6 Minute Walk Test Calculator
Enter patient demographics and measured six-minute walk distance to compare against predicted norms (Enright & Sherrill). This tool assists cardiopulmonary rehab, heart failure, and pulmonary hypertension assessments.
How to Use This Calculator
Collect test data
Measure patient height, weight, age, sex, and the actual distance walked during the standard six-minute walk test.
Enter inputs
Fill in the patient demographics and the distance value. The tool uses validated prediction equations specific to sex.
Interpret the percentage
Compare the patient’s actual distance with the predicted reference to gauge functional capacity and guide rehabilitation or further evaluation.
Formula
Predicted six-minute walk distance (Enright & Sherrill):
- Men: 6MWD = (7.57 × height_cm) − (5.02 × age) − (1.76 × weight_kg) − 309
- Women: 6MWD = (2.11 × height_cm) − (2.29 × weight_kg) − (5.78 × age) + 667
% predicted distance = (Actual distance ÷ Predicted distance) × 100
Full Description
The six-minute walk test (6MWT) is a practical assessment of submaximal aerobic capacity, widely used in cardiopulmonary rehabilitation, chronic obstructive pulmonary disease (COPD), pulmonary hypertension, and heart failure management. Predicted reference values account for age, sex, height, and weight to contextualize performance.
Clinicians integrate 6MWT results with oxygen saturation, dyspnea scores, heart rate response, and clinical history. Repeated tests track functional improvement following therapy or deconditioning. A meaningful clinical improvement is typically ≥30 meters (98 ft).
Frequently Asked Questions
Can I use this calculator for patients on supplemental oxygen?
Yes. Specify whether oxygen was used for serial tests to ensure fair comparisons. Document flow rates and delivery method.
What if the patient used a walking aid?
Aids are permitted but should remain consistent across repeat evaluations. Reference equations were derived without aids, so interpret results with clinical judgment.
How frequently should the 6MWT be repeated?
In rehabilitation programs, tests are often repeated every 4–12 weeks to monitor progress. Acute changes (e.g., new symptoms) may warrant earlier reassessment.
Is there a learning effect?
Yes. Performance may improve slightly on the second test. When feasible, perform a practice walk to minimize learning bias in formal assessments.