Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Impermanent loss
-4.17%
Dollar loss vs holding
$584
Fees earned
$493
Verdict
Holding would have been better
Psst — share this and help Rex grow
One click, a permanent link with your numbers baked in.
How to use this
- 1Enter token a price change (%).
- 2Enter token b price change (%).
- 3Enter deposit value ($).
- 4Enter pool fee apr (%).
- 5Enter days in pool.
- 6Read your impermanent loss on the right — it updates as you type.
- 7Hit Share to keep the scenario or send it to someone.
About this calculator
Providing liquidity in a 50/50 pool costs you when prices diverge. This shows the impermanent loss percentage and whether fees cover it.
Worked example
Using the values the calculator loads with:
Inputs
- Token A price change: 80 %
- Token B price change: 0 %
- Deposit value: 10000 $
- Pool fee APR: 20 %
- Days in pool: 90
Results
- Impermanent loss: -4.17%
- Dollar loss vs holding: $584
- Fees earned: $493
- Verdict: Holding would have been better
What each field means
Inputs
- Token A price change (%)
- The token a price change used in the calculation, measured in %. Starts at 80 % so you have a working example on load.
- Token B price change (%)
- The token b price change used in the calculation, measured in %. Starts at 0 % so you have a working example on load.
- Deposit value ($)
- The deposit value used in the calculation, measured in $. Starts at 10000 $ so you have a working example on load.
- Pool fee APR (%)
- The pool fee apr used in the calculation, measured in %. Starts at 20 % so you have a working example on load.
- Days in pool
- The days in pool used in the calculation. Starts at 90 so you have a working example on load.
Results
- Impermanent loss
- Returned as a percentage and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Dollar loss vs holding
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Fees earned
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Verdict
- Returned as a plain value. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the impermanent loss calculator work?
Providing liquidity in a 50/50 pool costs you when prices diverge. This shows the impermanent loss percentage and whether fees cover it. The underlying maths is: IL = 2√r / (1 + r) − 1, where r is the relative price ratio change.
What do I need to enter?
5 values: token a price change, token b price change, deposit value, pool fee apr, and days in pool. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the impermanent loss result mean?
It is returned as a percentage and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
Who is this tool for?
It's built for anyone comparing money scenarios before committing — budgeting a payment, sanity-checking a quote, or seeing what a change in rate or term actually costs.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Impermanent Loss Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/impermanent-loss
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/impermanent-loss" target="_blank" rel="noopener">Impermanent Loss Calculator — RevenueLab</a> (2026).</p>
Source: [Impermanent Loss Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/impermanent-loss) (2026).