# Fibonacci Retracement Calculator

URL: https://speedycalculator.com/calculators/finance/fibonacci-retracement/
Last updated: 2026-10-25

> The Fibonacci retracement calculator works out the retracement levels (23.6%, 38.2%, 50%, 61.8%, 78.6%) and extension levels (127.2%, 161.8%) between a swing high and swing low – for an uptrend or a downtrend.

## Inputs

- Trend
- Swing high
- Swing low

## Results

- Retracement 23.6%
- Retracement 38.2%
- Retracement 50%
- Retracement 61.8% (golden ratio)
- Retracement 78.6%
- Extension 127.2%
- Extension 161.8%

## Formula

```
Uptrend retracement level = high − (high − low) × ratio
Downtrend retracement level = low + (high − low) × ratio
Extensions use ratios above 100%
```

## Explanation

Traders watch Fibonacci levels as possible support and resistance. They are a technical analysis convention, not a law of markets – combine them with other signals.

### How to use the Fibonacci Retracement Calculator

- **Trend**
- **Swing high**
- **Swing low**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Choose the trend direction and enter the swing high and swing low prices.

### Tips

- Enter figures for the same period and in the same currency.
- Exchange rates and prices change constantly – update them before you rely on a result.
- Use results as estimates and confirm important figures with the official source.
- Everything runs in your browser – try different values to compare scenarios.

### Common mistakes to avoid

- Mixing gross and net figures.
- Using outdated rates.
- Treating rules of thumb as exact.

### Inputs explained

FieldWhat to enterTrendChoose one: Uptrend (retracing down from the high), Downtrend (retracing up from the low)Swing highAmount in your currencySwing lowAmount in your currency

### Example values

How the main result changes when **Swing high** changes and everything else stays at the example values above:

Swing highRetracement 61.8% (golden ratio)7590.45112.5104.78150119.1187.5133.43225147.75300176.4

## Worked example

Inputs — Trend: Uptrend (retracing down from the high); Swing high: $150; Swing low: $100.

Results — Retracement 23.6% = $138.20; Retracement 38.2% = $130.90; Retracement 50% = $125.00; **Retracement 61.8% (golden ratio) = $119.10**; Retracement 78.6% = $110.70; Extension 127.2% = $163.60; Extension 161.8% = $180.90.

## FAQ

**What are Fibonacci retracement levels?**
23.6%, 38.2%, 50%, 61.8% and 78.6% of a price move.

**Is 50% a Fibonacci number?**
No, but traders include it as a key level.

**Do Fibonacci levels work?**
They're widely watched, which can make them self-fulfilling, but they don't predict prices reliably.

**What formula does the Fibonacci Retracement Calculator use?**
Uptrend retracement level = high − (high − low) × ratio.