Fibonacci Extension Calculator
Project price targets beyond a swing move using the 127.2%, 161.8%, 200%, and 261.8% extension levels.
Targets Beyond the Swing
All Extension Targets
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Fibonacci extensions project price targets beyond the swing, using ratios greater than 100%: 127.2%, 161.8%, 200%, and 261.8%. Where a retracement level asks "how far back might price pull in?", an extension level asks "how far might price run once it resumes the original trend?"
This calculator uses the same swing low and swing high as this site's Fibonacci Retracement Calculator, just projected past the swing instead of within it, so the two are meant to be used together on the same move.
How does this calculator work?
Enter the swing low and swing high that define the completed move, and choose the trend direction: uptrend if the move ran from low to high and you expect it to keep pushing higher, or downtrend if it ran from high to low and you expect it to keep pushing lower.
For an uptrend, each target is calculated as swing low + (ratio × range), where range is swing high minus swing low. Since every ratio here is above 100%, every target lands above the swing high.
For a downtrend, the same ratios apply in the opposite direction: swing high − (ratio × range), landing every target below the swing low.
The 161.8% level is highlighted separately since it's the extension most commonly used as a first price target, but all four standard ratios are shown in the full table below, along with a chart showing each target relative to where the swing ended.
Worked example
The same $50-to-$100 stock swing used in the Retracement Calculator's example, now projecting upside targets in an uptrend.
- 127.2% extension
- $113.60
- 161.8% extension
- $130.90
- 200% extension
- $150.00
How the numbers work
The range is $100 − $50 = $50. The 161.8% target is $50 + (1.618 × $50) = $130.90, meaning price would need to run about 62% farther than the original $50 move.
The 200% target, exactly double the original range, is $50 + (2 × $50) = $150, a clean round-number way to think about the same projection.
Extension targets are commonly used to set a profit target or a partial take-profit level after a retracement completes and the trend resumes. Like retracements, they're a probability-weighted zone to watch, not a guarantee price will reach or respect any specific level.
Fibonacci Extension Calculator glossary
- Extension
- A price level beyond the original swing high or low, projected using a ratio above 100%, used to estimate how far a resumed trend might run.
- 161.8% Extension
- The most commonly used extension target, derived from the Fibonacci sequence's golden ratio (1.618), often used as a first profit-taking zone.
- Swing Range
- The price distance between the swing low and swing high (swing high minus swing low), the base unit every extension ratio is multiplied against.
Fibonacci Extension Calculator FAQs
Is this the same method as a 3-point extension?+
No. This calculator uses the simpler 2-point method, projecting straight off the original swing low and high. Many charting platforms also offer a 3-point method, which adds a third point (typically a retracement pullback low) and produces different, usually more conservative, target prices. Both are legitimate; this calculator implements the simpler and more commonly searched version.
Should I expect price to actually reach these levels?+
Not necessarily. Extension levels are targets many traders watch, which gives them some self-reinforcing weight, but they're projections based on a single completed swing, not a guarantee. Momentum, volume, and broader market context all matter for whether a target gets reached.
Can I use extension levels for a stop-loss instead of a target?+
They're typically used as profit targets rather than stops, since a stop is usually placed based on where the trade thesis is invalidated (often near a retracement level), not where price is expected to go if the trade works.
How does this relate to the Retracement Calculator?+
They share the same two inputs and the same underlying swing. Run the Retracement Calculator first to see where a pullback might end, then use this calculator on the same swing to see where price might go once the pullback is over.