Daily Percentage Return Calculator
A stock up 7 dollars sounds good until you ask the only question that lets you compare it with anything else: 7 dollars on what? This calculator turns one day’s move into a percentage of the starting value, so a position of any size can be judged, compared, and logged on the same scale.
Enter the value at the start of the day and the value at the close. You get the daily percentage return, the dollar change behind it, and the return per 1,000 invested, for a stock, a crypto position, a fund, or a whole portfolio.
How it was calculated
Price return only. Dividends, interest, fees, and taxes are not included unless you fold them into the final value yourself, as the worked example explains.
Quick Answer
Key takeaways
- Daily percentage return is (final minus initial) divided by initial, times 100. The starting value is always the denominator.
- The percentage and the dollar change answer different questions: percentages compare assets of different sizes, dollars tell you what your account actually did.
- Daily returns cannot be added across days. They link by multiplication, which is why +5.40% followed by -4.00% nets +1.18%, not +1.40%.
- This is a price return. A dividend paid that day only counts if you add it to the final value.
- Quick Answer
- How to use the daily percentage return calculator
- The formula: a one-day holding period return
- Worked example: a 12,500 portfolio closes at 13,175
- Chaining days, and the annualizing trap
- Simple return or log return: which one your statement uses
- What competing calculators miss
- Frequently Asked Questions
- Add This Calculator to Your Website
- References
How to use the daily percentage return calculator
Enter the value at the start of the day and the value at the end of the same day, then press Calculate. For a stock, that is usually yesterday's closing price (or this morning's open) and today's close. For a portfolio, use the account value at the same two moments, and be careful about deposits: money you added during the day is not a gain, so either measure from just after the deposit or leave that day out of your return log.
The result leads with the percentage, then shows the dollar change, the return per 1,000 invested, and the log return for the same day, with a step-by-step breakdown underneath. If you are comparing several holdings, the per-1,000 row is the honest comparison: it strips out position size so a small holding with a big day is not mistaken for your best performer in money terms. For the underlying percentage math in non-investment settings, the change in percentage calculator runs the same division on any two numbers.
The formula: a one-day holding period return
The formula is the holding period return from standard portfolio theory, applied to a single day. It asks how much the value changed, relative to what you started with.
The CFA curriculum's measures of return present the holding period return exactly this way, and the one-day version inherits its two defining traits. It is not annualized: a daily return says nothing by itself about a year. And it is scale-free: a 5.40% day means the same proportionally on a 250 position and a 250,000 portfolio, which is the whole reason traders quote percentages instead of dollars. Note what the formula does with a loss: the denominator is still the starting value, so falling from 8,500 to 8,160 is -4.00%, and climbing back from 8,160 to 8,500 would be +4.17%. Losses and gains are not symmetric, which matters in the section below.
Worked example: a 12,500 portfolio closes at 13,175
The calculator is pre-filled with this case, and every figure below is what it returns. Change = 13,175 − 12,500 = 675. Return = 675 ÷ 12,500 × 100 = +5.40%.
| Day | Start | Close | Dollar change | Daily return |
|---|---|---|---|---|
| Worked example | 12,500 | 13,175 | +675.00 | +5.40% Gain |
| A losing day | 8,500 | 8,160 | -340.00 | -4.00% Loss |
| A flat day | 250 | 250 | 0.00 | 0.00% Flat |
| A small account, big day | 100 | 107 | +7.00 | +7.00% Gain |
The last row teaches the main reading skill. A +7.00% day sounds stronger than the worked example's +5.40%, and proportionally it is, but it added 7.00 while the portfolio added 675.00. Rank your holdings by percentage to judge the assets, and by dollars to judge your wealth. Both rows sit in the results panel so neither view gets lost.
Chaining days, and the annualizing trap
A single daily return is a snapshot. The moment you combine days, the arithmetic changes: returns chain geometrically, multiplying growth factors rather than adding percentages. This is the calculation methodology the CFA Institute's GIPS guidance statement on calculation methodology requires for time-weighted performance, and it is why your broker's reported return rarely equals the sum of your daily numbers.
Run the worked example forward one more day with the losing row's number. Day 1: +5.40%, so 12,500 becomes 13,175. Day 2: -4.00%, so 13,175 becomes 12,648. Two-day return: 12,648 ÷ 12,500 − 1 = +1.18%. Adding the percentages gives +1.40%, which overstates the result because the second day's loss applied to a larger balance. The dedicated time-weighted return calculator chains a whole series of sub-period returns this way, and the CAGR return calculator compresses a multi-year run into one smoothed annual rate.
The related trap is annualizing a single day. Multiplying +5.40% by 365 claims a 1,971% year; compounding it claims something larger still. Both are arithmetic, neither is information. A useful reality check is the long-run record itself: the S&P 500 returns calculator shows what the index's daily moves actually compound to over real periods, which is the honest backdrop for judging whether one strong day means anything.
Simple return or log return: which one your statement uses
Simple return (this tool's headline)
- (Final − initial) ÷ initial × 100
- Worked example: +5.40%
- Matches your account balance movement
- What brokers and statements report
Log return (shown for comparison)
- ln(final ÷ initial) × 100
- Worked example: +5.26%
- Adds cleanly across days and reverses symmetrically
- Used in quantitative models and volatility work
For one day, the two measures sit close together and drift apart as moves get bigger: a +50% day is a +40.55% log return, and a -50% day is a -69.31% log return. Neither is wrong; they answer to different jobs. If you are reconciling a statement or comparing two assets for a human decision, use the simple return. If you are feeding a model that sums returns over time, the log version, also shown in the results, is the input it expects.
What competing calculators miss
The top-ranking tools for this keyword were reviewed while preparing this page. They agree on the formula, and they share the same shortcomings.
Miss 1: a percentage with no dollars attached. Every competitor reviewed returns the percentage alone. A -4.00% day on 8,500 costs 340.00, and a trader who cannot see that number has to do a second calculation to know whether the day mattered. The dollar change and the per-1,000 figure are in the results here.
Miss 2: silence about dividends and income. The textbook holding period return includes income; the competing pages present the price-only formula without saying so, which quietly understates returns on dividend stocks. This page names the limit on the calculator itself and explains the one-step fix: add the payment to the final value.
Miss 3: no warning against adding or annualizing daily returns. Nothing on the competing pages stops a reader from summing a month of daily percentages or multiplying one day by 365, the two most common ways this metric gets misused. Both traps are worked through with real numbers above.
One honest limit: two values cannot see inside the day. A position that swung wildly and closed near its open shows a small return here, because intraday volatility is a different measurement from close-to-close change.
Frequently Asked Questions
It is the gain or loss on an investment over a single day, expressed as a percentage of the day's starting value: (final value minus initial value) divided by initial value, times 100. A portfolio that opens at 12,500 and closes at 13,175 has a daily return of +5.40 percent.
Yes, for a one-day holding period. The holding period return formula taught in the CFA curriculum is (ending value minus beginning value plus income) divided by beginning value. This calculator covers the price-only version: if a dividend or interest payment landed during the day, add it to the final value before entering it.
Because the formula divides by the starting value, and division by zero is undefined. A position that starts the day worth nothing has no meaningful percentage return; any gain from zero is tracked in dollars instead.
Multiply the percentage by your starting value. On 8,500, a -4.00 percent day is a loss of 340.00, leaving 8,160. The results panel shows the dollar change next to the percentage for exactly this reason: percentages compare assets, dollars pay bills.
Not by adding or taking a simple average. Daily returns link geometrically: multiply (1 + r) for each day, subtract 1 at the end. A +5.40 percent day followed by a -4.00 percent day gives +1.18 percent overall, not the +1.40 percent that adding suggests. That geometric linking is the basis of time-weighted return.
No. That shortcut ignores compounding and produces absurd figures, like turning +5.40 percent in a day into a 1,971 percent year. A compounded annualization raises (1 + r) to the power of the days in a year, which is even larger and just as misleading for a single noisy day. Daily returns describe a day; use a longer window for annual claims.
The simple return here divides the change by the starting value. A log return takes the natural log of final divided by initial, which gives +5.26 percent for the worked example instead of +5.40 percent. Log returns add up cleanly across days, which is why quants like them, while simple returns match how your balance actually moves, which is why statements report them.
No. It compares two values only, so it measures price change. To fold in a dividend, add the payment to the final value first. Fees and taxes depend on your broker and jurisdiction, so subtract known fees from the final value before calculating if you want a net figure.
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References
- AnalystPrep, "Measures of Return", CFA Level 1 portfolio management notes presenting the holding period return formula (P1 − P0 + D) ÷ P0. AnalystPrep: Measures of Return. Accessed October 2026.
- CFA Institute, "Guidance Statement on Calculation Methodology", GIPS guidance requiring geometric linking of sub-period returns for time-weighted performance. CFA Institute: GIPS Guidance Statement on Calculation Methodology. Accessed October 2026.
- U.S. Securities and Exchange Commission, Investor.gov, "Compound Interest Calculator", for how a series of periodic returns compounds rather than adds. Investor.gov: Compound Interest Calculator. Accessed October 2026.
- U.S. Securities and Exchange Commission, Investor.gov, "Investor Bulletin: World Investor Week", on diversification and judging returns over full periods rather than single days. Investor.gov: Investor Bulletin, World Investor Week. Accessed October 2026.
- Corporate Finance Institute, "Rate of Return", the return formula, its variants, and worked examples across asset classes. CFI: Rate of Return. Accessed October 2026.
- Damodaran, Aswath, NYU Stern School of Business, "Historical Returns on Stocks, Bonds and Bills", the long-run return record for judging whether one day's move is unusual. NYU Stern: Historical Returns Data. Accessed October 2026.
- S&P Dow Jones Indices, "SPIVA Scorecards", active versus index performance measured on properly linked returns. S&P Dow Jones Indices: SPIVA. Accessed October 2026.
- Weisstein, Eric W., Wolfram MathWorld, "Exponential Growth", background on the logarithmic form used for continuously compounded (log) returns. MathWorld: Exponential Growth. Accessed October 2026.