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What is old money worth today?

£435.61

£100.00 in 1985 has the buying power of £435.61 in 2026.

See what money actually bought in 1985

How this is computed

Conversions use annual averages of the United Kingdom's headline price index (Office for National Statistics), the same series behind every estimate on this site. The current year is the average of the months published so far. This measures general purchasing power: individual items drift from the average — which is exactly what the rest of ThenPrice documents, item by item.

Deep history is less certain. The long-run index reaches back to 1800, but the further past 1914 a conversion goes, the more it depends on spliced historical estimates rather than a modern survey.

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Verified prices are drawn from U.S. public records (BLS/FRED, public domain). Estimated prices are inflation-derived and labeled as such.
© 2026 ThenPrice — a wholly owned subsidiary of Cien Rios LLC.