📈 Revenue Forecast Calculator
A revenue forecast calculator that projects future revenue from a starting figure and a growth rate per period, with a full period-by-period table.
| Month | Projected revenue |
|---|---|
| 1 | $54,000 |
| 2 | $58,320 |
| 3 | $62,986 |
| 4 | $68,024 |
| 5 | $73,466 |
| 6 | $79,344 |
| 7 | $85,691 |
| 8 | $92,547 |
| 9 | $99,950 |
| 10 | $107,946 |
| 11 | $116,582 |
| 12 | $125,909 |
What Revenue Forecast Calculator Does
A revenue forecast built on a constant growth rate is compound growth, the same mathematics as compound interest — each period's growth applies to an already-grown base, not the original starting figure. That is why a modest-looking monthly rate produces a much bigger number over a year than multiplying the rate by the number of months would suggest, and it is the single most common point of confusion when people sanity-check a growth projection by hand.
The other common mistake is treating a single growth-rate assumption as a forecast rather than a scenario. Real revenue growth rates fluctuate, and a projection built on one constant rate is best used as one point in a range — run it again at a more conservative and a more optimistic rate to see how sensitive the outcome actually is to the assumption.
How to Use Revenue Forecast Calculator
- Enter your current revenue and expected growth rate per period
- Choose the number of periods and the period type (month, quarter, year)
- Read the projected end revenue, total growth, and the period-by-period table
Formula Used by Revenue Forecast Calculator
Compound revenue growth
Revenue(n) = Revenue(0) × (1 + growth rate)ⁿ
Worked example
$50,000 starting revenue, 8% monthly growth, 12 months
- Revenue(12) = 50,000 × (1.08)^12
- 1.08^12 ≈ 2.518
Result: ≈ $125,900 after 12 months — a 152% total increase from an 8%-per-month rate
How to Read Your Result
Small rate differences compound into large outcome differences
The gap between a 5% and 10% monthly growth assumption looks small stated as a percentage, but compounded over a year it is the difference between roughly 1.8x and 3.1x growth — sensitivity-testing the rate matters more than getting a single "best guess" rate exactly right.
No real business grows at a perfectly constant rate
This model is a simplification used for planning and scenario comparison, not a prediction — actual revenue has seasonality, one-time events, and rate changes as a company matures that a constant-rate compound model smooths away entirely.
Limitations & Accuracy Notes
- Assumes a constant growth rate every period — does not model seasonality, one-time events, or a growth rate that itself changes over time.
- A small change in the growth rate assumption compounds into a large change in the final projected figure, especially over many periods — treat the output as one scenario, not a precise prediction.
- Does not account for costs — this projects revenue only, not profit.