# Month-Over-Month Calculator

URL: https://speedycalculator.com/calculators/finance/month-over-month/
Last updated: 2026-10-25

> The month-over-month calculator works out the percentage growth between two months – for revenue, users, traffic or any metric – plus the compound monthly growth rate over several months and the annualized equivalent.

## Inputs

- Previous month value
- Current month value
- Value several months ago
- Number of months between them

## Results

- Month-over-month growth
- Change
- Compound monthly growth rate
- Annualized growth

## Formula

```
MoM growth = (this month − last month) ÷ last month × 100
Compound monthly growth = (end ÷ start)^(1/months) − 1
Annualized = (1 + monthly growth)^12 − 1
```

## Explanation

Startups track MoM growth closely – 15–20% a month is exceptional early on. Monthly figures are noisy; looking at the compound rate over several months smooths out one-off spikes.

### How to use the Month-Over-Month Calculator

- **Previous month value**
- **Current month value**
- **Value several months ago**
- **Number of months between them**

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

### How it works

Enter last month's and this month's values, and optionally a starting value and number of months for the compound rate.

### Tips

- Use consistent periods (a year or a quarter) for flow figures and period-end values for balances.
- Average opening and closing balances when a ratio mixes a flow with a stock.
- Benchmark against competitors in the same industry.
- Read the ratio together with others – profitability, liquidity and efficiency tell different stories.

### Common mistakes to avoid

- Using sales instead of cost of goods sold for inventory ratios.
- Mixing gross, operating and net profit.
- Ignoring one-off items that distort a single year.

### Inputs explained

FieldWhat to enterPrevious month valueAmount in your currencyCurrent month valueAmount in your currencyValue several months agoAmount in your currencyNumber of months between themA number

### What each result means

- **Month-over-month growth** = ([Current month value] - [Previous month value])÷abs([Previous month value])×100
- **Change** = [Current month value] - [Previous month value]
- **Compound monthly growth rate** = (([Current month value]÷[Value several months ago])^(1÷[Number of months between them]) - 1)×100
- **Annualized growth** = ((1 + [Month-over-month growth]÷100)^12 - 1)×100

### Example values

How the main result changes when **Previous month value** changes and everything else stays at the example values above:

Previous month valueMonth-over-month growth (%)21,000121.4331,50047.6242,00010.7152,500-11.4363,000-26.1984,000-44.64

## Worked example

Inputs — Previous month value: $42,000; Current month value: $46,500; Value several months ago: $30,000; Number of months between them: 6.

Results — **Month-over-month growth = 10.71 %**; Change = $4,500.00; Compound monthly growth rate = 7.58 %; Annualized growth = 239.19 %.

## FAQ

**How do I calculate month-over-month growth?**
(This month − last month) ÷ last month × 100.

**What is a good MoM growth rate?**
It depends on stage – early startups aim for 10–20%.

**What is CMGR?**
Compound monthly growth rate – the average monthly growth over several months.

**What formula does the Month-Over-Month Calculator use?**
MoM growth = (this month − last month) ÷ last month × 100.


## Sources

- [Corporate Finance Institute – financial ratios](https://corporatefinanceinstitute.com/)