Portfolio Return Calculator — Weighted Average Return

Portfolio return is the combined gain or loss of all the assets in your investment portfolio, measured over a specific period and expressed as a single percentage. Instead of looking at each stock, bond, or fund in isolation, portfolio return tells you how your entire collection of investments performed together — which is what actually matters for building wealth.

The reason portfolio return matters more than any individual holding is diversification. A portfolio that holds stocks, bonds, and other asset classes will not move in lockstep with any one of them. If stocks drop 10% but bonds rise 5% and bonds make up 40% of the portfolio, the portfolio loss is far smaller than 10%. Calculating portfolio return captures that blended effect, which is the core benefit of building a diversified portfolio in the first place.

Whether you manage a simple two-fund portfolio or a complex allocation across domestic stocks, international equities, fixed income, and alternatives, the weighted average return is the standard method for measuring performance. It is also the number you should compare against your target return or a relevant benchmark — not the return of any single holding. Our stock data platform provides the individual asset returns you need to plug into this calculator.

Enter each asset class or holding in your portfolio along with two values: its weight (as a percentage of your total portfolio) and its return over the period you are measuring. The weights must add up to 100%.

Step 1: List Your Holdings

Add a row for each distinct asset class or individual holding. For example, if your portfolio is split across U.S. stocks, international stocks, and bonds, you would have three rows.

Step 2: Enter Weights and Returns

For each row, enter the percentage of your portfolio allocated to that asset (the weight) and its return over the measurement period. For instance, if 60% of your portfolio is in U.S. stocks that returned 12% this year, enter 60% as the weight and 12% as the return.

Step 3: Review the Result

The calculator multiplies each weight by its return and sums the results to produce your total portfolio return. You can add or remove rows to model different allocation scenarios and see how shifting weights changes the outcome.

The weighted average portfolio return formula is: Portfolio Return = Σ(weight_i × return_i). For each asset i, multiply its weight by its return, then sum all the products. If you have three assets with weights w₁, w₂, w₃ and returns r₁, r₂, r₃, the portfolio return is (w₁ × r₁) + (w₂ × r₂) + (w₃ × r₃).

This formula works because weights represent the fraction of the portfolio that each asset contributes to the total return. A 60% allocation to a stock that returned 10% contributes 6% to the portfolio (0.60 × 10%), while a 40% allocation to a bond that returned 3% contributes 1.2% (0.40 × 3%). The sum — 7.2% — is the portfolio return.

In mathematical notation: Rₚ = Σᵢ (wᵢ × Rᵢ), where wᵢ is the weight of asset i (with Σwᵢ = 1), and Rᵢ is the return of asset i. This is a linear combination, which means the portfolio return is always a weighted average of the individual returns — it cannot exceed the highest individual return or fall below the lowest individual return, regardless of how the weights are distributed.

Example 1: A Simple 60/40 Portfolio

A classic 60/40 portfolio allocates 60% to stocks and 40% to bonds. Suppose stocks returned 12% this year and bonds returned 3%. The portfolio return is (0.60 × 12%) + (0.40 × 3%) = 7.2% + 1.2% = 8.4%. Even though stocks performed much better, the bond allocation dragged the overall return below the stock-only return — but also reduced the portfolio's volatility compared to a 100% stock allocation.

Example 2: A Four-Asset Portfolio

Consider a portfolio with 40% U.S. stocks (return: 15%), 20% international stocks (return: 8%), 30% bonds (return: 4%), and 10% REITs (return: 10%). The weighted return is (0.40 × 15%) + (0.20 × 8%) + (0.30 × 4%) + (0.10 × 10%) = 6.0% + 1.6% + 1.2% + 1.0% = 9.8%. This shows how international diversification adds a modest boost while the bond allocation provides stability.

Example 3: A Portfolio With a Losing Asset

If 70% of your portfolio is in stocks that returned 20%, but 30% is in a commodity fund that lost 5%, your portfolio return is (0.70 × 20%) + (0.30 × -5%) = 14.0% + (-1.5%) = 12.5%. The losing asset still reduced the overall return, but the portfolio still ended positive because the winning allocation was larger.

Example 4: Comparing Two Allocations

Portfolio A is 80% stocks (return: 10%) and 20% bonds (return: 3%) = 8.6%. Portfolio B is 50% stocks (return: 10%) and 50% bonds (return: 3%) = 6.5%. Portfolio A returned more, but it also carried more risk. The return difference is entirely explained by the weight shift — both portfolios held the exact same assets.

Use Period-Appropriate Returns

If you are calculating a one-year portfolio return, use each asset's one-year return. If you are calculating a five-year return, use five-year returns. Mixing return periods (e.g., a one-year stock return with a ten-year bond return) produces a meaningless number.

Recalculate After Rebalancing

Weights change as assets grow at different rates. A portfolio that started as 60/40 might drift to 70/30 after a strong stock year. Recalculate portfolio return using actual period-end weights for accuracy, or use beginning-of-period weights if you want to measure the return of your intended allocation.

This Calculator Does Not Measure Risk

Portfolio return tells you how much the portfolio grew, but not how bumpy the ride was. Two portfolios with identical returns can have vastly different volatility profiles. Pair this calculation with our portfolio variance calculator or Sharpe ratio calculator to understand the risk side of the equation.

Include All Assets, Not Just Stocks

A complete portfolio return includes every investable asset — bonds, cash, real estate, commodities, and alternatives. Excluding the bond or cash portion overstates your portfolio's true return and gives a misleading picture of performance.

Watch for Currency Effects in International Holdings

If you hold international assets, their returns may be reported in local currency or converted to your home currency. Make sure all returns are in the same currency before calculating portfolio return, or the result will be distorted by exchange rate movements.

All content on this page is educational and does not constitute financial advice. Portfolio return is a backward-looking metric and does not predict future performance. For personalized guidance, consult a certified financial planner.