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Free Sleep Tools

Science-backed calculators and quizzes to help you sleep better, built by the WantMattress team.

Published byWantMattress editorial team

Each tool uses published sleep research and is free to use, no sign-up required.

Sleep cycle calculator

Find the best time to go to bed or set your alarm based on 90-minute sleep cycles. Adjusted for your age group.

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Sleep debt calculator

Work out how much sleep you owe your body and get a realistic plan to pay it back.

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Chronotype quiz

Find out whether you are a morning lark, night owl, or somewhere in between.

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Mattress cost-per-night calculator

See the real nightly cost of any mattress so you can compare value, not just price tags.

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Bedroom environment scorer

Score your bedroom setup and get practical tips to make it better for sleep.

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Mattress replacement calculator

Answer a few questions about your mattress to find out if it is time for a new one.

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Pillow height calculator

Get the right pillow height for your sleeping position and body type.

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