Sales Forecast Calculator
Estimate future sales revenue based on your current sales, expected growth rate, forecast period, and average order value.
Overview
A sales forecast calculator helps you estimate future revenue using your current monthly sales, expected monthly growth, forecast period, average order value, and any overall seasonal adjustment. It is useful for planning targets, budgets, stock levels, and staffing needs.
How it works
The calculator starts with your current monthly sales and applies your expected growth rate month by month using compound growth. It then adjusts the result for overall seasonality and estimates order volume by dividing projected revenue by your average order value. Total forecast revenue is estimated by summing the monthly revenue trend across the selected period.
How to use this calculator
- 1Enter your current average monthly sales revenue.
- 2Add your expected monthly growth rate.
- 3Choose the number of months you want to forecast.
- 4Enter your average order value.
- 5Include any overall seasonal adjustment if you expect demand to be higher or lower.
- 6Review your projected monthly sales, total forecast revenue, and estimated order volume.
Example Calculation
Current Monthly Sales Revenue
$25,000
Expected Monthly Growth Rate
5%
Forecast Period
12
Average Order Value
$75
Seasonality Adjustment
10%
Projected Monthly Sales
$49,386
If current monthly sales are 25000, growth is 5% per month, the forecast period is 12 months, average order value is 75, and seasonality adds 10%, the projected monthly sales at the end of the period would be about 49366, total forecast revenue would be about 418027, and projected monthly orders would be about 658.
Frequently asked questions
What does this sales forecast calculator estimate?
It estimates your future monthly sales revenue, total forecast revenue over the selected period, and projected order volume based on your inputs.
Can I use a negative growth rate?
Yes. A negative growth rate can be used to model declining sales over time.
What does the seasonality adjustment do?
It applies a single percentage adjustment to raise or lower the forecast to reflect expected seasonal demand across the period.
Does this calculator include costs or profit?
No. It forecasts sales revenue and order volume only, not profit, margins, or operating costs.
Why is average order value included?
Average order value helps convert projected revenue into an estimated number of orders or sales transactions.
How accurate is a sales forecast?
A sales forecast is only as reliable as the assumptions behind it. Actual results can differ if growth, pricing, customer demand, or market conditions change.
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Assumptions and warnings
Assumptions
- Results are estimates based on a constant monthly growth rate over the selected period.
- Seasonality is applied as a single overall adjustment rather than month-by-month variation.
- Average order value is assumed to stay consistent during the forecast period.
- The forecast does not account for taxes, refunds, discounts, or major operational changes unless reflected in your inputs.
Warnings
- This calculator provides an estimate only and should not be treated as financial advice.
- Actual sales can vary due to pricing changes, market conditions, customer behavior, and other business factors.