# Sales Forecast Calculator

> Sales Forecast: Forecast = Σ (stage pipeline value × stage close probability). Methodology stated, your own inputs only.

Page: https://freecalculator.tech/tools/sales-forecast-calculator
Last reviewed: 2026-10-15

## Formula

Forecast = Σ (stage pipeline value × stage close probability).

- Methodology: stage-weighted (probability-weighted) pipeline forecast.
- Probabilities must come from your own historical stage-to-close rates; no default stage probabilities are used.
- It gives an expected value, not a commit or best-case figure.
- Forecast = Σ (stage pipeline value × stage close probability).
- Inputs used: Currency (symbol only, never converted), Stage 1 pipeline value, Stage 1 close probability (your figure), Stage 2 pipeline value (blank = none), Stage 2 close probability (your figure) (blank = none), Stage 3 pipeline value (blank = none), Stage 3 close probability (your figure) (blank = none), Stage 4 pipeline value (blank = none), and other shown inputs.

## Inputs

- Currency (symbol only, never converted)
- Stage 1 pipeline value
- Stage 1 close probability (your figure)
- Stage 2 pipeline value (blank = none)
- Stage 2 close probability (your figure) (blank = none)
- Stage 3 pipeline value (blank = none)
- Stage 3 close probability (your figure) (blank = none)
- Stage 4 pipeline value (blank = none)
- Stage 4 close probability (your figure) (blank = none)

## Worked example: Four stages

$400k at 10%, $300k at 30%, $200k at 60%, $100k at 90%.
1. 40,000 + 90,000 + 120,000 + 90,000 = $340,000.

## Common questions

### Where do probabilities come from?

Your CRM history: the share of deals at each stage that eventually closed won. Check the formula, example, and limitations on this page before using the result for a real sales decision.

### Commit vs weighted?

Commit forecasts are rep judgements; this is a statistical expected value. Check the formula, example, and limitations on this page before using the result for a real sales decision.

### Include only this period's deals?

Yes — only deals expected to close in the forecast period. Check the formula, example, and limitations on this page before using the result for a real sales decision.

### How do I use the Sales Forecast Calculator?

Enter the required values for Currency (symbol only, never converted), Stage 1 pipeline value, Stage 1 close probability (your figure), Stage 2 pipeline value (blank = none), Stage 2 close probability (your figure) (blank = none), and the other fields shown. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.

### What formula does the Sales Forecast Calculator use?

Forecast = Σ (stage pipeline value × stage close probability). The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone.

### Can the Sales Forecast Calculator be used for exact decisions?

Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.

## Limitations and assumptions

- Up to four stages.
- Expected value; actual results vary.
- Results are educational estimates built only from the figures you enter. They are not personalised investment, tax, legal or accounting advice. Rates, growth and discount assumptions are always yours to choose.
- The result depends on the values you enter for this sales forecast calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.

## Sources

- OpenStax — https://openstax.org/books/principles-marketing/pages/1-unit-introduction

## Cite this page

- APA: Free Calculator. (2026, October 15). Sales Forecast Calculator. https://freecalculator.tech/tools/sales-forecast-calculator
- MLA: "Sales Forecast Calculator." Free Calculator, 15 Oct. 2026, https://freecalculator.tech/tools/sales-forecast-calculator.
- Link: Sales Forecast Calculator — Free Calculator, https://freecalculator.tech/tools/sales-forecast-calculator