We build accurate, transparent, and completely free Bitcoin calculators so you can make smarter investment decisions.
Founded by @web3believers · Data from CoinGecko public API
Every decision — from data sources to how we write our guides — comes back to these principles.
Every calculator uses verified formulas and live CoinGecko data. We test results against known Bitcoin price milestones before we publish.
$1 in February 2011, $1,000 in November 2013, $19,783 in December 2017, $69,044 in November 2021, $73,098 in March 2024, $108,135 in January 2025, and ~$126,000 in October 2025.
No hidden fees, no paywalls, no mystery formulas. Every page includes a 'How It Works' section that spells out the exact math in plain language.
All calculations happen in your browser. No server logs, no cookies, no tracking. Close the tab and everything is gone.
Every tool ships with a learning guide that explains the concept. Our library of 30+ articles covers DCA, tax, mining, and on-chain analysis.
We're independent. No sponsors, no VC, no ads. Built by people who have been in Bitcoin since 2010.
We support 100+ fiat currencies, with local formatting and tax rules where applicable. Bitcoin is global; our tools are too.
Live prices stream from CoinGecko every 30s. Mining data comes from mempool.space; tax references from IRS and HMRC.
Every tool goes through a careful development and testing process before it reaches you.
Every calculator using historical Bitcoin prices pulls from the CoinGecko public API, with verified data going back to 2010. No estimates — every data point is a real market price recorded on that date.
Before we publish any calculator, we test it against known Bitcoin price milestones: $1 in February 2011, $1,000 in November 2013, $19,783 in December 2017, $69,044 in November 2021, $73,098 in March 2024, $108,135 in January 2025, and ~$126,000 in October 2025. If a calculator's output doesn't match what actually happened, it doesn't go live.
Every calculator page includes a 'How It Works' section that spells out the exact formula. You can reproduce any result on your own using the published methodology.
All calculations run entirely in your browser. No financial data is sent to any server. When you close the tab, your inputs are gone.
How we stack up against typical crypto tools on the things that actually matter.
All Bitcoin price data comes from the CoinGecko public API. Mining data from mempool.space. Tax references from IRS publications and international tax authorities. Calculations are for educational purposes only.
From early Bitcoin adoption to the most comprehensive free calculator suite on the internet.
Web3Believer gets into Bitcoin as an early adopter, before mainstream exchanges and before 'blockchain' was a common word.
The @web3believers Twitter account goes live, establishing a Bitcoin identity that is still active today.
After years of running DCA and retirement calculations in spreadsheets, the need becomes obvious: these tools should be free for everyone.
The What-If, DCA, and Retirement calculators go live, built on real historical price data.
Tax, HODL Strategy, Mining Profitability, Lightning, Power Law, Rainbow Chart, and more are added to the suite.
100+ fiat currencies, a modernized interface, 45+ professional calculators, and 30+ educational guides.
Two people who have been in this space long enough to know what Bitcoin investors actually need.
An Asia-based Bitcoin investor and multi-chain trader. In the Bitcoin ecosystem since 2010 — before most exchanges existed — and active on Twitter as @web3believers since 2011.
Web3Believer is a consistent pseudonym used since 2011, attached to a 15-year verifiable track record.
@web3believers
Financial writer, Web3 researcher, and content strategist. Writes the educational articles and 'How It Works' guides across all 45+ calculators.
@webioLive Bitcoin Price
Updated every 30 seconds
Historical BTC Price Data
Complete data back to 2010
Mining & Fee Data
Real-time hash rate and fees
Tax Reference Data
Reviewed annually
All calculations are for educational purposes only and do not constitute financial advice. Bitcoin investments carry significant risk. Past performance does not guarantee future results.
Common questions about Bitcoin Calculator Tools, our data sources, and privacy practices.
