FOAMNIGHTS
Better sleep, by design — mattresses, foam, and the science of rest.
From timing your sleep cycles and tracking sleep debt to checking your sleep efficiency, sizing a mattress, finding your ideal firmness, and setting a caffeine cutoff, FoamNights pairs free hands-on sleep calculators with practical guides and a richly illustrated museum. Sleep smarter, rest deeper.
Sleep & Mattress Calculators
Free tools for better rest — sleep cycle calculator, sleep debt calculator, sleep efficiency calculator, mattress size calculator, mattress firmness finder, and caffeine cutoff calculator.
Sleep Cycle Calculator
Find the best time to go to bed or wake up by counting back in ~90-minute sleep cycles, so you wake at the end of a cycle and feel less groggy
Sleep Debt Calculator
Add up the hours you slept this week against your target to see your accumulated sleep debt or surplus and your average nightly sleep
Sleep Efficiency Calculator
Work out the share of time in bed you actually spent asleep from your time in bed, time to fall asleep, and minutes awake during the night
Mattress Size Calculator
Look up standard US mattress dimensions in inches and centimetres, surface area, suggested sleepers, and a comfortable minimum room size
Mattress Firmness Finder
Get a suggested mattress firmness on a 1–10 scale from your sleep position and body weight to anchor your mattress shortlist
Caffeine Cutoff Calculator
Find the latest time to stop drinking coffee before bed, using caffeine's half-life to estimate when the dose decays to a sleep-friendly level
Sleep & Mattress Museum
Wander an immersive museum of the things that shape a good night’s rest — mattress types like memory foam, latex, innerspring, and hybrid alongside pillows, toppers, and bedding, each in its own gallery, so you can get to know the materials behind every great sleep: how they are made, what makes each one matter, and the role they play in building deep, restorative, lasting rest.
Tour the museum →From the Journal
Fresh guides on mattress types, firmness and sleep positions, sleep cycles and hygiene, bedding and toppers, and building deeper, more restorative rest.
The Ultimate Mattress Buying Guide for FoamNights Enthusiasts and Sleep Savvy Shoppers
The Ultimate Mattress Buying Guide for FoamNights Enthusiasts and Sleep Savvy Shoppers In an era where sleep quality has become a cornerstone of wellness, choosing the right mattress is no…
What Influences Foam Mattress Durability?
The Longevity of Foam Mattresses: Understanding Durability Factors and Lifespan Expectations Foam mattresses have become a popular choice for sleepers seeking comfort and support without compromising quality. However, understanding their…
The Green Sleep Revolution: How Eco-Friendly Mattresses Are Transforming Your Nightly Rest
The Green Sleep Revolution: How Eco-Friendly Mattresses Are Transforming Your Nightly Rest In an era where sustainability is no longer optional but essential, the mattress industry has undergone a remarkable…
The Science Behind Sleep Hygiene: Transforming Your Nights Into Restorative Retreats
The Science Behind Sleep Hygiene: Transforming Your Nights Into Restorative Retreats Sleep is often overlooked as a simple biological necessity, but its impact extends far beyond mere rest. Good sleep…
Understanding the Science Behind Pillow Reviews
The Ultimate Pillow Review Deep Dive: Finding Your Perfect Sleep Companion In an era where sleep quality has become a top priority, choosing the right pillow can feel as complex…
The Ultimate Guide to Elevating Your Sleep Experience with Premium Luxury Bedding
The Ultimate Guide to Elevating Your Sleep Experience with Premium Luxury Bedding In today’s fast-paced world, the pursuit of restful sleep has become both a necessity and a luxury. For…
Keep Learning
Practical know-how on mattress types, firmness, and sleep positions, plain-language explainers on sleep cycles and sleep hygiene, and bedroom-environment tips, plus a sleeper-friendly bedding glossary — everything you need to dig deeper and sleep smarter.
Visit the Learn hub →