Survey length calculator

Estimate how long your survey takes before you launch it. Length affects the completion rate, the quality of answers and the cost of fieldwork.

Survey length — the approximate time a respondent spends on all questions, instructions and final screens.

Calculation FAQ

Survey structure

Closed questions

Single choice, scales, yes/no

Open-ended questions

Require typing text

Matrices / statement grids

Each matrix counts as heavier than a regular question

Seconds per closed question

Usually 8–15 seconds

Seconds per open question

Usually 35–90 seconds

Seconds per matrix

Depends on the number of rows

Intro and outro, seconds

Instructions, consent, final screen

Time to complete

—

Result

minutes

Interpretation

Change the inputs to recalculate.

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Data is not stored — calculation runs in your browser.

How the completion time is calculated

Formula

Total time = closed questions × seconds + open questions × seconds + matrices × seconds + intro and outro.

Up to 3 minutes

Good for quick customer feedback and post-purchase surveys.

4–8 minutes

Fine for product and HR surveys when questions are clear and there are no unnecessary matrices.

10+ minutes

The risk of unfinished surveys and careless answers grows, especially without an incentive.

Calculation examples

1 Post-purchase survey

8 closed

1 open

no matrices

Usually fits into 2–3 minutes and barely lowers the completion rate.

2 Employee engagement survey

25 closed

3 open

4 matrices

With the default timings the survey takes about 10 minutes. Split the topics or remove repeated questions.

What to avoid

Treating all questions as equal A 12-row matrix and a yes/no question put a very different load on the respondent.
Not testing on mobile Matrices and long scales take longer on a phone.
Forgetting the screener If there are screening questions, account for them separately for everyone you invite.

Frequently asked questions

What survey length is normal?

For customer feedback, 1–4 minutes is best. For research, 6–10 minutes is acceptable when the topic is relevant and there is an incentive.

Why are long surveys worse?

More people drop out, the rest click through options faster and answer open questions worse.

How can I shorten a survey?

Remove just-in-case questions, merge similar scales, use display logic and ask open questions only of the segments that need them.

How many open questions can I include?

For short feedback, usually 1–2. Longer research can have more, but only if someone will actually analyze the answers.

Should I show a progress bar?

Yes, unless the survey is very short. A progress bar sets expectations but will not save an overloaded survey.

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