Percentage Change Calculator
Work out the percentage change between any two prices — a crypto entry and exit, yesterday and today, any two numbers. Instant, free, no sign-up.
Quick answer: percentage change = (new − old) ÷ old × 100. Enter your old and new price above and this calculator shows the signed % change, the absolute difference and the multiple (e.g. 1.4×). It runs entirely in your browser — no account, no data stored.
- Instant
- Shows the multiple
- No login
- Works offline
Updated June 2026
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The formula, and why it trips people up
Percentage change is one of those sums that looks trivial until a sign or a base sends it sideways. The rule is fixed: take the new value, subtract the old value, divide by the old value, then multiply by a hundred. So a coin that moves from $30,000 to $42,000 has risen (42,000 − 30,000) ÷ 30,000 × 100 = +40%. The single most common error is dividing by the new number instead of the old one, which quietly understates every gain and overstates every loss. The calculator above always divides by the starting figure, so you get the honest number.
The recovery trap that ruins portfolios
Here is the asymmetry every trader should internalise: a loss and the gain needed to undo it are not the same size. Drop 50% and you need +100% just to get back to even, because the rebound is measured against a smaller base. The pattern gets brutal at the extremes — a 25% fall needs +33%, a 50% fall needs +100%, an 80% fall needs +400%, and a 90% fall needs a tenfold +900%. This is why protecting against deep drawdowns matters far more than chasing the next big percentage gain, and it is the kind of context a bare calculator never gives you.
Percent versus percentage points
These two get muddled constantly, especially around fees and rates. If a fee rises from 1% to 2%, that is an increase of one percentage point — but it is a +100 percent change, because the fee doubled. Both statements are correct; they just measure different things. When you read that something “went up 100%”, check whether the writer means it doubled or simply rose by a hundred points from a percentage base. The tool above reports percent change; keep the distinction in mind when you compare it to headline figures.
Applying it to crypto sensibly
Percentage moves are the native language of crypto, but a number on its own says nothing about what comes next. A +40% week and a −40% week use the same maths and tell you nothing about tomorrow. Use this calculator to size a move accurately, to sanity-check a screenshot, or to compare two assets on equal footing — not as a forecast.
General information, not financial advice. Past percentage moves do not predict future ones; crypto is volatile and on-chain transactions are irreversible. Do your own research.
Percentage change — frequently asked questions
Short, direct answers about calculating percentage change.
How do I calculate percentage change?
Subtract the old value from the new value, divide by the old value, then multiply by 100. For example, $30,000 to $42,000 is (42000 − 30000) ÷ 30000 × 100 = +40%.
Why does a 50% loss need a 100% gain to recover?
Because the gain is measured against a smaller base. If $100 falls 50% to $50, getting back to $100 is a $50 rise on a $50 base — that is +100%. This asymmetry is why large drawdowns are so costly.
What is the difference between percent and percentage points?
A move from 1% to 2% is +1 percentage point, but +100 percent (it doubled). The calculator above gives percent change; keep the distinction in mind when comparing rates or fees.
