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Crypto unit converter

Convert between Bitcoin denominations (BTC, mBTC, bits, satoshi) and Ethereum denominations (ETH, gwei, wei), exact to the last digit with big-integer arithmetic — no floating-point rounding even at 18 decimals.

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Crypto unit converter is free to use as often as you like, directly from this page. It covers BTC, mBTC, bits, satoshi — adjust any of them and the result follows immediately.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What does Crypto unit converter do?

Convert between Bitcoin denominations (BTC, mBTC, bits, satoshi) and Ethereum denominations (ETH, gwei, wei), exact to the last digit with big-integer arithmetic — no floating-point rounding even at 18 decimals.

What does a concrete case look like?

1 BTC = 1 000 mBTC = 1 000 000 bits = 100 000 000 satoshi — the tool shows every step in between, not just the final figure.

What does it take into account?

It factors in BTC, mBTC, bits, satoshi. Change any of them and the output follows immediately.

When would I actually use this?

Comparing two investments that pay at different times, deciding whether a project clears its cost of capital, and sanity-checking a valuation someone else produced.

What is the most common mistake?

Trusting a valuation without asking what share of it comes from the terminal value. Past 70%, the answer is an assumption about the distant future dressed up as a calculation.

How is Crypto unit converter different from Crypto DCA calculator?

They sit next to each other but answer different questions: Crypto DCA calculator is the one to open when you need it to dollar-cost averaging: enter your fixed buy amount and the prices you bought at, and get coins accumulated, true average cost, current value and profit/loss. Break-even is your average cost — you are ahead the moment price passes it. Pick whichever matches what you're starting from — both are free.

Is there a tool for the next step?

Crypto invoice / payment QR generator is the closest one after this: Turn your own receiving address plus an amount, label and message into a standard payment link (BIP-21 for Bitcoin) and a scannable QR code. The address is checksum-verified as you type, and no key is ever generated: you supply your own receiving address.

What else is worth having open alongside it?

Crypto lending / borrowing calculator and Crypto market cap calculator — they come up in the same task often enough to be worth a second tab.

Where do the figures come from?

Discounting, IRR and payback are defined identically everywhere, so the arithmetic is not in dispute — the assumptions you feed it are. Change the discount rate by a point and re-read the answer.

Further reading

All guides →
ExplainerWhat Is Slippage in Crypto? Price Impact, Tolerance and What It CostsPrice impact is arithmetic: on a constant-product pool it equals your trade size divided by the reserve plus your trade. Here is the formula, a table of trade size against impact, and why the setting called slippage tolerance changes none of it.ComparisonCrypto Market Cap vs Trading Volume: What Each Number Can and Cannot Tell YouMarket cap is price times circulating supply — an arithmetic product, not money invested. Volume is what actually changed hands. Here is what each measures, how their ratio exposes a thin market, and where fully diluted valuation fits.GuideYield Farming: What an Advertised APY Actually PaysThe number on the farm's front page is a gross figure before every subtraction. Here is a 120 percent APY walked down, one layer at a time, to the 33.6 percent that actually landed — plus why APR and APY are not the same number.ExplainerHow Staking Rewards Actually Work: Nominal Rate, Compounding, and What Eats ItAn advertised 8 percent becomes 8.33 percent once daily rewards compound — and then 7.46 percent after a 10 percent validator commission, and less again after unbonding time. Here is each step, with the arithmetic laid out.ExplainerImpermanent Loss Explained: What Providing Liquidity Really CostsImpermanent loss is not a fee and it is not temporary: it is the gap between your liquidity position and simply having held the two tokens. Here is the formula, a table of price change against loss, and the fee income you would need to come out ahead.ExplainerVolatility Is Not Risk, and the Square Root of Time Is a ChoiceAnnualised volatility = period standard deviation × √(periods per year), and that √t scaling assumes independent increments. It is a model, not arithmetic: at a daily autocorrelation of 0.1 a 60 percent annualised figure should read 66.3. The payload is volatility drag — the arithmetic mean exceeds the geometric by about σ²/2, so at 8 percent average return and 40 percent volatility the compound outcome is zero.