# 7 Best Free Online Growth Rate Calculator Websites

This post covers the **best free online growth rate calculator websites**. A growth rate calculator determines the rise in numbers or quantity over a certain period of time. Such calculators are used in Biology at the molecular level. For example, you can use a growth rate calculator for microbes, bacteria, fungi, etc. Growth at molecular levels is generally exponential. It seems slow and lazy at first but then it explodes intensively.

Here you find 7 free websites that offer growth rate calculators. You can simply visit any of these calculators on respective websites and start using them right away. There is no login or signup required. You can add the numbers of bacteria or microbes at the beginning and end of the time interval. And with a given time interval, you can easily know the growth rate. You can also use these to determine the generation time of microorganisms.

### My Favorite Online Growth Rate Calculator

**OmniCalculator** is my favorite growth rate calculator on this list. This calculator is simple yet very functional. All the data points in this calculator are editable. That means you can use it to calculate any of those data points when you know the other data. You can calculate growth rate, exponential concentration, doubling time, initial concentration, or elapsed time.

You can check out our other lists of the best free online Chemical Reaction Simulator Websites, 3D Anatomy Software for Windows, and Medical Spell Checker Software For Windows.

### Table of Content

Websites | Growth Rate | Exponential Population | Time Elapsed | Doubling-Time |
---|---|---|---|---|

Omni Calculator | ✓ | ✓ | ✓ | ✓ |

Alto Gen Labs | x | ✓ | x | ✓ |

Dairy Science | x | ✓ | x | x |

Calculator AtoZ | ✓ | ✓ | ✓ | x |

nCalculators | x | ✓ | x | x |

Doubling-Time | x | x | x | ✓ |

EndMemo | ✓ | x | x | ✓ |

## OmniCalculator.com

**OmniCalculator.com** has a free generation time calculator. This calculator can find generation time from the initial and final population numbers and the growth rate. If you know the time interval then you can use this calculator to determine the growth rate as well. Along with that, this calculator also tells you the time by which the population gets double its original size.

### How to calculate growth rate with OmniCalculator?

- Go to this calculator using the link provided below.
- Then the number of bacteria at the starting time and end time.
- Add the time interval into the calculator to get the growth rate and doubling time.

### Highlights:

- This calculator can calculate the growth rate from changes in number and time duration.
- It can also determine the time interval when the growth rate is known.
- Along with the growth rate, it also gives you doubling time.

## AltoGenLabs.com

**AltoGenLabs.com** has a free online bacteria growth rate calculator. This is a simple calculator that has three input sections. This includes bacteria number at the initial time, bacteria number at the end time, and time passed. With those three entries, it gets you the exponential growth rate of the bacteria. Along with that, it also shows the doubling time. This is the time interval by which the bacteria grows double its original number.

### How to calculate growth rate with AltoGenLabs?

- Follow the link given below to open this calculator in your browser.
- Enter the number of bacteria at the initial and final time.
- Then add the time interval into the calculator and click the
**Calculate**button.

### Highlights:

- This calculator calculates the exponential growth rate from the change in population and time.
- It also determines the doubling time of the initial population/number of bacteria.

## DairyScience.info

**DairyScience.info** is a free website that offers a bacteria growth calculator. This calculator determines the number of bacteria after a specific incubation time. To do that, you have to provide the initial concentration of the bacteria along with incubation time and doubling time. When you do that, the results tell you what would be the number of bacteria after the given incubation time.

### How to calculate growth rate with DairyScience?

- Use the link added below to access this online calculator.
- Add the initial concentration along with incubation time, and doubling time.
- Then click the
**Submit**button to get the growth rate.

### Highlights:

- This calculator calculates the growth rate from incubation and doubling time.
- It tells you what the concentration of bacteria would be after the incubation time.

## CalculatorAtoZ.com

**CalculatorAtoZ.com** has a free online growth rate of bacteria calculator. This calculator determines the growth rate from the number of generations that grew over a specific period of time. So you can enter the number of generations and that incubation time period. With that, it gives you a growth rate. This calculator has an option to see the calculation steps. It includes major calculation steps including the formula. This is handy for students who are learning about the growth rate in biology.

### How to calculate growth rate with CalculatorAtoZ?

- Use the link given below to open this calculator in your browser.
- Enter the incubation time along with bacteria generation into the calculator.
- Then click the
**Calculate**button to get the growth rate.

### Highlights:

- This calculator calculates the growth rate from generation growth in a specific time period.
- It also shows the steps of calculation with the formula used.

## nCalculators.com

**nCalculators.com** is a free website that offers a *Geometric Population Growth Calculator*. This calculator packs multiple calculators inside. For bacteria growth, there are exponential growth and linear growth calculator. You can use any of those to determine the growth of a population. To do that, you need to know the initial population, growth rate, and time taken. With that, you can easily find accurate exponential or linear growth.

### How to calculate growth rate with nCalculators?

- Open this calculator by using the link added below. Make sure the correct calculator is selected in the dropdown.
- Enter the initial population, growth rate, and elapsed time.
- Then click the
**Calculate**button to get the exponential population.

### Highlights:

- This calculator calculates the exponential population.
- It packs many relevant calculators for various types of growth calculations.

## Doubling-Time.com

**Doubling-Time.com** has a simple cell doubling time calculator. This calculator determines the time it would take for cells to grow to double their initial number. For that, you have to add the initial concentration of the cells, the final concentration of cells, and the time taken to reach the final concentration from the initial. With those three data inputs, it tells you the doubling time of the cells.

### How to calculate growth rate with Doubling-Time?

- Follow the link given below to open this calculator in your browser.
- Enter the number of bacteria at the initial and final time.
- Then add the time interval into the calculator and click the
**Calculate**button.

### Highlights:

- This calculator calculates the doubling time of a cell concentration.

## EndMemo.com

**EndMemo.com** is yet another free website with an online growth rate calculator. This is a simple calculator that determines the growth rate from a change in concentration or number over time. You have to provide the initial number and final number along with the time passed to reach from initial to the final number. For that data, this calculator gets you the growth rate and the doubling time.

### How to calculate growth rate with EndMemo?

- Go to this calculator using the link provided below.
- Then the number of bacteria at the starting time and end time.
- After that, enter the time passed in the respective section.
- Then click the
**Calculate**button to get the growth rate.

### Highlights:

- This calculator can calculate the growth rate from changes in number and time duration.
- Along with the growth rate, it also gives you doubling time.

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