Forecast
A reasoned prediction of what's coming — sales, demand, revenue — that planning and budgeting hang on. And the verb for making it.
- Term
- Forecast
- Is
- A prediction of future values
- Of
- Sales, demand, revenue, traffic
- Read with
- Pipeline, budget, demand planning
Parts of speech & senses
- A prediction of future values — such as sales, demand, or revenue — based on historical data and assumptions. "The Q4 sales forecast guided inventory orders."
- A statement of expected future conditions, as in a weather forecast.
- To predict or estimate a future value or condition based on data and assumptions. "They forecast demand from the pipeline and seasonality."
Forms, tenses & usage
What a forecast is
A forecast is an informed estimate of the future — most often a number, like next quarter's sales, demand, revenue, or traffic, projected from historical data and explicit assumptions. It is the bridge between what has happened and the decisions that depend on what will happen: how much inventory to order, how much to budget, how many people to hire, what targets to set.
A forecast is a prediction, not a promise. Its quality depends on the data and assumptions behind it, and a good forecast states its assumptions and its uncertainty rather than presenting a single number as certain. The point is not to be exactly right but to be useful and honestly bounded.
How forecasts are used in marketing
In growth and marketing, forecasts drive resourcing and accountability. A sales forecast built from pipeline and conversion rates sets revenue expectations; a demand forecast shapes inventory and media flighting; a traffic or lead forecast sizes the funnel needed to hit a goal. Forecasts also become targets, which is where care matters: a forecast bent to match a desired number stops being a prediction and becomes wishful thinking that misleads the decisions it feeds.
The discipline is method and humility. Use the right approach for the horizon and data (from simple trend-and-seasonality models to pipeline-weighted or statistical methods), state assumptions, track forecast accuracy over time to improve it, and present ranges rather than false precision. A forecast you measure against actuals gets better; one you never check stays a guess.
Forecast as a verb and other senses
As a verb, to forecast is to make the prediction — 'forecast demand,' 'forecast the quarter.' Its past tense is usually 'forecast' (sometimes 'forecasted').
Outside business, forecast keeps the everyday sense of predicting future conditions, most familiarly the weather forecast. All senses share the idea of casting an estimate forward in time from current information.
Synonyms & antonyms
Synonyms
Antonyms
Origin & history
"Forecast" comes from Middle English forecasten, "to plan beforehand, contrive" (fore- "before" + casten "to cast, reckon"). The sense moved from contriving in advance to projecting or reckoning future conditions, keeping the core idea of casting an estimate forward in time.
Etymology: source.
Usage trends
Search interest for this term over the last five years:
Common questions
- What is a forecast?
- A data-based prediction of future values — such as sales, demand, or revenue — built from historical data and explicit assumptions, used to guide planning, budgeting, and resourcing.
- Is forecast a noun or a verb?
- Both. As a noun it is the prediction itself. As a verb, to forecast is to predict or estimate a future value (past tense usually 'forecast', sometimes 'forecasted').
- How do you make a forecast more reliable?
- State your assumptions, present a range rather than false precision, use a method matched to the horizon and data, and track forecast accuracy against actuals each period so the model improves over time.
Resources & people to follow
- referenceRGM analysis — definitions, senses, and usage verified per term
Curated, non-competitor resources verified per term.
Related training
Disciplines
Areas of marketing where forecast is a core concern: