Built for Australian private practice

TDEE calculator for nutrition professionals

Estimate adult resting and daily energy expenditure with Mifflin–St Jeor. Compare kcal and kJ before setting a client’s meal-plan target.

Free to use · No signup

Your inputs

Start with this illustrative example, then replace the numbers with your own. Results update as you type.

Use a current measured weight.

Use measured height in centimetres.

Adults aged 18–100 only.

The original equation uses these two sex-specific constants.

Select a planning assumption; individual expenditure varies.

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Illustrative example result

Estimated daily energy (kcal/day)
2,004.75
Estimated daily energy (kJ/day)
8,387.87
Estimated resting energy (kcal/day)
1,458

For adult assessment support only. Not a measured energy requirement or an automatic weight-loss prescription. Not intended for children, pregnancy, breastfeeding or clinical conditions that need specialist assessment. Activity factors are estimates.

Turn your assessment into a client plan

Set client nutrition targets, build meal plans and keep consultation notes together in Notrispace.

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How the calculation works

Resting energy (kcal/day) = 10 × weight (kg) + 6.25 × height (cm) − 5 × age + sex constant (+5 male, −161 female). Resting energy is rounded to whole kcal. Daily energy = resting energy × activity factor. kJ = kcal × 4.184.

Worked example

For a 35-year-old woman at 70 kg and 175 cm, rounded resting energy is 1,458 kcal/day. With an activity factor of 1.375, estimated daily energy is 2,004.75 kcal or 8,388 kJ.

Source and methodExplore this workflow in Notrispace

Questions practitioners ask

What does the result mean?

Resting energy (kcal/day) = 10 × weight (kg) + 6.25 × height (cm) − 5 × age + sex constant (+5 male, −161 female). Resting energy is rounded to whole kcal. Daily energy = resting energy × activity factor. kJ = kcal × 4.184.

Who is this calculator for?

For nutritionists, dietitians and naturopaths supporting individual client assessment and planning. Example values are illustrative, not prescribed targets.

What are the limitations?

For adult assessment support only. Not a measured energy requirement or an automatic weight-loss prescription. Not intended for children, pregnancy, breastfeeding or clinical conditions that need specialist assessment. Activity factors are estimates.