Skip to main content
bitcoin47.com
— BTC —

₿ BITCOIN47.COM

Bitcoin Tools & Calculators

Free Bitcoin calculators and reference tools. All computation runs in your browser — no data is sent anywhere.

⚡ Sat Converter 📈 DCA Calc ⏳ Halving 🧠 Fear & Greed 🎯 Quiz
⚡

Satoshi Converter

Convert between Bitcoin, satoshis, and US dollars. Uses live BTC price from CoinGecko.

1 BTC = 100,000,000 sats
Smallest Bitcoin unit
Loading BTC price…
Quick Conversions:

Live price from CoinGecko API. Refreshes automatically every 60 seconds. Not investment advice.

📈

Bitcoin DCA Calculator

Estimate what dollar-cost averaging into Bitcoin would have returned. Uses approximate historical price data.

$
—Total invested
—BTC accumulated
—Est. current value
—Return
Amount invested Current value

Historical price data is approximate. Past performance does not predict future results. Not investment advice.

⏳

Next Halving Countdown

Live block height and estimated time until Bitcoin's 5th halving (~April 2028). Data from mempool.space.

Loading… Current block height
— Blocks until halving
— Estimated days remaining
1.5625 BTC Next block reward (from 3.125)
Halving 4 — April 2024
Block 840,000 Halving 5 — ~April 2028
Block 1,050,000
—% of this halving cycle complete

Halving History

GenesisBlock 0 — Jan 200950 BTC / block
Halving 1Block 210,000 — Nov 201225 BTC / block
Halving 2Block 420,000 — Jul 201612.5 BTC / block
Halving 3Block 630,000 — May 20206.25 BTC / block
Halving 4 ✓Block 840,000 — Apr 20243.125 BTC / block
Halving 5 ⏳Block 1,050,000 — ~Apr 20281.5625 BTC / block

Block data from mempool.space public API. Block times average ~10 min but vary. Halving date is an estimate.

🧠

Bitcoin Fear & Greed Index

Market sentiment indicator. 0 = Extreme Fear, 100 = Extreme Greed. Historically, extreme fear = buy signal; extreme greed = caution.

Extreme
Fear Neutral Extreme
Greed
Loading…

7-Day History

Loading sentiment data…

How to use this indicator

Extreme Fear (0–25): Market panic. Historically associated with cycle bottoms. "Be greedy when others are fearful."

Fear (26–46): Bearish sentiment. Often a period of accumulation for long-term holders.

Neutral (47–54): No strong directional sentiment. Price consolidation periods.

Greed (55–75): Bullish sentiment. Monitor for overextension.

Extreme Greed (76–100): Euphoria. Historically associated with cycle tops. A warning indicator, not a sell signal.

Data from alternative.me Fear & Greed API. Updated daily. This is a sentiment indicator — not investment advice.

🎯

Bitcoin Knowledge Quiz

10 questions across beginner, intermediate, and advanced levels. Test your Bitcoin knowledge.

10 questions · Beginner to advanced · See your score instantly