# Manhattan address algorithm

The Manhattan address algorithm is used to estimate the number of the closest cross street for a given building number on the island of Manhattan. The algorithm is given in any print telephone directory [1] as well as on numerous web pages and in New York City guide books.[2]

## Algorithm

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

Street/Avenue Magic number
Avenue A +3
Avenue B +3
Avenue C +3
Avenue D +3
1st Ave +3
2nd Ave +3
3rd Ave +10
4th Ave +8
6th Ave -12
8th Ave +9
9th Ave +13
10th Ave +14
11th Ave +15
Amsterdam Ave +59
Audubon Ave +165
Ave of the Americas -12
Columbus Ave +59 or +60
Convent Ave +127
Edgecombe Ave +134
Ft. Washington Ave +158
Lenox Ave +110
Lexington Ave +22
Manhattan Ave +100
Park Ave +34
Park Ave South +8
Pleasant Ave +101
St. Nicholas Ave +110
Vanderbilt Ave +42
West End Ave +59
York Ave +4

## Special cases

Some streets are special cases:

Special cases
Street name Building Number Magic number
Fifth Avenue 63–108 +11
Fifth Avenue 109–200 +13
Fifth Avenue 201–400 +16
Fifth Avenue 401–600 +18
Fifth Avenue 601–775 +20
Fifth Avenue 776–1286 divide by 10 instead of 20 and subtract 18
Fifth Avenue 1300–1500 +45
Fifth Avenue Above 2000 +24
Seventh Avenue 1–1800 +12
Seventh Avenue Above 1800 +20
Broadway 1–754 no numbered streets, south of 8th street