Practical guide
Pace, sleep, BMR, TDEE and calories — how should estimates be read?
Health calculators describe mathematics and statistical equations, not health status. Treat a result as a reference for observation, never a diagnosis or individual recommendation.
Pace and sleep windows measure time
Running pace is average time per kilometre and does not show elevation or intensity changes. A sleep window is time between clocks, not measured sleep or quality.
Use the same measurement method for comparisons and do not draw medical conclusions from one result.
BMR, TDEE and a target are successive layers
BMR estimates resting expenditure with a population equation. TDEE applies an indicative activity level, while the calorie-needs tool adds an entered goal adjustment.
Each layer increases uncertainty. Body composition, illness, medication, pregnancy and actual activity can materially change needs.
Interpret estimates safely
Do not use the result as a minimum food intake or weight-loss plan without individual assessment. Seek professional help for eating disorders, illness or special needs.
Long-term observations of weight, wellbeing and performance are more informative than the apparent precision of one number.
Frequently asked questions
What does this guide explain about “Pace and sleep windows measure time”?
Running pace is average time per kilometre and does not show elevation or intensity changes. A sleep window is time between clocks, not measured sleep or quality. Use the same measurement method for comparisons and do not draw medical conclusions from one result.
What does this guide explain about “BMR, TDEE and a target are successive layers”?
BMR estimates resting expenditure with a population equation. TDEE applies an indicative activity level, while the calorie-needs tool adds an entered goal adjustment. Each layer increases uncertainty. Body composition, illness, medication, pregnancy and actual activity can materially change needs.
What does this guide explain about “Interpret estimates safely”?
Do not use the result as a minimum food intake or weight-loss plan without individual assessment. Seek professional help for eating disorders, illness or special needs. Long-term observations of weight, wellbeing and performance are more informative than the apparent precision of one number.
Calculators covered by this guide
Running pace calculator
Calculate average minutes per kilometre and running speed.
Sleep duration calculator
Calculate an overnight sleep window and compare it with your duration target.
Daily calorie needs calculator
Estimate daily energy from BMR, activity and a custom goal adjustment.
TDEE calculator
Estimate total daily energy expenditure from BMR and activity.
BMR calculator
Estimate resting daily energy expenditure for an adult.