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 as well as on numerous web pages and in New York City guide books.

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 No.	Divisor	Magic No.	(result)
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 Ave	63–108	÷20	+11	14.15–16.4
5th Ave	109–200	÷20	+13	18.45–23
5th Ave	201–400	÷20	+16	26.05–36
5th Ave	401–600	÷20	+18	38.05–48
5th Ave	601–775	÷20	+20	50.05–58.75
5th Ave	776–1286	÷10	-18	59.6–110.6
5th Ave	1300–1500	÷20	+45	110–120
5th Ave	Above 2000	÷20	+24	124+
6th Ave	All	÷20	-12
7th Ave	1–1800	÷20	+12	12.05–102
7th Ave	Above 1800	÷20	+20	110+
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	+60
Broadway	1–754	(no numbered streets south of 8th)
Broadway	756–846	÷20	-29	8.8–13.3
Broadway	847–953	÷20	-25	17.35–22.65
Broadway	Above 953	÷20	-31	16.65+)
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	72.05–100.35
Riverside Drive	Above 567	÷10	+78	106.35+
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

• List of streets in Manhattan
• Numbered street