21Relay utility

Sats Purchasing-Power Calculator

Compare how many sats a manually priced everyday item or consumer basket cost on a historical date and today.

Detail level

Guided mode keeps the decision focused. Advanced mode reveals extra assumptions.

Keep in mind: You provide the historical and current item prices so 21Relay does not invent or silently mix regional consumer-price datasets.

Purchasing-power inputs

Item or basketCurrencyHistorical dateItem price on that dateItem price today

Enter item prices and load the historical Bitcoin observation.

Methodology, data and limits

You provide the historical and current item prices so 21Relay does not invent or silently mix regional consumer-price datasets.
Historical Bitcoin data uses the first available observation near the selected date; retail prices, spreads and fees are excluded.
Examples are educational comparisons and do not predict Bitcoin's future purchasing power.

Related utilities

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Model regular historical Bitcoin purchases using daily market data.

Legacy route for the combined subsidy, issuance and halving explorer.

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21Relay utilities are educational planning tools, not financial, tax or investment advice. Verify important decisions independently.