NYC Street Finder
The following chart is a New York City travel survival tool. Drop the last figure of the address you are looking to find, divide by 2, and add or subtract according to the chart below. The answer is the nearest numbered cross street. (This formula does not apply to Broadway below 8th Street because of the many streets with names instead of numbers).

For example, use the address for NYC & Company's Official Visitor Information Center - 810 Seventh Avenue:
Drop the 0 and you have 81
Divide by 2 and get 40.5
Add 12 (according to chart)
40.5 + 12 = 52.5
The Official Visitor Information Center is located between 52nd and 53rd Street on 7th Avenue.

AVENUE
ADJUSTMENT
Drop the last figure of the address you are looking to find, divide by 2, and add or subtract according to the chart below. The answer is the nearest numbered cross street. (This formula does not apply to Broadway below 8th Street because of the many streets with names instead of numbers).

Aves. A,B,C, or D
Add 3

1st and 2nd Aves.
Add 3

3rd Ave.
Add 10

4th Ave.
Add 8

5th Avenue ...

- Up to 200
Add 13

- Up to 400
Add 16

- Up to 600
Add 18

- Up to 775
Add 20

- 775 to 1286
Drop last figure and subtract 18

- Up to 1500
Add 45

- Up to 2000
Add 24

Ave. of the Americas
Subtract 12

7th Avenue ...

- Up to 1800
Add 12

- Above 1800
Add 20

8th Ave.
Add 10

9th Ave.
Add 13

10th Ave.
Add 14

Amsterdam Ave.
Add 60

Audubon Ave.
Add 165

Broadway ...

...754 to 858
Subtract 29

...858 to 958
Subtract 25

...Above 958
Subtract 30

Columbus Ave.
Add 60

Convent Ave.
Add 127

Central Park West
Divide street number by 10 and add 60

Edgecombe Ave.
Add 134

Ft. Washington Ave.
Add 158

Lenox Ave.
Add 110

Lexington Ave.
Add 22

Madison Ave.
Add 26

Manhattan Ave.
Add 100

Park Ave.
Add 35

Pleasant Ave.
Add 101

Riverside Drive
Divide house number by 10 and add 72, up to 165 St.

St. Nicholas Ave.
Add 110

Wadsworth Ave.
Add 173

West End Ave.
Add 60

http://www.nycvisit.com/content/index.cfm?pagePkey=684