Postage Calculator — Royal Mail & Courier Costs
Estimate Royal Mail postage costs by weight and parcel size for your craft items.
Weight measurement
Length measurement
Width measurement
Depth measurement
Enter the service
Adds approx. £1.50 surcharge
How We Calculate This
The calculator checks your item dimensions and weight against Royal Mail size categories: Letter, Large Letter, Small Parcel and Medium Parcel.
It then applies the approximate postage rate for the selected service class and adds a tracking surcharge if selected.
Actual prices may vary. Always check the Royal Mail website for current rates before purchasing postage.
Frequently Asked Questions
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Last updated: 2025-02-20
All calculations are estimates. Always verify quantities before purchasing materials.