If like me you're fed up with queuing at the post office to send a parcel or international post, then this might come in handy!
This tool calculates which stamps you need to put on your item in order to get the postage up to the correct value such that you can simply throw your international post in any postbox, or drop your parcel off at your local sorting office (or squeeze it into a postbox!).
Simply check that the stamp prices in the boxes below are correct (they are as of April 2018), enter your target price taken from the Royal Mail price list here, and it'll tell you which stamps to put on your item!
For example, to send a 100g Large Letter to Australia (£3.45), you'd put 4 First Class and 1 Second Class Large Letter stamp on your item, then throw it into any postbox! No queuing, boom!
If you don't have a specific stamp type available, simply clear the price from the relevant box.