Man aged 30, low active
- Details
- Male, 30 years; height 175 cm, weight 70 kg; low active
- Result
- 2,755 kcal a day; BMR 1,676 kcal a day
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Result
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How it is calculated
- Calories used per day (TDEE) are calculated with the adult equations in Table 5-16 of Dietary Reference Intakes for Energy (National Academies, 2023). For adults whose weight is stable, the estimated energy requirement (EER) equals the calories used per day.
- Activity levels follow the ranges in Table 5-4 of the same report (PAL = calories used per day ÷ basal metabolism): Inactive PAL 1.00 to under 1.53; Low active PAL 1.53 to under 1.68; Active PAL 1.68 to under 1.85; Very active PAL 1.85 to under 2.50.
- Basal metabolic rate (BMR) uses the Schofield equations adopted in Table 5.2 of Human energy requirements (FAO/WHO/UNU, 2004), from weight and age group only. The National Academies report also used these equations where BMR was not measured.
- Calories per day and BMR are estimated with separate equations from the two sources. Calories per day are not BMR multiplied by an activity factor.
- When feet, inches and pounds are used, 1 inch = 2.54 cm and 1 pound = 0.45359237 kg. 1 kcal = 4.184 kJ. Results are rounded to whole numbers.
- The equations apply to adults aged 19 and over who are not pregnant or breastfeeding. They are estimates from population data, and your actual needs may be higher or lower. This tool does not give weight-loss or diet advice and does not replace an assessment by a doctor or dietitian.
- All calculations are done in your browser. The details you enter are not sent to any server.
Equations for calories used per day (kcal/day)
Men
| Activity level | Equation |
|---|---|
| Inactive | 753.07 − 10.83 × age + 6.50 × height + 14.10 × weight |
| Low active | 581.47 − 10.83 × age + 8.30 × height + 14.94 × weight |
| Active | 1,004.82 − 10.83 × age + 6.52 × height + 15.91 × weight |
| Very active | −517.88 − 10.83 × age + 15.61 × height + 19.11 × weight |
Women
| Activity level | Equation |
|---|---|
| Inactive | 584.90 − 7.01 × age + 5.72 × height + 11.71 × weight |
| Low active | 575.77 − 7.01 × age + 6.60 × height + 12.14 × weight |
| Active | 710.25 − 7.01 × age + 6.54 × height + 12.34 × weight |
| Very active | 511.83 − 7.01 × age + 9.07 × height + 12.56 × weight |
National Academies (2023), Table 5-16, for ages 19 and over. Age is in years, height in cm and weight in kg.
Equations for basal metabolic rate (kcal/day)
| Age | Men | Women |
|---|---|---|
| 18 to under 30 | 15.057 × weight + 692.2 | 14.818 × weight + 486.6 |
| 30 to under 60 | 11.472 × weight + 873.1 | 8.126 × weight + 845.6 |
| 60 and over | 11.711 × weight + 587.7 | 9.082 × weight + 658.5 |
FAO/WHO/UNU (2004), Table 5.2 (Schofield equations). Weight is in kg.
Worked examples
Woman aged 25, inactive
- Details
- Female, 25 years; height 160 cm, weight 55 kg; inactive
- Result
- 1,969 kcal a day; BMR 1,302 kcal a day
Woman aged 45, active
- Details
- Female, 45 years; height 165 cm, weight 68 kg; active
- Result
- 2,313 kcal a day; BMR 1,398 kcal a day
Man aged 65, inactive
- Details
- Male, 65 years; height 170 cm, weight 75 kg; inactive
- Result
- 2,212 kcal a day; BMR 1,466 kcal a day
Man aged 40, active (feet and pounds)
- Details
- Male, 40 years; height 5 ft 10 in, weight 180 lb; active
- Result
- 3,030 kcal a day; BMR 1,810 kcal a day
Official sources
Applies to: Current (National Academies, Dietary Reference Intakes for Energy, 2023; FAO/WHO/UNU, Human energy requirements, 2004).
- National Academies of Sciences, Engineering, and Medicine: Dietary Reference Intakes for Energy (2023), Chapter 5, Tables 5-4 and 5-16
- FAO, WHO and UNU: Human energy requirements (2004), Chapter 5, Table 5.2
- U.S. Department of Agriculture and U.S. Department of Health and Human Services: Dietary Guidelines for Americans, 2025–2030
Last reviewed on 31 October 2026.
The rules on this page have been checked against the official sources listed above. The result is for reference. The rules and assessment of the concerned authority shall prevail.