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Manhattan address algorithm

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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 a divisor (generally 20) and add (or subtract) the "magic number" from the table below:

Street/Avenue Building Number Divisor Magic number
Avenue A All ÷20 +3
Avenue B All ÷20 +3
Avenue C All ÷20 +3
Avenue D All ÷20 +3
1st Ave All ÷20 +3
2nd Ave All ÷20 +3
3rd Ave All ÷20 +10
4th Ave All ÷20 +8
5th Avenue 63–108 ÷20 +11
5th Avenue 109–200 ÷20 +13
5th Avenue 201–400 ÷20 +16
5th Avenue 401–600 ÷20 +18
5th Avenue 601–775 ÷20 +20
5th Avenue 776–1286 ÷10 -18
5th Avenue 1300–1500 ÷20 +45
5th Avenue Above 2000 ÷20 +24
6th Ave All ÷20 -12
7th Avenue 1–1800 ÷20 +12
7th Avenue Above 1800 ÷20 +20
8th Ave All ÷20 +9
9th Ave All ÷20 +13
10th Ave All ÷20 +14
11th Ave All ÷20 +15
Amsterdam Ave All ÷20 +59
Audubon Ave All ÷20 +165
Ave of the Americas All ÷20 -12
Columbus Ave All ÷20 +59 or +60[clarification needed]
Broadway 1–754 (no numbered streets, south of 8th street)
Broadway 756–846 ÷20 -29
Broadway 847–953 ÷20 -25
Broadway Above 953 ÷20 -31
Central Park West All ÷10 +60
Convent Ave All ÷20 +127
Edgecombe Ave All ÷20 +134
Ft. Washington Ave All ÷20 +158
Lenox Ave All ÷20 +110
Lexington Ave All ÷20 +22
Madison Ave All ÷20 +27
Manhattan Ave All ÷20 +100
Park Ave All ÷20 +34
Park Ave South All ÷20 +8
Pleasant Ave All ÷20 +101
Riverside Drive 1–567 ÷10 +72
Riverside Drive Above 567 ÷10 +78
St. Nicholas Ave All ÷20 +110
Vanderbilt Ave All ÷20 +42
Wadsworth Ave All ÷20 +173
West End Ave All ÷20 +59
York Ave All ÷20 +4

See also

References