The Manhattan address algorithm refers to the formulas used to estimate the closest east–west cross street for building numbers on north–south avenues in the New York City borough of Manhattan.

## Algorithm

To find the approximate number of the closest cross street, divide the building number by a divisor (generally 20) and add (or subtract) the "tricky number" from the table below:

Street/Avenue Building No.  Divisor Tricky No.  (unrounded result)
Avenue A All $\div 20$ $+3$ Avenue B All $\div 20$ $+3$ Avenue C All $\div 20$ $+3$ Avenue D All $\div 20$ $+3$ 1st Avenue All $\div 20$ $+3$ 2nd Avenue All $\div 20$ $+3$ 3rd Avenue All $\div 20$ $+10$ 4th Avenue All $\div 20$ $+8$ 5th Avenue 63–108 $\div 20$ $+11$ 14.15–16.4
5th Avenue 109–199 $\div 20$ $+13$ 18.45–23
5th Avenue 200–399 $\div 20$ $+16$ 26.05–36
5th Avenue 400–599 $\div 20$ $+18$ 38.05–48
5th Avenue 600–774 $\div 20$ $+20$ 50.05–58.75
5th Avenue 775–1286 $\div 10$ $-18$ 59.6–110.6
5th Avenue 1287–1499 $\div 20$ $+45$ 110–120
5th Avenue Above 1500 $\div 20$ $+24$ 124+
6th Avenue All $\div 20$ $-12$ 7th Avenue 1–1800 $\div 20$ $+12$ 12.05–102
7th Avenue Above 1800 $\div 20$ $+20$ 110+
8th Avenue All $\div 20$ $+9$ 9th Avenue All $\div 20$ $+13$ 10th Avenue All $\div 20$ $+14$ 11th Avenue All $\div 20$ $+15$ Amsterdam Avenue All $\div 20$ $+59$ Audubon Avenue All $\div 20$ $+165$ Avenue of the Americas All $\div 20$ $-12$ Columbus Avenue All $\div 20$ $+60$ Broadway 1–754 (few numbered streets south of 8th)
Broadway 756–846 $\div 20$ $-29$ 8.8–13.3
Broadway 847–953 $\div 20$ $-25$ 17.35–22.65
Broadway Above 953 $\div 20$ $-31$ 16.65+
Central Park West All $\div 10$ $+60$ Convent Avenue All $\div 20$ $+127$ East End Avenue All $\div 20$ $+79$ Edgecombe Avenue All $\div 20$ $+134$ Ft. Washington Avenue All $\div 20$ $+158$ Lenox Avenue All $\div 20$ $+110$ Lexington Avenue All $\div 20$ $+22$ Madison Avenue All $\div 20$ $+27$ Manhattan Avenue All $\div 20$ $+100$ Park Avenue All $\div 20$ $+34$ Park Avenue South All $\div 20$ $+8$ Pleasant Avenue All $\div 20$ $+101$ Riverside Drive 1–567 $\div 10$ $+72$ 72.1–128.7
Riverside Drive Above 567 $\div 10$ $+78$ 134.7+
St. Nicholas Avenue All $\div 20$ $+110$ Vanderbilt Avenue All $\div 20$ $+42$ Wadsworth Avenue All $\div 20$ $+173$ West End Avenue All $\div 20$ $+59$ York Avenue All $\div 20$ $+4$ 