Enter your sit-and-reach test measurement to get your hamstring and lower-back flexibility rating, based on the classic sit-and-reach protocol.
Results
Calculated
Flexibility rating
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Sit-and-reach category for your sex
Reach distance (cm)
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Past toes, in centimeters
Reach distance (in)
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Past toes, in inches
Vs. typical average
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Compared to the average band for your sex
Ready
Enter your sit-and-reach measurement and press Calculate.
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How the sit-and-reach flexibility test works
This calculator uses the classic sit-and-reach test, the most widely used field test for hamstring and lower-back flexibility. Sit on the floor with your legs straight out in front of you and your feet flat against a wall or box. Keeping your knees straight (no bouncing), reach forward along your legs as far as you comfortably can and hold the position for a moment. Measure the distance your fingertips travel past your toes — enter that distance as a positive number, or as a negative number if your fingertips fall short of your toes.
The formula
The raw score is simply the reach distance itself, converted between centimeters and inches (1 in = 2.54 cm) so you can read it either way. That score is then compared against general adult reference bands, which are set separately for men and women because women typically show several centimeters more reach than men on this test — a well-documented average difference in hip and hamstring flexibility. Reference midpoints used for the "average" band are +5 cm for women and -3 cm for men; your "vs. typical average" result shows how far above or below that midpoint you landed.
Interpreting the results
A larger positive number means greater flexibility through the hamstrings, calves, and lower back. A negative number is common and simply means your fingertips did not reach your toes — it is not a diagnosis of anything, just a starting measurement to track over time. Flexibility responds well to consistent stretching, so retesting every few weeks after a stretching routine is a good way to see progress.
Frequently Asked Questions
What is the sit-and-reach test measuring?
It measures the combined flexibility of your hamstrings (back of the thighs), calves, and lower back — the muscle groups that let you bend forward at the hips with straight legs. It does not measure flexibility elsewhere in the body, such as the shoulders or hips in other directions.
Why do the rating bands differ for men and women?
On average, women score higher on the sit-and-reach test than men, largely due to differences in pelvic structure and typical hamstring length relative to torso length. Using the same bands for both sexes would rate a typical woman's score too generously and a typical man's score too harshly, so the reference midpoints are set separately.
What if my fingertips don't reach my toes?
A negative score is very common, especially without a regular stretching habit, and is not a medical problem by itself. It simply places you in a lower flexibility band for this specific test. Gentle, consistent stretching of the hamstrings and lower back over several weeks typically improves the score.
Are these calculations medically accurate?
This calculator applies the standard sit-and-reach measurement and general adult reference bands for screening and fitness-tracking purposes. It is not a diagnostic tool. If you have pain, a suspected injury, or a medical condition affecting mobility, consult a physical therapist or physician before testing or stretching.