quote:
Originally Posted by picoman View Post
does anyone know the rational behind the decimal system? i am still puzzled why 2 is the even money bet? why don't they make 1 the even money bet, so you don't have to add one when you go from american to decimal.
The rationale is rather straightforward. Decimal odds represent the dollar amount returned to you on a win off a 1-unit bet including your original stake. For example:
  • If decimal odds were 2.00 (US: +100), this would mean that if you were to bet $1.00 and win you'd be returned $2.00 ($1.00 in winnings plus your $1 original bet).
  • If decimal odds were 1.50 (US: -200), this would mean that if you were to bet $1.00 and win you'd be returned $1.50 ($0.50 in winnings plus your $1 original bet).
__________________

Reply With Quote Multi-Quote This Message Quick reply to this message
Old 05-12-2007, 08:55 AM   #5
Ganchrow
 
Ganchrow's Avatar
Join Date: 08-28-05
Posts: 5,306
 
Default

Quote:
Originally Posted by 20Four7 View Post
I prefer american odds as that's what I have always known. I rarely have to convert between them but if I do I just use this
http://www.smartcapper.com/cgi-bin/b...=D&dec_odds=10
You could also use my odds converter (and the other betting tools) available here: SBR Betting Tools.
__________________

Reply With Quote Multi-Quote This Message Quick reply to this message
Old 05-12-2007, 09:03 AM   #6
BuddyBear
 
BuddyBear's Avatar
Join Date: 08-10-05
Posts: 6,520
 
Default

Usually sportsbooks have a feature that allows you to select one or the other....
Reply With Quote Multi-Quote This Message Quick reply to this message
Old 05-12-2007, 09:35 AM   #7
WWTSblows
 
WWTSblows's Avatar
Join Date: 10-14-06
Posts: 161
 
Default

Not always though. For the negative ones, I have the same system you do. I use a calculator on my desk for those.

If you are good at math, you can use that way to get close. Like knowing 14 goes into 100 roughly 7 times can get you to -170 in your head.
Reply With Quote Multi-Quote This Message Quick reply to this message
Old 05-12-2007, 10:27 AM   #8
pico
USC ml
 
pico's Avatar
Join Date: 04-05-07
Posts: 20,765
 
Default thank ganchrow

is there anything you don't know about gambling? maybe i should just hire you as a consultant when i have a sizable amount of gambling money.
Reply With Quote Multi-Quote This Message Quick reply to this message
Old 07-26-2008, 12:44 PM   #9
Scorpion
 
Scorpion's Avatar
Join Date: 09-04-05
Posts: 1,389
 
Default

How about a formula for converting Fraction odds to US odds?
I know you can convert Fraction to Decimal and then to US
Reply With Quote Multi-Quote This Message Quick reply to this message
Old 07-26-2008, 02:06 PM   #10
Ganchrow
 
Ganchrow's Avatar
Join Date: 08-28-05
Posts: 5,306
 
Default

Quote:
Originally Posted by Scorpion View Post
How about a formula for converting Fraction odds to US odds?
I know you can convert Fraction to Decimal and then to US
Yeah, that's exactly it:

Code:
fractional = decimal - 1
Hence, to convert from fractional to US odds:
Code:
For fractional odds ≥ 1: US = 100×fractional

For fractional odds < 1: US = -100/fractional
__________________

Reply With Quote Multi-Quote This Message Quick reply to this message
Old 07-26-2008, 07:45 PM   #11
RogueJuror
RIP Alexis Arguello
 
RogueJuror's Avatar
Join Date: 07-08-08
Posts: 8,072
 
Default

Ganchrow incorporate Indonesian, Malysian, HK odds in your odds converter calc and then it'll be the complete package. I'll tout it all over asia if you do, an easy way to double the traffic. If you need the math equations just PM me.


Code:
Indo Odds	Malay Odds	HK/ Decimal			
-1.01	-1.04	0.99	0.96	1.99	1.96
-1.02	-1.03	0.98	0.97	1.98	1.97
-1.03	-1.02	0.97	0.98	1.97	1.98
-1.04	-1.01	0.96	0.99	1.96	1.99
-1.05	-1.00	0.95	1.00	1.95	2.00
-1.06	1.01	0.94	-0.99	1.94	2.01
-1.07	1.02	0.93	-0.98	1.93	2.02
-1.08	1.02	0.93	-0.98	1.93	2.02
-1.09	1.03	0.92	-0.97	1.92	2.03
-1.10	1.04	0.91	-0.96	1.91	2.04
-1.11	1.05	0.90	-0.95	1.90	2.05
-1.12	1.06	0.89	-0.94	1.89	2.06
-1.13	1.07	0.88	-0.93	1.88	2.07
-1.14	1.08	0.88	-0.93	1.88	2.08
-1.15	1.09	0.87	-0.92	1.87	2.09
-1.16	1.10	0.86	-0.91	1.86	2.10
-1.17	1.11	0.85	-0.90	1.85	2.11
-1.18	1.11	0.85	-0.90	1.85	2.11
-1.19	1.12	0.84	-0.89	1.84	2.12
-1.20	1.13	0.83	-0.88	1.83	2.13
-1.21	1.14	0.83	-0.88	1.83	2.14
-1.22	1.15	0.82	-0.87	1.82	2.15
-1.23	1.16	0.81	-0.86	1.81	2.16
-1.24	1.17	0.81	-0.86	1.81	2.17
-1.25	1.18	0.80	-0.85	1.80	2.18
-1.26	1.19	0.79	-0.84	1.79	2.19
-1.27	1.19	0.79	-0.84	1.79	2.19
-1.28	1.20	0.78	-0.83	1.78	2.20
-1.29	1.21	0.78	-0.83	1.78	2.21
-1.30	1.22	0.77	-0.82	1.77	2.22
-1.31	1.23	0.76	-0.81	1.76	2.23
-1.32	1.24	0.76	-0.81	1.76	2.24
-1.33	1.25	0.75	-0.80	1.75	2.25
-1.34	1.26	0.75	-0.80	1.75	2.26
-1.35	1.26	0.74	-0.79	1.74	2.26
-1.36	1.27	0.74	-0.79	1.74	2.27
-1.37	1.28	0.73	-0.78	1.73	2.28
-1.38	1.29	0.72	-0.77	1.72	2.29
-1.39	1.30	0.72	-0.77	1.72	2.30
-1.40	1.31	0.71	-0.76	1.71	2.31
-1.41	1.32	0.71	-0.76	1.71	2.32
-1.42	1.33	0.70	-0.75	1.70	2.33
-1.43	1.33	0.70	-0.75	1.70	2.33
-1.44	1.34	0.69	-0.74	1.69	2.34
-1.45	1.35	0.69	-0.74	1.69	2.35
-1.46	1.36	0.68	-0.73	1.68	2.36
-1.47	1.37	0.68	-0.73	1.68	2.37
-1.48	1.38	0.68	-0.73	1.68	2.38
-1.49	1.39	0.67	-0.72	1.67	2.39
-1.50	1.40	0.67	-0.72	1.67	2.40
-1.51	1.40	0.66	-0.71	1.66	2.40
-1.52	1.41	0.66	-0.71	1.66	2.41
-1.53	1.42	0.65	-0.70	1.65	2.42
-1.54	1.43	0.65	-0.70	1.65	2.43
-1.55	1.44	0.65	-0.70	1.65	2.44
-1.56	1.45	0.64	-0.69	1.64	2.45
-1.57	1.46	0.64	-0.69	1.64	2.46
-1.58	1.46	0.63	-0.68	1.63	2.46
-1.59	1.47	0.63	-0.68	1.63	2.47
-1.60	1.48	0.63	-0.68	1.63	2.48
-1.61	1.49	0.62	-0.67	1.62	2.49
-1.62	1.50	0.62	-0.67	1.62	2.50
-1.63	1.51	0.61	-0.66	1.61	2.51
-1.64	1.52	0.61	-0.66	1.61	2.52
-1.65	1.52	0.61	-0.66	1.61	2.52
-1.66	1.53	0.60	-0.65	1.60	2.53
-1.67	1.54	0.60	-0.65	1.60	2.54
-1.68	1.55	0.60	-0.65	1.60	2.55
-1.69	1.56	0.59	-0.64	1.59	2.56
-1.70	1.57	0.59	-0.64	1.59	2.57
-1.71	1.58	0.58	-0.63	1.58	2.58
-1.72	1.58	0.58	-0.63	1.58	2.58
-1.73	1.59	0.58	-0.63	1.58	2.59
-1.74	1.60	0.57	-0.62	1.57	2.60
-1.75	1.61	0.57	-0.62	1.57	2.61
-1.76	1.62	0.57	-0.62	1.57	2.62
-1.77	1.63	0.56	-0.61	1.56	2.63
-1.78	1.63	0.56	-0.61	1.56	2.63
-1.79	1.64	0.56	-0.61	1.56	2.64
-1.80	1.65	0.56	-0.61	1.56	2.65
-1.81	1.66	0.55	-0.60	1.55	2.66
-1.82	1.67	0.55	-0.60	1.55	2.67
-1.83	1.68	0.55	-0.60	1.55	2.68
-1.84	1.68	0.54	-0.59	1.54	2.68
-1.85	1.69	0.54	-0.59	1.54	2.69
-1.86	1.70	0.54	-0.59	1.54	2.70
-1.87	1.71	0.53	-0.58	1.53	2.71
-1.88	1.72	0.53	-0.58	1.53	2.72
-1.89	1.73	0.53	-0.58	1.53	2.73
-1.90	1.74	0.53	-0.58	1.53	2.74
-1.91	1.74	0.52	-0.57	1.52	2.74
-1.92	1.75	0.52	-0.57	1.52	2.75
-1.93	1.76	0.52	-0.57	1.52	2.76
-1.94	1.77	0.52	-0.57	1.52	2.77
-1.95	1.78	0.51	-0.56	1.51	2.78
-1.96	1.79	0.51	-0.56	1.51	2.79
-1.97	1.79	0.51	-0.56	1.51	2.79
-1.98	1.80	0.51	-0.56	1.51	2.80
-1.99	1.81	0.50	-0.55	1.50	2.81
-2.00	1.82	0.50	-0.55	1.50	2.82
Reply With Quote Multi-Quote This Message Quick reply to this message
Old 07-26-2008, 08:46 PM   #12
Ganchrow
 
Ganchrow's Avatar
Join Date: 08-28-05
Posts: 5,306
 
Default

Quote:
Originally Posted by RogueJuror View Post
Ganchrow incorporate Indonesian, Malysian, HK odds in your odds converter calc and then it'll be the complete package. I'll tout it all over asia if you do, an easy way to double the traffic. If you need the math equations just PM me.
Seems easy enough.

I'll add these in the next few days.
__________________

Reply With Quote Multi-Quote This Message Quick reply to this message
Old 07-26-2008, 09:20 PM   #13
louisvillekid
 
louisvillekid's Avatar
Join Date: 08-14-07
Posts: 4,584
 
Default

whats the math for odds like 10/11 or 9/5, how do i make that an American line?
Reply With Quote Multi-Quote This Message Quick reply to this message
Old 07-27-2008, 02:03 AM   #14
chandler1981
 
chandler1981's Avatar
Join Date: 11-18-07
Posts: 425
 
Default

LK,
just divide it and turn it into a decimal odd and then follow Gaunch's formula to make it american.
Reply With Quote Multi-Quote This Message Quick reply to this message
Old 07-27-2008, 11:34 AM   #15
louisvillekid
 
louisvillekid's Avatar
Join Date: 08-14-07
Posts: 4,584
 
Default

Quote:
Originally Posted by chandler1981 View Post
LK,
just divide it and turn it into a decimal odd and then follow Gaunch's formula to make it american.
ok, i've been meaning to make myself a little chart with the 3 different odds.
Reply With Quote Multi-Quote This Message Quick reply to this message
Old 07-27-2008, 03:28 PM   #16
Scorpion
 
Scorpion's Avatar
Join Date: 09-04-05
Posts: 1,389
 
Default

Quote:
Originally Posted by RogueJuror View Post
Ganchrow incorporate Indonesian, Malysian, HK odds in your odds converter calc and then it'll be the complete package. I'll tout it all over asia if you do, an easy way to double the traffic. If you need the math equations just PM me.


[code]Indo Odds Malay Odds HK/ Decimal
-
please post the formulas for these

I mean to convert them to US odds
Reply With Quote Multi-Quote This Message Quick reply to this message
Old 07-27-2008, 03:38 PM   #17
HedgeHog
 
HedgeHog's Avatar
Join Date: 09-11-07
Posts: 3,599
 
Default

If the damn Europeans would stick with the American measurement system, then everything would be fine. Give 'em an inch and they'll take a kilometer.
Reply With Quote Multi-Quote This Message Quick reply to this message
Old 07-27-2008, 03:47 PM   #18
durito
escarbajo negro
 
durito's Avatar
Join Date: 07-03-06
Posts: 7,586
 
Default

you can use ganch's excel tools to convert odds

Simple VBA Sports Betting Functions Template for Excel
Reply With Quote Multi-Quote This Message Quick reply to this message
Old 07-27-2008, 03:55 PM   #19
woodg8
 
woodg8's Avatar
Join Date: 06-21-08
Posts: 1,349
 
Default

American odds are possibly the most pointless odds format there is. Decimals are much more informative and easier to use. The only time I need to convert to American odds is when I post in the Best Bets threads.
Reply With Quote Multi-Quote This Message Quick reply to this message
Reply

Thread Tools
Display Modes



All times are GMT -5. The time now is 08:47 PM.


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33