Immortals

Bio Age

Six tests.One number.

Do six simple tests at home, then enter your results here. You get an age for each test, and one Bio Age overall.

About you

Your age
Birth sex
Units

Your tests

Every test is optional. Fill in the ones you have done.

Reaction time

Your average from an online reaction time test.

Grip strength

Best of three squeezes on a hand dynamometer.

Push-ups

Full push-ups in one continuous set, to failure.

Sit-and-reach

How far past your toes you reach, sitting with legs straight.

One leg stand

Seconds balanced on one leg with your eyes closed.

Sit-to-stand

Your score out of 10 on the sit-to-stand test.

Enter your age and at least one test result. Your Bio Age appears here.

How to test

Reaction time

  1. Open an online reaction time test.
  2. Click or tap as soon as the signal appears.
  3. Repeat the test several times.
  4. Enter your average time in milliseconds.

Grip strength

  1. Hold a hand dynamometer in one hand.
  2. Squeeze the dynamometer as hard as you can.
  3. Repeat the squeeze three times.
  4. Enter your best result in pounds or kilograms.

Push-ups

  1. Get into a push-up position.
  2. Do full push-ups without a break.
  3. Stop when you cannot do another full push-up.
  4. Enter the number of push-ups you completed.

Sit-and-reach

  1. Sit on the floor with your legs straight.
  2. Reach forward past your toes.
  3. Measure the distance past your toes in inches or centimeters.
  4. If you cannot reach your toes, enter a negative number.

One leg stand

  1. Stand on one leg.
  2. Close your eyes.
  3. Start a timer the moment you lift your foot.
  4. Stop the timer the moment you lose your balance.
  5. Enter the number of seconds you balanced.

Sit-to-stand

  1. Sit down on the floor from standing.
  2. Stand up again, using as little support as you can.
  3. Start your score at 10 points.
  4. Subtract one point for each hand or knee you use for support.
  5. Enter your final score.

How it works

Each test result maps to an age. The mapping uses reference data for your test and your birth sex.

Your Bio Age is the average of those ages, together with your real age.

More completed tests give you a closer estimate.

The reference data comes from Bryan's Bio Age test. Some values at the extremes are extrapolated.