Bitcoin tools
Every free BitcoinSaving tool in one place. The saving and comparison tools replay real plans on real daily prices back to 2010. The converters answer quick questions at the current price. The retirement tools at the bottom are shipping one by one.
1 BTC = $73,684
Latest daily close in our price series, 2026-11-11. That is about 1,357 sats per dollar. Prices: daily BTC/USD closes, Coinbase via btcdollarcostaverage.com.
Live now
DCA Simulator
Replay a regular Bitcoin buying plan on daily prices back to 2010, with a chart, year by year results and a comparison with gold, the S&P 500, NVIDIA or MSCI World.
DCA Calculator
The plain form version: enter an amount, a rhythm and a start year, and get total invested, Bitcoin stacked, average cost and a year by year table.
Lump Sum vs DCA
One big purchase or many small ones? The same money replayed both ways on real daily prices, for any start year you pick.
What 1 BTC Buys
One bitcoin measured in things, not dollars: gold, houses, groceries, fuel and wages. Pick any day since 2010 and the whole board reprices to that day.
Sats Converter
Convert satoshis to Bitcoin and to dollars at the current price. One bitcoin is 100,000,000 sats.
BTC to USD Converter
Convert any Bitcoin amount to US dollars and euros at the current price, and dollars back to Bitcoin and sats.
Fee Calculator
What exchange fees really cost a regular buying plan: fees paid, Bitcoin lost, and value lost at 0% to 3% per buy.
DCA Replays
Famous saving plans replayed on real prices: a fixed weekly amount from a chosen year, with every purchase, total invested and value today.
Coming soon
These tools are being built one at a time and added to this page as each one ships. The retirement set at the end covers US rules for large holders.
Power Law Model Coming soon
The Santostasi power law fitted to the full Bitcoin daily close series, with the fair value line, the 50% and 200% bands, and a date to model price lookup.
Home Price in Bitcoin Coming soon
The US median home price expressed in Bitcoin by year, as a chart and a table, with a year lookup.
Bitcoin vs S&P 500 Coming soon
Growth of $100, or an amount you choose, in Bitcoin vs the S&P 500 from a start year you pick.
Reverse CAGR Projector Coming soon
Current holdings or a lump sum, an assumed growth rate and a time horizon, turned into a projected value table. A projection of assumptions, not a prediction.
On This Day in Bitcoin Coming soon
The Bitcoin price on this date in every past year, plus the notable events that happened on it.
Loan vs Sell Coming soon
Borrow against Bitcoin, with loan to value, interest and term, against selling and paying capital gains: the two outcomes side by side.
Bitcoin vs Mortgage Payoff Coming soon
An extra monthly amount sent to the mortgage, or stacked into Bitcoin instead: a historical replay mode and an assumption mode.
Infinite Banking Coming soon
The policy loan concept for Bitcoin holders, explained in plain words, with a calculator.
Bitcoin Inheritance Calculator Coming soon
A stack, the holders and heirs, and a time horizon, turned into a per heir projection under stated assumptions.
Bitcoin Retirement Calculator Coming soon
Current age, retirement age, current stack, monthly stacking and spending in retirement, with a Power Law percentile selector.
Tax-Aware Retirement Coming soon
US account sequencing across taxable, traditional IRA and Roth accounts, cost basis, current federal long term capital gains brackets and the age 59.5 rule.
How the tools work
- Real prices, not assumptions. Saving, comparison and replay tools run on daily Bitcoin closing prices from 18 August 2010 to the latest close in the series.
- Your numbers, your device. Nothing you type leaves your browser. There is no account and no sign up.
- Assumptions are labelled. Projector tools, such as the reverse CAGR projector, ask you to pick a growth rate and a horizon, and they say plainly that the result is a projection of those assumptions, not a prediction.
- Rules carry their year. The retirement and tax tools label each rule with the year it applies to and cite the IRS source, because tax rules change.
Sources
- Bitcoin daily closes: Coinbase via btcdollarcostaverage.com
- US median home price and other economic series: FRED, Federal Reserve Bank of St. Louis
- US consumer prices: US Bureau of Labor Statistics
- US tax rules on the retirement tools: Internal Revenue Service
Questions
Are the BitcoinSaving tools free?
Yes. Every tool on this page is free to use, with no account and no sign up. The replays run on real historical prices, so you see past outcomes instead of a sales pitch.
Do the tools use real prices or assumptions?
The saving, comparison and replay tools use real daily Bitcoin closing prices back to 18 August 2010. Only the projector tools use assumptions, and each one labels them as assumptions, not predictions.
Do the tools include fees or taxes?
The replays use raw closing prices with no exchange fees, no spread and no taxes, unless the tool says otherwise. The fee calculator exists to show what fees add, and the loan and tax tools state their own assumptions on the page.
Which tool should I start with?
Start with the DCA simulator if you want the picture, or the DCA calculator if you want the table. Both replay the same kind of plan on the same prices. The converters answer quick questions, and What 1 BTC Buys shows what a whole bitcoin means in everyday things.
Is this financial advice?
No. Every tool is education only, not financial advice. Past performance does not predict future results, and the retirement and tax tools explain US rules as general information, not personal advice.
Education only, not financial advice. Past performance does not predict future results.