Stampulator - the Stamp Calculator This page calculates combinations of stamps needed to reach or exceed the value required for large or heavy items. Read my blog about why I created this here and you can also get in touch with me by commenting on that blog page

Which stamps do you have?

By default, it's assumed you have the standard UK 1st (76p), 2nd (65p), Large 1st (£1.15p) and Large 2nd (88p) which are are the March 2020 prices from Royal Mail (link also includes size and weight limits). Alternatively, enter the values of the stamps you have here and press submit. If you don't need all 4 values use a high number like 9999 so it won't be suggested in the calculation. If you'd like a page for a different country or values comment on my blog and I'll see what I can do.


Known limitations: Can only use up to 9 of each type of stamp (thus 36 stamps in total)

Your target values 117

UK Standard Services

Size Weight First Class Second Class
Letter 100g 76 65
Large Letter 100g 115 88
250g 164 140
500g 214 183
750g 295 248
Small Parcel 1kg 370 310
2kg 557 310
Medium Parcel 1kg 590 520
2kg 902 520
5kg 1585 899
10kg 210 2025
20kg 3340 2855

UK Signed for

Size Weight (up to and including) First Class Second Class
Letter 100g 206 195
Large Letter 100g 245 218
250g 294 270
500g 344 313
750g 425 378
Small Parcel 1kg 470 410
2kg 657 410
Medium Parcel 1kg 690 620
2kg 1002 620
5kg 1685 999
10kg 2290 2125
20kg 3440 2955