Annualised Return
Earning 8% in 90 days scales linearly to 32.4% a year, or 36.5% if you assume compounding. The second figure shown is the linear one.
Your numbers
Annualised
36.63%
Rate
32.44%
Formula
Annualised = ((1 + Return ÷ 100) ^ (365 ÷ Days held) − 1) × 100
Annualising a short run inflates the headline number — be wary of ads that turn a few days of gains into hundreds of percent.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| Return (%)How much you made relative to what you put in. | 8 | No limit |
| Days heldHow many days you held it before selling. | 90 | 1 and up |
Step by step
Quick reference table
Results when only Return (%) changes and everything else stays put.
| Return (%) | Annualised (%) | Rate (%) |
|---|---|---|
| 4 | 17.24 | 16.22 |
| 6 | 26.66 | 24.33 |
| 8 | 36.63 | 32.44 |
| 12 | 58.35 | 48.67 |
| 16 | 82.56 | 64.89 |
What each result means
| Result | At default values |
|---|---|
| Annualised (%)A short-period return stretched to a year — not money actually earned. | 36.63 |
| Rate (%)The rate applied — usually per year. | 32.44 |
Common mistakes
Annualising a short run inflates the headline number — be wary of ads that turn a few days of gains into hundreds of percent.
Glossary
- Return
- How much you made relative to what you put in.
- Days held
- How many days you held it before selling.
- Annualised
- A short-period return stretched to a year — not money actually earned.
- Rate
- The rate applied — usually per year.
Frequently asked questions
Q. How is Annualised Return calculated?
Annualised = ((1 + Return ÷ 100) ^ (365 ÷ Days held) − 1) × 100 — Earning 8% in 90 days scales linearly to 32.4% a year, or 36.5% if you assume compounding. The second figure shown is the linear one.
Q. Can you walk through an example?
With Return 8%, Days held 90, the answer is Annualised 36.63%.
Q. What do I need to enter?
Enter Return, Days held. The result recalculates as you type, and an empty box counts as zero.
Q. How much does the answer move if I change a number?
Changing only Return (%) moves the answer to Return (%) 4 → Annualised (%) 17.24 and Return (%) 16 → Annualised (%) 82.56. The table below lays out five steps.
Q. How are the numbers rounded?
Money is shown to the nearest whole unit, percentages to one decimal place and everything else to two. What you see is rounded; the calculation itself carries the unrounded value forward.
Q. Anything to watch out for?
Annualising a short run inflates the headline number — be wary of ads that turn a few days of gains into hundreds of percent.
Related calculators
Tax rates and interest conventions differ by country and product — check your contract for real transactions.