Digital Asset Portfolio Calculator
Rebalance a digital asset portfolio to target allocations.
Calculate how much of each digital asset to buy or sell to reach target allocation percentages. Enter asset 1 current value to see trades needed to rebalance.
What this tool does
This calculator models how to rebalance a digital asset portfolio by comparing current holdings against target allocation percentages. It takes your current value in each asset and your desired percentage allocation, then calculates the specific buy and sell amounts needed to bring your portfolio into line. The result shows the monetary value to buy or sell for each asset, plus how much cash or stablecoin balance changes as a result. The calculation is driven primarily by the gap between what you currently hold and what your targets specify—larger gaps mean larger trades. For example, if you hold 60% of an asset but target 40%, the tool indicates how much to sell. The output assumes no trading costs, price movements during execution, or tax implications, and treats all assets as divisible. Results are for educational illustration of rebalancing mechanics.
Enter Values
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Formula Used
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Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
Portfolio rebalancing brings allocations back to target after price moves. A three-asset portfolio where one asset ran 80% will drift above target. Rebalancing sells the winner and buys the laggards. This calculator works on the two largest slots plus a stable sleeve — enough to model most allocations without over-complicating the UI.
What the result means
Positive = buy more of that asset to reach target. Negative = sell that amount. Rebalancing discipline is a structural risk management tool regardless of asset class.
Run it with sensible defaults
Using asset 1 current value of 6,000, asset 1 target of 50%, asset 2 current value of 3,000, asset 2 target of 30%, the calculation works out to 1,000.00. The defaults are meant as a starting point, not a recommendation.
The levers in this calculation
The inputs — Asset 1 Current Value, Asset 1 Target %, Asset 2 Current Value, Asset 2 Target %, and Stable/Cash Value — do not pull with equal force. The rate and the time horizon usually dominate — compounding means a small change in either reshapes the final figure more than a similar shift in contribution size. Test this by doubling one input at a time.
How the math works
Compute portfolio total, apply target percentages, subtract current values to get buy or sell amounts per asset.
Why investors run this
Most people's intuition for compounding is wrong — not because the math is hard, but because linear thinking doesn't account for curves. Running numbers through a calculator like this one is the cheapest way to recalibrate that intuition before making an irreversible decision about contribution rate, asset mix, or retirement age.
What this doesn't capture
Steady-rate math ignores real-world volatility. Actual returns are lumpy; sequence-of-returns risk matters most in drawdown; fees and taxes drag on compound growth; and behaviour changes in drawdowns can reduce outcomes below the projection. The number represents one scenario rather than a forecast.
Rebalancing your portfolio of £6,000 and £3,000 toward target allocations produces 1,000.00 in adjustment amounts.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
Compute portfolio total, apply target percentages, subtract current values to get buy or sell amounts per asset.
References
Frequently Asked Questions
How often should I rebalance?
Do I need to rebalance at all?
Tax implications?
Should stablecoins always have a sleeve?
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