UK Postage Calculator
Calculate postage costs for letters, parcels, and packages across the UK and internationally. Compare Royal Mail and courier services to find the best rates.
Your Postage Costs
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How to Use This Postage Calculator
Getting an accurate postage quote is straightforward. Start by selecting what you’re sending – whether it’s a standard letter, large letter, or parcel. Then enter the weight in grams and choose your destination.
The calculator automatically compares First and Second Class options, showing you delivery timeframes and costs. For parcels, you’ll also see courier alternatives that might save you money.
What Makes a Letter vs a Large Letter?
Up to 100g
Up to 750g
Up to 2kg
Up to 20kg
Postage Pricing Explained
Royal Mail uses a straightforward pricing structure based on size, weight, and speed. First Class typically arrives the next working day, whilst Second Class takes 2-3 working days but costs less.
Why Do Prices Vary?
Several factors affect your postage cost. Heavier items naturally cost more, as do larger packages that take up more space in delivery vehicles. International shipping adds customs processing and longer transport routes.
First Class mail gets priority sorting and dedicated transport, which explains the premium. Second Class shares space with bulk mail, reducing costs but extending delivery times.
Signed For and Special Delivery
Standard services don’t include tracking. If you’re sending valuables, consider Signed For services that provide proof of delivery. Special Delivery guarantees next-day arrival by 1pm with compensation cover up to £2,500.
| Service | Delivery Time | Tracking | Compensation |
|---|---|---|---|
| First Class | 1 working day | No | £20 |
| Second Class | 2-3 working days | No | £20 |
| Signed For | 1-2 working days | Yes | £50 |
| Special Delivery | Next day by 1pm | Yes | Up to £2,500 |
Royal Mail vs Courier Services
Whilst Royal Mail remains the traditional choice, courier services like Evri, DPD, and UPS often offer competitive rates for parcels. These companies specialise in larger packages and frequently cost less for items over 2kg.
When to Choose a Courier
Couriers shine for heavier parcels. A 5kg package might cost £9.35 via Royal Mail First Class, but courier services can start from £6-£7. You’ll also get tracking as standard and convenient drop-off points at local shops.
However, Royal Mail integrates better with letterboxes for smaller items. Letters and large letters that fit through the slot don’t require anyone home to receive them.
Collection or Drop-Off?
Most courier services offer free collection from your home if you book online. Alternatively, thousands of local shops serve as drop-off points. Royal Mail provides similar flexibility with Post Office branches and postboxes nationwide.
International Postage Zones
Sending items abroad? Royal Mail divides the world into zones, each with different pricing. Europe remains the cheapest international option, whilst distant destinations like Australia cost more.
The Zone System
Europe: Covers all EU countries plus nearby nations like Switzerland and Norway. Delivery typically takes 3-5 working days.
World Zone 1: Includes Canada, parts of the Middle East, and South Asia. Expect 5-7 working days.
World Zone 2: Covers Australia, New Zealand, and East Asia. Allow 6-8 working days.
World Zone 3: Exclusively for the USA, with delivery in 5-7 working days.
Common Questions Answered
What happens if I underestimate the weight?
Royal Mail weighs all items during processing. If yours is heavier than the postage paid, they’ll either return it to you or deliver it with a fee for the recipient to pay. Always round up when unsure.
Can I get cheaper rates buying online?
Yes! Postage bought online typically costs 10-20% less than counter prices. Royal Mail Click & Drop offers discounted rates, and courier comparison sites can save even more.
Do I need to pay extra for Saturdays?
First Class and Special Delivery include Saturday delivery at no extra cost. Second Class operates Monday to Friday only. Some courier services charge premiums for weekend delivery.
What if my parcel is refused or undelivered?
UK items return to you free of charge after failed delivery attempts. International parcels may incur return postage costs. Choose Signed For services if delivery confirmation matters.
Are there items I cannot send?
Prohibited items include aerosols, lithium batteries (standalone), liquids in glass, and anything flammable or toxic. Restricted items like perfumes need special handling. Check Royal Mail’s prohibited items list before posting.
How much does packaging affect cost?
Packaging weight counts towards your total. A sturdy box might add 50-200g. Use the lightest adequate packaging to avoid jumping into the next weight band.
Can I split one order into multiple packages to save money?
Sometimes this works. Two 1kg parcels cost less than one 2kg parcel for certain size categories. However, you’ll double your packing materials and effort. Calculate both options.
Do Christmas and bank holidays affect delivery times?
Yes, significantly. During December, add 2-3 days to normal delivery times. Royal Mail publishes last posting dates each year – typically mid-December for guaranteed Christmas delivery.
Money-Saving Strategies
Smart senders can cut postage costs substantially. Here’s how to pay less without compromising on service.
Timing Your Shipments
Need it there fast? First Class makes sense. But for non-urgent items, Second Class saves 30-40%. Planning ahead means choosing the economical option more often.
Packaging Optimisation
Shrinking your package dimensions can drop you into a cheaper category. A medium parcel that squeezes into small parcel dimensions saves £2-3 per item. Bubble mailers weigh less than boxes for soft goods.
Comparison Shopping
Never assume Royal Mail offers the best price. Courier comparison sites show multiple carriers’ rates instantly. For parcels over 2kg, you’ll frequently find courier services 20-40% cheaper.
Account Discounts
Regular shippers benefit from business accounts. Royal Mail offers Click & Drop for free with discounted rates. Couriers provide business accounts with volume discounts once you ship 10+ parcels monthly.
| Weight | Royal Mail First | Royal Mail Second | Courier Average | Best Value |
|---|---|---|---|---|
| Up to 1kg | £5.09 | £4.99 | £3.50-£4.50 | Courier |
| 1-2kg | £7.45 | £7.19 | £4.50-£5.50 | Courier |
| 2-5kg | £9.35 | £8.99 | £5.50-£7.00 | Courier |
| 5-10kg | £9.35 | £8.99 | £6.50-£8.00 | Courier |
Packaging Guidelines
Proper packaging prevents damage and disputes. Royal Mail may refuse compensation if packaging proves inadequate.
Minimum Standards
Use new or like-new boxes without tears or previous labels. Bubble wrap fragile items with at least 5cm cushioning on all sides. Seal with strong packing tape – not sellotape or string.
Addressing Correctly
Write addresses clearly in permanent ink. Include postcodes prominently. For international items, write the destination country in capital letters on the bottom line.
Avoid covering barcodes or putting tape over addresses. These cause scanning failures and delays.
Special Items
Liquids need leak-proof containers inside sealed plastic bags. Powders require similar double-containment. Mark boxes “FRAGILE” when appropriate, though this doesn’t guarantee special handling.
Price Change History
Royal Mail adjusts prices annually, typically in April and October. Recent years have seen significant increases due to declining letter volumes and rising delivery costs.
2025 Changes
April 2025 brought increases averaging 3-7% across most services. First Class stamps rose from £1.65 to £1.70, whilst large letters saw steeper jumps of up to 22% in some weight bands.
October 2025 introduced further adjustments to business rates, affecting franked mail more than stamps.
Why Prices Keep Rising
Letter volumes have halved since 2010 as email replaces physical mail. With fewer letters to subsidise the network, parcel prices must cover more infrastructure costs. Labour and fuel expenses also contribute.
References
Royal Mail Group Ltd. (2025). Current Postage Prices. Royal Mail. Available at: https://www.royalmail.com/current-postage-prices
Royal Mail Group Ltd. (2025). Prices 2025. Royal Mail. Available at: https://www.royalmail.com/prices2025
PostGrid UK. (2025). Royal Mail UK Postage Rates 2025. Available at: https://www.postgrid.co.uk/uk-postage-rates/
Postal Packaging. (2025). Royal Mail Postage Rate Changes 2025: Full UK Guide. Available at: https://www.postalpackaging.com/blogs/news/royal-mail-2025-price-increases