Flexibility Score Calculator
Flexibility is the fourth component of health-related physical fitness in the ACSM model, alongside cardiorespiratory endurance, muscular strength, and muscular endurance. The sit-and-reach test is the most widely used field test for flexibility because of its simplicity, reproducibility, and established normative database. By comparing your score against age-sex norms, you can assess whether your current flexibility is appropriate for your age and identify whether flexibility training should be prioritised. This calculator uses ACSM normative tables to classify your sit-and-reach distance and estimate the training needed to reach the next classification.
ACSM sit-and-reach norms (cm)
Male 20-29: Excellent 40+, Good 34-39, Average 28-33, Fair 23-27, Poor <23
Female 20-29: Excellent 42+, Good 37-41, Average 33-36, Fair 28-32, Poor <28
Male 30-39: Excellent 38+, Good 32-37, Average 26-31, Fair 21-25, Poor <21
Female 30-39: Excellent 40+, Good 34-39, Average 29-33, Fair 24-28, Poor <24
Frequently asked questions
What does the sit-and-reach test measure?
The sit-and-reach test primarily measures hamstring flexibility and secondarily measures lower back flexibility. The YMCA sit-and-reach protocol: sit with legs extended, feet flat against the box at 0cm. Reach forward with both hands, record the furthest point held for 2 seconds. Negative values mean you cannot reach your feet.
What is a good sit-and-reach score?
ACSM norms for adults aged 20-29: Excellent male 40+ cm, female 42+ cm; Good: male 34-39cm, female 37-41cm; Average: male 28-33cm, female 33-36cm; Fair: male 23-27cm, female 28-32cm; Poor: male below 23cm, female below 28cm. Scores decrease with age in sedentary individuals.
Can flexibility be improved at any age?
Yes. ACSM research confirms that flexibility can be improved at any age through a systematic stretching program. Adults in their 60s and 70s who complete 10 to 12 weeks of regular static stretching show sit-and-reach improvements of 3 to 5 cm on average. The rate of improvement is slower in older adults but the potential is real and clinically meaningful.
Does flexibility reduce injury risk?
The relationship between flexibility and injury risk is more complex than commonly assumed. Moderate flexibility appears optimal: hypermobile athletes (excessive range without proportional strength) actually have elevated injury risk in some sports. For most athletes, achieving functional range of motion adequate for their sport is the goal, not maximum flexibility.
What other flexibility tests exist?
Other validated flexibility tests include: shoulder flexibility test (overhead arm reach test), Thomas test for hip flexor tightness, ankle dorsiflexion test (lunge test), and spine extension tests. The ACSM recommends assessing flexibility at multiple joints rather than relying solely on the sit-and-reach, which only assesses the posterior chain.
Official sources
- American College of Sports Medicine: ACSM Guidelines for Exercise Testing and Prescription, 11th edition.
- YMCA of the USA: YMCA Fitness Testing Protocols.
Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026. See our methodology.