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Digital Soil Dataset Pricing Utility - Grid Reference Help

How to work out a National Grid Reference

Conversion of two-letter codes to numbers

This pricing guide utility provides you with a price for the different data products which we commonly lease.

If you have a Grid Reference with two letters out the front, this is how to convert them to numbers.


EXAMPLE 1 - Letters and numbers to 6-figure (1km) grid reference

NS 306834 (This is a single point)

Split the numbers in half...

  • NS 306 834
  • 306 is the Easting, 834 is the Northing.

Look up NS in the table, below...

  • NS = 26
  • 2 is the Easting, 6 is the Northing.

Attach the number to the front of the appropriate value...

  • 2306 (Easting) 6834 (Northing)

But, you put into the soil data pricing utility only the first three values, as only 1km accuracy is required.

  • You would put 230 in the Easting field, and 683 in the Northing field.

EXAMPLE 2 - 12 figure (1 meter) grid reference to 6-figure (1km) grid reference

278456 456390 (This is another single point)

This one is easier as we only need the first three numbers from the Easting and Northing.

  • In this case 278 is the Easting, and 456 is the Northing.

OS letter codes to numbers conversion table

Number (1) Letters (1) Number (2) Letters (2) Number (3) Letters (3)
N02 HL 38 NJ 13 SG
N12 HM 48 NK 23 SH
N22 HN 7 NL 33 SJ
N32 HO 17 NM 43 SK
N42 HP 27 NN 12 SM
N01 HQ 37 NO 22 SN
N11 HR 47 NP 32 SO
N21 HS 6 NQ 42 SP
N31 HT 16 NR 1 SQ
N41 HU 26 NS 11 SR
N00 HV 36 NT 21 SS
N10 HW 46 NU 31 ST
N20 HX 15 NW 41 SU
N30 HY 25 NX 0 SV
N40 HZ 35 NY 10 SW
N52 JL 45 NZ 20 SX
N51 JQ 59 OA 30 SY
N50 JV 58 OF 40 SZ
9 NA 57 OL 54 TA
19 NB 56 OQ 64 TB
29 NC 55 OV 53 TF
39 ND 65 OW 63 TG
49 NE 14 SB 52 TL
8 NF 24 SC 62 TM
18 NG 34 SD 51 TQ
28 NH 44 SE 61 TR
        50 TV
           
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