You can do up to a 10 teamer with this calculator:
http://sportsgambling.about.com/blcalc.htm
If betting on a favorite, find the conversion below (note that some (many) places don't go to as many places after the decimal point in order to give a lessor payoff)
If betting on an underdog, take the price and add 100 to the line.
Two team parlay example:
Mets -130 to Cubs +115
100 (Amount Bet) x 1.769 (Mets, look up -130 below and find 1.769) x 2.15 (Cubs) = 380.35
380.35 -100 (Amount bet) = 280.35
Note that most places will round down to 280, possibly less if they were only using 2 places after the decimal. For example, using 1.76 instead of 1.769 for the Mets gives a final result of 278.40, which would be rounded to 278.
Conversion chart for favorites
The actual formula to figure out the conversion is (100 / line) + 1.00, but I find that most people prefer to just refer to a chart.
But, so that you know, this formula is what is used to get the decimal odds on a favorite.
For example, for a line of -127
(100 / 127) + 1.00 = 1.787
101 = 1.990 130 = 1.769 159 = 1.628 188 = 1.531
102 = 1.980 131 = 1.763 160 = 1.625 189 = 1.529
103 = 1.970 132 = 1.757 161 = 1.621 190 = 1.526
104 = 1.961 133 = 1.751 162 = 1.617 191 = 1.523
105 = 1.952 134 = 1.746 163 = 1.613 192 = 1.520
106 = 1.943 135 = 1.740 164 = 1.609 193 = 1.518
107 = 1.934 136 = 1.735 165 = 1.606 195 = 1.512
108 = 1.925 137 = 1.729 166 = 1.602 200 = 1.500
109 = 1.917 138 = 1.724 167 = 1.598 205 = 1.487
110 = 1.909 139 = 1.719 168 = 1.595 210 = 1.476
111 = 1.900 140 = 1.714 169 = 1.591 215 = 1.465
112 = 1.892 141 = 1.709 170 = 1.588 220 = 1.454
113 = 1.884 142 = 1.704 171 = 1.584 225 = 1.444
114 = 1.877 143 = 1.699 172 = 1.581 230 = 1.434
115 = 1.869 144 = 1.694 173 = 1.578 235 = 1.425
116 = 1.862 145 = 1.689 174 = 1.574 240 = 1.416
117 = 1.854 146 = 1.684 175 = 1.571 245 = 1.408
118 = 1.847 147 = 1.680 176 = 1.568 250 = 1.400
119 = 1.840 148 = 1.675 177 = 1.564 255 = 1.392
120 = 1.833 149 = 1.671 178 = 1.561 260 = 1.384
121 = 1.826 150 = 1.666 179 = 1.558 265 = 1.377
122 = 1.819 151 = 1.662 180 = 1.555 270 = 1.370
123 = 1.813 152 = 1.657 181 = 1.552 275 = 1.363
124 = 1.806 153 = 1.653 182 = 1.549 280 = 1.357
125 = 1.800 154 = 1.649 183 = 1.546 285 = 1.350
126 = 1.793 155 = 1.645 184 = 1.543 290 = 1.344
127 = 1.787 156 = 1.641 185 = 1.540 295 = 1.338
128 = 1.781 157 = 1.636 186 = 1.537 300 = 1.333
129 = 1.775 158 = 1.632 187 = 1.534 305 = 1.327
For underdogs, just add 100 to the line and divide by 100.
EVEN = 2.00 (100 + 100) / 100
+101 = 2.01 (101 + 100) / 100
+102 = 2.02 (102 + 100) / 100
etc.
Good Luck,
Bart
[This message was edited by qs185 on June 03, 2003 at 09:08 AM.]