How do I perform the sit-and-reach test?

Sit on the floor with your legs fully extended and feet flat against a box or wall. Without bending your knees, slowly reach both hands forward as far as possible along the measuring tape and hold for 1–2 seconds. Record the farthest point your fingertips reach. The standard "0" reference point is typically at the feet (box edge), so values beyond your feet are positive and values short of your feet are negative.

What is a good sit-and-reach score?

Norms vary by age and sex. On the feet-at-zero scale used by this calculator, average reach for adults in their 20s–30s centers near the toes: roughly -3 to +5 cm (-1 to +2 in) for men and +2 to +10 cm (+1 to +4 in) for women. Scores above these ranges are above average. (On traditional boxes where the footplate is set at 26 cm, these same average ranges correspond to box readings of 23–31 cm and 28–36 cm.) Use the calculator for your age- and sex-specific rating.

Should I warm up before the test?

Yes. A 5–10 minute warm-up (light cardio and dynamic leg swings) significantly improves sit-and-reach distance and reduces injury risk. Test results are most comparable when warm-up conditions are consistent across sessions.

Where do the norms come from?

The reference values are based on published sit-and-reach norm tables from the Canadian Physical Activity, Fitness and Lifestyle Approach (CPAFLA) and ACSM's Guidelines for Exercise Testing and Prescription, stratified by age group and sex. They represent approximate population percentile thresholds for apparently healthy adults.

Can flexibility improve with training?

Yes. Static stretching held for 30–60 seconds and repeated 2–4 times per session, performed 3–5 days per week, reliably improves sit-and-reach scores over 4–12 weeks. Yoga and Pilates also show consistent flexibility gains. Re-test every 6–8 weeks to track progress.

Does the calculator work for the "back-saver" or V-sit versions?

The standard sit-and-reach (both legs extended) is what this calculator targets. The back-saver version (one leg bent) and the V-sit reach produce slightly different values and have separate norm tables not reflected here. Use those versions' specific norms for accurate comparison.

Flexibility Score Calculator

Enter your sit-and-reach distance and age to get a flexibility score, percentile rank, and rating compared to population norms.

Your Measurements

Sex

Age Group

Unit

Sit-and-Reach Distance (cm)

Positive = past feet; negative = short of feet

Enter your sit-and-reach distance to see your flexibility score

Flexibility Percentile

th percentile

0 25th 50th 75th 100th

Reference Norms —

Rating	Percentile	Min. Distance (cm)

Values approximate population norms (CPAFLA / ACSM reference tables). Your measurement: .

Summary

The sit-and-reach test is the most widely used field test for measuring lower-back and hamstring flexibility. You sit on the floor with legs extended and reach forward as far as possible along a measuring box or tape. This tool compares your best reach distance to age- and sex-stratified norms derived from large fitness databases including the Canadian Physical Activity, Fitness and Lifestyle Approach (CPAFLA) and ACSM reference tables. Enter your measurement in centimeters or inches to see your percentile rank and classification.

How it works

Select your sex — male and female norms use separate reference tables.
Choose your age group from the age brackets available.
Enter your best sit-and-reach distance in centimeters or inches.
The tool looks up your value against the norm table for your group.
Results display your percentile rank, classification, and a visual bar showing where you sit in the distribution.

Use cases

Athletes assessing lower-body flexibility before and after a stretching program.
Personal trainers establishing a baseline flexibility score for new clients.
Physical education teachers grading students on standardized fitness tests.
Older adults tracking hamstring and lower-back mobility over time.
Anyone who recently took a sit-and-reach test and wants context for their result.
Coaches identifying athletes who may benefit from targeted flexibility work.

Frequently Asked Questions

Last updated: 2026-06-19 · Reviewed by Nham Vu