Calculators
Quick HRV calculators
Each one takes a minute and gives you one plain answer.

What does last night's HRV mean?
Last night's number and your device in. Where it sits, and a call for today.

What is your normal range?
Up to two weeks of nights in. Your usual range, your 7-day average, and whether last night is low for you.

Check your Garmin HRV Status
Your band from Garmin Connect and seven nights in. Inside or outside, and by how many ms.

How much do tonight's drinks move it?
Tonight's drinks against your usual, and when the last one is. The WHOOP study's figure for that night.
Connect your ring or watch, and Gyroscope shows every night's HRV against your own normal, with your sleep and drinks right beside it. Open Gyroscope