Time Under Tension Calculator
Total seconds your muscles work during a set, based on tempo.
Your result
Time under tension is one of several factors for muscle growth. Use a tempo you can control with good form.
Medical disclaimer: This tool is for education and is not medical advice. Read more.
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Frequently asked questions
What does the Time Under Tension Calculator do?
Total seconds your muscles work during a set, based on tempo. Enter your values and the result and chart update instantly.
How accurate is it?
It uses published, widely used formulas. Results are estimates for education and planning, not a diagnosis. Talk to a qualified clinician about decisions affecting your health.
Is my information stored or shared?
No. All calculations run in your browser and nothing you type is sent to a server or saved.
What can I search to find this tool?
People find it by searching for: time under tension; lifting tempo calculator; slow reps timing.