Butter, block, 250g priced in Bitcoin: 2015 to 2024
Priced in fiat
Priced in sats
Butter, block, 250g (per 250g) cost £1.57 in 2015 and £2.14 in 2024, a change of +36% in pounds across 9 years. The figures are annual averages from ONS, RPI: Ave Price - Butter Block, per 250g (series KW9B). The fiat peak in this series came in 2023 at £2.25.
Priced in sats, the same item went from 867,403 sats to 4,091 sats, a change of −99.5%. The conversion uses the yearly average BTC price for each matching year, never a rate from a different era. The least flattering single step for the sats series was 2021 to 2022, when this item moved +87% in sats terms. Short windows can and do run against the holder; the direction across the full series is what the chart shows.
Butter is one of the fastest risers in the dataset in fiat terms, and dairy has been the stubborn core of British food inflation.
One grocery line proves nothing on its own. Repeated across the whole basket on the main page, the pattern stops looking like noise and starts looking like a property of the unit of account.
| Year | Pounds | Sats |
|---|---|---|
| 2015 | £1.57 | 867,403 |
| 2016 | £1.39 | 315,193 |
| 2017 | £1.57 | 54,914 |
| 2018 | £1.80 | 34,014 |
| 2019 | £1.77 | 30,087 |
| 2020 | £1.76 | 19,315 |
| 2021 | £1.74 | 5,008 |
| 2022 | £2.07 | 9,360 |
| 2023 | £2.25 | 9,523 |
| 2024 | £2.14 | 4,091 |
Source: ONS, RPI: Ave Price - Butter Block, per 250g (KW9B). Sats = fiat price ÷ BTC price in that currency × 100,000,000, using yearly average BTC rates. Data vintage 2026-07-04. Full method on the main page.