24 July 2025
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The celebration of Sir Isaac Newton's birth was marked with a special release of an intricately designed 50p coin. But what is this fantastic coin now worth?
The Royal Mint released the Sir Isaac Newton 50p in 2017. The coin commemorates the 375th anniversary of the scientist's birth. Recently ranking the second rarest 50p in circulation (behind the kew gardens 50p), how much is your Newton coin worth?
The Value of Sir Isaac Newton 50p
Released in circulation and brilliant uncirculated, this 50p is the only official UK coin to celebrate Isaac Newton. It has a mintage figure of 1.8 million. The incredible scientist is one of the most famous figures to ever hold the role of Master of the Mint.
Aaron West created the intricate reverse design. Aaron West based the design on the elements of Proposition 11 from Book One of Newton’s Principia Mathematica.
Right now, the value is not as high as many expect. Because even though it is considered a rare 50p coin, it is still considered a relatively new coin. Currently in the pockets of many unsuspected members of the public as loose change.
The circulated coin is currently worth around £2.50 and the brilliant uncirculated 50p is worth around £6.
Photo Credit: The Royal Mint
2018 Strike Your Own
In 2018, The Royal Mint Experience released their Sir Isaac Newton 50p for their Strike Your Own Experience.
The Royal Mint introduced The Royal Mint Experience in 2016. Opened in 2016 in South Wales, every visitor had the opportunity to strike their own coin as part of the tour. The Isaac Newton 50p is not the coin they have done this experience with. Currently you can go and get your Royal Observatory £2 coin struck on the tour.
Suggested Article: Celebrate 350 years of the Royal Observatory!
It costs £7.95 per coin, however, the value of these strike your owns often tend to be higher than their original counterpart.
This is the only way to have the 50p dated with 2018. The Royal Mint produces the Brilliant Uncirculated Coin in cupronickel, and it is worth around £25.
Photo credit: Britannia Company
Sir Isaac Newton 50p error
Some coin collectors noticed that there is a rare Sir Isaac Newton 50p coin error. The reverse design appears to look normal but there are several extra lines across Queen Elizabeth II portrait. This is an error during the striking process called a die clash.
Nobody knows how many of these are currently out there but if found could make the lucky finder 100 times the face value. This makes the 50p even more collectible, so get looking you may have one in your pocket right now!
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