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Fibonacci Extension Calculator

Project trend-based Fibonacci extension targets from three points — the start of a move (A), its end (B) and the end of the pullback (C).

Support & ResistanceIntermediate
Your inputs
Results
1.618 extension target311.8161.8 from C
Pullback depth (B → C)50%of the A → B impulse
0.618 × AB211.8
1 × AB250
1.272 × AB277.2
2 × AB350
2.618 × AB411.8
A trend-based extension projects the size of the first impulse (A → B) from the end of the pullback (C): target = C + (B − A) × ratio. 1.0 is the classic measured move; 1.618 is the most-watched extended target.
A–B–C swing and projected targets
Extension targets
RatioTargetDistance from C
0.618211.8+61.8
1250+100
1.272277.2+127.2
1.618311.8+161.8
2350+200
2.618411.8+261.8

Not financial advice. Results are estimates based on the values you enter and simplified assumptions; real trades are affected by fees, slippage, gaps and other factors. Trading involves substantial risk of loss. Read the full disclaimer.

How to calculate Fibonacci extensions

Target = C + (B − A) × ratio Ratios: 0.618, 1.0, 1.272, 1.618, 2.0, 2.618

The formula works for both directions: if A is above B (a down move), the targets project below C.

Worked example

  1. Price rallies from A = 100 to B = 200, then pulls back to C = 150.
  2. 1.0 extension (measured move) = 150 + 100 × 1.0 = 250.
  3. 1.618 extension = 150 + 100 × 1.618 = 311.80.

How to interpret Fibonacci extensions

Extensions turn a completed swing into objective profit targets. The 1.0 level (an equal-sized second leg) is the classic measured move; 1.618 is the most widely watched extended target. Use them to set take-profits and check the resulting reward with the risk/reward calculator.

Support & Resistance

Fibonacci Retracement Calculator

Calculate 23.6%, 38.2%, 50%, 61.8% and 78.6% retracements plus extensions for any swing.

Low 100 · high 200 → 61.8% at 138.20
Support & Resistance

Pivot Point Calculator

Calculate standard, Fibonacci, Camarilla, Woodie and DeMark pivot points from the previous high, low and close.

H 110 · L 90 · C 100 → P 100, R1 110, S1 90
Risk Management

Risk/Reward Ratio Calculator

Compare a trade's potential reward with its risk and see the win rate you need to break even.

Entry 100 · Stop 95 · Target 110 → 1:2

Fibonacci Extension calculator FAQ

Retracement vs extension — what's the difference?

Retracements measure pullbacks within a swing; extensions project where the next leg may end beyond it.

What if price reaches 1.618 and keeps going?

Strong trends often reach 2.618. Trail your stop rather than assuming the level must hold.