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.

Ruler drop

How far the ruler fell before you caught it.

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

Ruler drop

  1. Ask a partner to hold a ruler vertically, with the zero mark at the bottom.
  2. Open your thumb and finger around the zero mark. Do not touch the ruler.
  3. Ask your partner to drop the ruler without warning.
  4. Catch the ruler as fast as you can.
  5. Read the mark at your thumb. That is the distance the ruler fell.
  6. Repeat three times and take your best catch.
  7. Enter the distance in inches or centimetres.

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.