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Text & chat prompt

Estimate your market size sensibly

Estimate your market size sensibly: a free, copy-paste prompt for ChatGPT, Gemini and Claude. Paste the prompt and replace each [BRACKETED] field with your own details.

Text & chatChatGPTGeminiClaude

The prompt

Help me estimate the market size for [PRODUCT] in [COUNTRY OR REGION].

Customer type: [WHO BUYS]
Price per customer per year: [PRICE]
What I know: [ANY DATA]

Do a bottom-up estimate (number of customers times price) and a top-down cross-check. List every assumption, give low, likely and high cases, and tell me which assumption matters most.
Copy & open ChatGPTCopy & open GeminiCopy & open Claude Customise in the builder

Pro tip: Label every assumption clearly. Investors trust a transparent guess more than a huge number.

How to use this prompt

  1. Open ChatGPT and start a new chat.
  2. Paste the prompt.
  3. Replace each [BRACKETED] field with your real details and paste in your own text where asked.
  4. Reply with follow-ups such as "make it shorter" or "make it sound more like me".

Prompt at a glance

Category
Text & chat
Works with
ChatGPT · Gemini · Claude
Length
56 words
Fields to fill in
PRODUCT, COUNTRY OR REGION, WHO BUYS, PRICE, ANY DATA
Last updated

Frequently asked questions

Which AI tools work with this prompt?

It is written for ChatGPT, Gemini and Claude. Paste it into your preferred tool and adjust the wording if the result is off.

What do I need to fill in?

Replace these fields before you send it: PRODUCT, COUNTRY OR REGION, WHO BUYS, PRICE, ANY DATA. Each field shows an example in the prompt.

Should I paste private information into the prompt?

Only what the task needs. Remove names, contact details and other sensitive data before pasting a resume or document into any AI tool.

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