Sit and Reach Test Calculator
The sit and reach measures how far you can reach past your toes from a long-sitting position — mostly hamstring and low-back range of motion. This calculator uses the toe line as zero, so reaching 4 inches past your feet is entered as +10 cm and stopping 2 inches short is −5 cm.
Flexibility level
Average
Running the test
- Shoes off. Sit with legs straight and the soles of both feet flat against the box or step. Knees stay locked and pressed to the floor — a partner may hold them down.
- Stack one hand on the other, palms down, and reach forward along the measuring line. Keep the fingertips level; one hand creeping ahead of the other invalidates the trial.
- Take a couple of practice reaches, then hold the final position for one to two seconds while the distance is read. No jerking into the stretch.
- Record to the nearest half centimeter.
The zero point is the whole ballgame
This is where sit-and-reach numbers copied between sources quietly go wrong. There is no single ruler:
| Protocol | Where the toe line sits | A reach 5 cm past the toes reads |
|---|---|---|
| This calculator, and the U.S. Navy version | 0 cm | +5 cm |
| President’s Challenge box | 23 cm (9 inches) | 28 cm |
| Canadian trunk forward flexion, the box behind the ACSM tables | 26 cm | 31 cm |
Same body, same reach, three different numbers. Research groups using the Canadian setup say so explicitly — one describes “the ‘zero point,’ where the participant’s fingertips reach as far as their feet, was set at 26 cm.” So if you find a chart online where “average” is around 30 cm, that chart is not measuring what this page measures; it is offset by 26. Converting between the 23 cm and 26 cm boxes is a 3 cm shift; converting from either to a toe-line-zero ruler is a subtraction of the whole offset.
Before you compare your score to anything, check which ruler the table was built on.
What moves the result besides flexibility
Arm-to-leg proportion is the big one: long arms and short legs buy centimeters that have nothing to do with tissue extensibility, which is why the modified sit and reach exists — it resets zero to each person’s own seated reach. Beyond anatomy, the score drifts with time of day, room temperature, how recently you trained and whether you warmed up. None of that is noise you can remove; it is noise you standardize by repeating the test the same way.
Reading the band you get
The five-band scale this calculator prints is a coaching reference range, not a society norm — see the sit and reach norms by age page for who published it and what the age-graded alternative looks like. Use it as a rough position, then track your own number across 8 to 12 week blocks of mobility work.
For the other capacities in the battery, go back to the fitness test calculator or read how flexibility differs from strength, endurance and power.
This content is informational and does not replace evaluation by an exercise professional.
Frequently asked questions
How do you perform the sit and reach test?
Sit on the floor with shoes off and legs straight, soles flat against the box, knees locked down. Hands stacked or side by side, palms down, reach forward along the measuring line and hold for one to two seconds. No bouncing.
Where is zero on the ruler?
On this calculator, zero is the tips of your toes: negative means you did not reach your feet, positive means you went past them. Other protocols move zero back so the toe line reads 23 cm or 26 cm, and their numbers are not interchangeable with these.
Should I warm up first?
Most published sit-and-reach reference data assume no prior warm-up, so warming up will flatter your score relative to the table. Whatever you choose, keep it identical every time you retest.
What does the test actually measure?
Combined range of motion at the hips and lumbar spine, dominated by hamstring extensibility. It says nothing about shoulder, thoracic or ankle mobility, and long arms relative to legs inflate the score independently of flexibility.
Is a low score a health problem?
Not on its own. The federal physical activity guidelines include flexibility work while stating plainly that its health benefits are unknown and that it is unclear whether it reduces injury risk.
Sources
- Sit and Reach Test — protocol and measurement variations. Topend Sports
- Proyer RT, Gander F, Bertenshaw EJ, Brauer K. The Positive Relationships of Playfulness With Indicators of Health, Activity, and Physical Fitness. Front Psychol 9:1440, 2018 (sit-and-reach zero point set at 26 cm)
- Physical Activity Guidelines for Americans, 2nd edition. U.S. Department of Health and Human Services, 2018
Written by Lucas Silva · Reviewed by Lucas Silva · Updated on August 15, 2026