About the Crypto Rebalancing Calculator
Over time, some coins in a portfolio grow faster than others, and your split drifts away from the plan. Rebalancing means selling a little of what has grown too big and buying what has fallen behind. This calculator does the sums. Type one line per asset: its name, its current value and the percentage you want it to be. Add new money if you plan to invest more. The tool shows each asset's current share, the target value, and exactly how much to buy or sell in money terms. A buy-only mode spends your new money on the assets that are under target so you do not have to sell, which can avoid taxes in some countries. It works for any assets, not only crypto, and everything stays in your browser.
Updated October 2026
How to use the Crypto Rebalancing Calculator
- 1Write one line for each asset: name, current value, target percent. Example: BTC 6000 50.
- 2Make sure the targets add up to 100 percent.
- 3Enter new money you want to add, if any.
- 4Choose Buy and sell, or Only buy.
- 5Read the table of actions and press Copy the plan.
Why a portfolio drifts
Prices move at different speeds. If bitcoin doubles while the rest stays flat, a portfolio that began at 50 percent bitcoin ends up near 67 percent bitcoin. The risk you carry has changed even though you did nothing. Rebalancing resets the risk to the level you planned, and some investors like that it pushes them to trim what has risen and add to what has fallen.
Rebalancing is not free. Each trade costs a fee, and selling at a profit can create a tax. That is why many people prefer buy-only rebalancing with each new deposit. Over a year of regular deposits it often brings the portfolio most of the way back without a single sale.
Working through an example
- You hold BTC 6,000, ETH 3,000 and SOL 1,000, and your targets are 50, 30 and 20 percent.
- The total is 10,000, so the target values are 5,000, 3,000 and 2,000.
- The plan: sell 1,000 of BTC, hold ETH and buy 1,000 of SOL.
- With 1,000 of new money in buy-only mode, you buy SOL only and the split is closer to the plan without selling.
Keep going
To size each new purchase against a stop, use the Crypto Position Size Calculator. For the profit on what you sold, the Stock Profit Calculator works for any asset, and the Dollar Cost Averaging Calculator shows the effect of regular buys. The Percentage Change Calculator helps to measure how far each asset moved.
Features
- Buy and sell amounts for every asset
- Optional new money to invest
- Buy-only mode that never sells
- Shows current share, target and result
- Checks that targets add up to 100 percent
- Accepts commas, spaces or tabs between values
- Works offline in your browser
Frequently asked questions
What does rebalancing mean?
It means bringing your portfolio back to the split you chose, for example 50 percent bitcoin, 30 percent ether and 20 percent others. You sell some of the winners and buy more of the laggards, or direct new money to the laggards.
How often should I rebalance?
There is no single answer. Some people rebalance on a calendar, like every quarter. Others do it when an asset drifts past a limit such as 5 percentage points. Fees and taxes make very frequent rebalancing costly.
What is buy-only mode?
It spends only your new money, split among the assets below target. Nothing is sold, so there is no sale to report. If the new money is small it may not reach the exact targets.
Does the tool include trading fees and taxes?
No. Selling can create a tax bill in many countries, and every trade has a fee. Check these before you act. The plan shows the trades before costs.
Can I use stablecoins and cash?
Yes. Add a line such as USDC 2000 20. Any asset with a value works.
Why does it say my targets are wrong?
The percentages must add up to exactly 100. The message shows the total it found, so you can fix a line.
Is this financial advice?
No. It is arithmetic. Which split to aim for is your own decision.