Revenue Growth Calculator
Measure percentage revenue growth between two periods.
About this calculator
Revenue growth rate is the standard way to describe how fast a business is growing: the percentage change between one period and the next. It normalises for size, so a £10k business and a £10m business can be compared on the same footing. Enter the previous period's revenue and the current period's revenue — the calculator returns the growth percentage, the absolute change and the growth multiple.
The formula
Worked example
Revenue rose from £42,000 last year to £51,000 this year:
- Growth = (£51,000 − £42,000) ÷ £42,000 × 100 = +21.4%
Common mistakes
- Comparing periods of unequal length, such as a 5-week month against a 4-week month.
- Ignoring seasonality — compare against the same period last year, not the previous month, for seasonal businesses.
- Celebrating revenue growth that came from margin-destroying discounts.
Frequently asked questions
Assumptions & limitations
Both figures should cover equal-length periods and be measured the same way (both net of VAT, both recognised on the same basis).
Sources & verification
This calculator applies the standard formula published above to the figures you enter — it relies on no external statutory data. The formula and the worked example were checked by hand against each other.
Spotted an error or an out-of-date figure? Report it — corrections are prioritised over all other work (see our corrections policy).