Postage Pro UK (Apr2023 rates)

Full UK 2023 postage calculator for Royal Mail and Parcelforce (including international prices).

Postage Pro is the most popular and regularly updated postage app since 2012.

Full postage rates for letters, large letters, small parcels and packets going to the UK and overseas. Save money with advanced checking to see if your item could be sent cheaper (see screenshots for details).
Very useful for ebay / amazon / etsy sellers.
Shows the price you'd pay at the Post Office counter.
Postage Pro UK accepts item weights in grams / kg / ounces and pounds.
Other useful features:
a detailed description of each service is available
automatic switching to Parcelforce for heavier items
automatic calculation of the most efficient way to use 1st/2nd class stamps (eg. for a parcel costing £4.80, it the app will recommend using 3x1st class and 2x2nd class to get exactly £4.80 worth of stamps).
a size guide in both cm and inches
a handy shopping basket (to calculate totals, unfortunately you can't pay for postage with this app)
xmas posting dates

Check the screenshots to see this app in action.