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Portfolio Allocation Builder Online

Portfolio Design
Portfolio Allocation
Design your ideal portfolio allocation with an interactive donut chart.
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Total is 0% — increase to reach 100%, or click "Normalize" to auto-adjust.

Portfolio Allocation Tool

Build your target portfolio allocation visually. Add asset classes, adjust percentages with sliders, and see the donut chart update in real time. Export as PNG or copy.

Related: Portfolio ROI Compound Interest FIRE Calculator

How to review portfolio allocation

  1. Enter each holding with its current value and asset class (equity, bond, crypto, cash, commodity).
  2. The tool aggregates the totals and shows your current weights against target weights you define.
  3. Review drift — positions that have moved more than 5% from target usually need attention.
  4. Use the rebalance suggestions to see the trades that would bring allocations back to target.

Common use cases

  • Performing a quarterly allocation review to catch drift from your target policy weights.
  • Evaluating whether a new contribution should go into the underweight asset class to rebalance without selling.
  • Stress-testing an allocation by seeing what happens when one asset class moves 20% up or down.
  • Documenting your target allocation so you can audit decisions over time as the mix evolves.

Frequently asked questions

How often should I rebalance?

Most research supports rebalancing when a position drifts 5 percentage points from target or on an annual schedule — whichever triggers first. Rebalancing more often adds friction without much benefit.

Should I include cash as an asset class?

Yes. Cash serves a strategic purpose (optionality, capital preservation) and counts toward your allocation. Omitting it overstates your equity exposure.

What is drift?

The difference between current weight and target weight. A 60/40 portfolio that grows to 70/30 after a bull run has drifted 10 points in equities — rebalancing sells equities to fund a bond purchase, bringing it back to 60/40.

Is my data stored?

No. All calculations run in your browser.

About portfolio allocation

Diversification across asset classes reduces risk. A balanced portfolio typically includes stocks, bonds, crypto, real estate, and cash. The ideal mix depends on your risk tolerance and time horizon.

  • Interactive donut chart
  • Up to 10 asset classes
  • Sliders + editable percentages
  • Normalize to 100% button
  • Export chart as PNG
  • Editable asset names

Free. No signup. Inputs stay in your browser. Ads via AdSense (consent required).

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