Bananas, per kg priced in Bitcoin: 2015 to 2024
Priced in fiat
Priced in sats
Bananas, per kg (per kg) cost £0.86 in 2015 and £1.03 in 2024, a change of +20% in pounds across 9 years. The figures are annual averages from ONS, RPI: Ave price - Bananas, per Kg, (series CZMV). The fiat peak in this series came in 2023 at £1.09.
Priced in sats, the same item went from 475,138 sats to 1,969 sats, a change of −99.6%. 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 +77% in sats terms. Short windows can and do run against the holder; the direction across the full series is what the chart shows.
The famous outlier. Bananas are one of the most price-stable items in the British basket, which makes their collapse in sats terms the cleanest possible demonstration of the measuring stick argument.
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 | £0.86 | 475,138 |
| 2016 | £0.85 | 192,744 |
| 2017 | £0.90 | 31,480 |
| 2018 | £0.93 | 17,574 |
| 2019 | £0.95 | 16,148 |
| 2020 | £0.87 | 9,548 |
| 2021 | £0.80 | 2,302 |
| 2022 | £0.90 | 4,070 |
| 2023 | £1.09 | 4,614 |
| 2024 | £1.03 | 1,969 |
Source: ONS, RPI: Ave price - Bananas, per Kg, (CZMV). 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.