Baby Room Temperature Calculator
Get sleep clothing guidance based on your nursery’s temperature, so your baby is neither too warm nor too cold overnight.
How it works
- Set the slider to your baby’s room temperature.
- Switch units between Fahrenheit and Celsius if needed.
- Read the recommendation for what to dress your baby in for sleep.
- Check for overheating signs using the guide further down, since a thermometer is a starting point, not the final word.
Signs your baby may be too warm
A quick check is to feel your baby’s chest or the back of their neck, not their hands or feet, which are naturally cooler. If your baby feels hot or sweaty, remove a layer rather than relying on the thermometer alone.
About this calculator
This tool follows a middle-ground version of the TOG-to-temperature guidance published by major sleep sack brands, since different manufacturers publish somewhat different charts. We cross-checked this against a leading brand’s own published chart and adjusted the mid-range bands to avoid recommending warmer sleepwear than necessary, since overheating is a more significant safe-sleep concern than a baby being slightly cool.
Room temperature is one input among several. Your baby’s age, what they are wearing underneath a sleep sack, and their individual temperature regulation all matter too. Always check the specific TOG rating and sizing guidance printed on your own sleep sack, since it may differ slightly from this general chart.
Frequently asked questions
Why do different sources give different TOG recommendations for the same temperature?
TOG-to-temperature charts vary somewhat by manufacturer, fabric, and fit, so there is no single universal standard. This tool reflects a moderate, middle-ground reading of published brand guidance rather than any one company’s exact numbers.
What is the ideal nursery temperature?
A range of about 68 to 72°F (20 to 22°C) is commonly recommended as comfortable for most babies, though this tool gives guidance across a wider range since not every nursery can be kept in that exact window.
What if my baby feels warm even though the room is cool?
Trust how your baby actually feels over the thermometer. Individual babies regulate temperature differently, and illness, extra layers underneath a sleep sack, or a heavier fabric can all make a baby warmer than the room temperature alone would suggest.