Full UK 2019 postage calculator for Royal Mail and Parcelforce (including franked and international prices).

Rates correct for March 2019, with an option to show postage prices from before and after the 25th March 2019 price change.

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.
Includes the price you'd pay at the Post Office counter, and the Royal Mail franked tariff.
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 £15.85, use 15x1st class and 10x2nd class)
a size guide in both cm and inches
a handy shopping basket
xmas posting dates

Check the screenshots to see this app in action.