An **Egg Boiling Calculator** is a **handy tool** that helps determine the **perfect cooking time** for boiling eggs based on **t = 0.451 M^(2/3) ln(0.76 * (T_w – T_0) / (T_y – T_0))** formula.

To convert between **Celsius** and **Fahrenheit**, use the following equations:

**°F = (°C * 9/5) + 32****°C = (°F – 32) * 5/9**

## Egg Boiling Calculator

Egg Size | Starting Temp | Desired Doneness | Boiling Time | Internal Temp |
---|---|---|---|---|

Small (50g) | 4°C (39°F) | Soft | 5 min 30 sec | 63°C (145°F) |

Medium (58g) | 4°C (39°F) | Soft | 6 min 15 sec | 63°C (145°F) |

Large (67g) | 4°C (39°F) | Soft | 7 min | 63°C (145°F) |

Small (50g) | 4°C (39°F) | Medium | 7 min | 68°C (154°F) |

Medium (58g) | 4°C (39°F) | Medium | 8 min | 68°C (154°F) |

Large (67g) | 4°C (39°F) | Medium | 9 min | 68°C (154°F) |

Small (50g) | 4°C (39°F) | Hard | 9 min | 74°C (165°F) |

Medium (58g) | 4°C (39°F) | Hard | 10 min | 74°C (165°F) |

Large (67g) | 4°C (39°F) | Hard | 11 min | 74°C (165°F) |

## Egg Boiling Chart

Egg Size | Soft-Boiled | Medium-Boiled | Hard-Boiled |
---|---|---|---|

Small | 5 minutes | 7 minutes | 9 minutes |

Medium | 6 minutes | 8 minutes | 10 minutes |

Large | 7 minutes | 9 minutes | 11 minutes |

## Egg Boiling Formula

The formula is as follows:

**t = 0.451 M^(2/3) ln(0.76 * (T_w – T_0) / (T_y – T_0))**

Where:

**t**is the cooking time in minutes**M**is the mass of the egg in grams**T_w**is the temperature of the boiling water (usually 100°C or 212°F)**T_0**is the initial temperature of the egg before being placed in the water**T_y**is the desired temperature of the egg yolk

Suppose we have a **large egg** weighing **70 grams**, taken straight from the refrigerator at **4°C** (39.2°F). We want to achieve a firm yolk with a temperature of **70°C** (158°F).

The boiling water is at **100°C** (212°F). Plugging these values into the formula gives us a cooking time of approximately **8.4 minutes**.

The most commonly used **egg boiling formula** was developed by **Dr. Charles D. H. Williams**, a British scientist. His formula takes into account the **mass of the egg**, the **temperature of the egg** before boiling, and the **desired temperature** of the yolk.

## How Long Should I Boil an Egg?

The ideal boiling time for an egg depends on several factors, including the **size of the egg**, its **starting temperature**, your **desired level of doneness**, and even the **altitude** at which you’re cooking.

For **soft-boiled eggs** with a runny yolk, you typically want to boil large eggs for about **6-7 minutes**.

This will result in a fully cooked white and a warm, liquid yolk.

**Medium-boiled eggs**, where the yolk is partially set but still somewhat creamy, usually require about **8-9 minutes** of boiling for large eggs.

For **hard-boiled eggs** with fully set yolks, you’ll want to boil large eggs for about **10-12 minutes**.

### Egg Boiling Temperature and Time

The relationship between **temperature and time** is crucial in achieving the perfect boiled egg.

**Soft-boiled eggs**: Approximate cooking time:**5-7 minutes****Medium-boiled eggs**: Approximate cooking time:**7-9 minutes****Hard-boiled eggs**: Approximate cooking time:**10-12 minutes**

## The 555 Rule for Boiling Eggs

The **555 rule** for boiling eggs is a simple method to achieve different levels of doneness.

This rule suggests:

**5 minutes**for soft-boiled eggs**10 minutes**for medium-boiled eggs**15 minutes**for hard-boiled eggs

## Is 12 Minutes Enough to Boil an Egg?

Boiling an egg for **12 minutes** will typically result in a fully **hard-boiled egg** with both the white and yolk completely set.

**Egg size**: A 12-minute cooking time is suitable for large eggs. If you’re using extra-large or jumbo eggs, you might need to add an extra minute or two.**Starting temperature**: If your eggs are at room temperature rather than refrigerated, 12 minutes of boiling might result in slightly overcooked eggs.**Altitude**: At higher altitudes, water boils at a lower temperature, so 12 minutes might not be enough to fully hard-boil an egg.**Personal preference**: Some people prefer their hard-boiled eggs with a slightly softer center, in which case 12 minutes might be too long.

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