BMR Reference for Age 41
Basal metabolic rate at age 41 is not one number — it is a range set by height and weight. This page holds the formula inputs steady at age 41 and sweeps body composition instead: four BMI levels, men at 175 cm and women at 165 cm, each estimated with both Mifflin-St Jeor and Harris-Benedict so the spread between the classic equations is visible at a glance.
Read the BMI-25 row as a worked example: 76.6 kg at age 41 returns 1660 kcal, 5 kcal below the 40-year figure of 1665. Harris-Benedict lands 62 kcal above Mifflin (3.7%), and moving from sedentary to extra active multiplies the same estimate out to 3,154 kcal — a 1,162 kcal swing next to the 310 kcal the age term costs between 18 and 80.
BMR at age 41 by body composition
| BMI | Men (175 cm) | Women (165 cm) | ||||
|---|---|---|---|---|---|---|
| Weight | Mifflin | Harris | Weight | Mifflin | Harris | |
| 20 | 61.3 kg | 1507 kcal | 1517 kcal | 54.5 kg | 1210 kcal | 1285 kcal |
| 25 | 76.6 kg | 1660 kcal | 1722 kcal | 68.1 kg | 1346 kcal | 1411 kcal |
| 30 | 91.9 kg | 1813 kcal | 1927 kcal | 81.7 kg | 1482 kcal | 1537 kcal |
| 35 | 107.2 kg | 1966 kcal | 2132 kcal | 95.3 kg | 1618 kcal | 1662 kcal |
From BMR to daily burn: TDEE at age 41
Multiplying BMR by an activity factor gives total daily energy expenditure. The factors below are the same five levels the main calculator offers, applied to the BMI-25 man from the table (76.6 kg, BMR 1660 kcal):
| Activity level | Factor | TDEE |
|---|---|---|
| Sedentary — little or no exercise | ×1.2 | 1992 kcal/day |
| Lightly active — 1–3 days/week | ×1.375 | 2283 kcal/day |
| Moderately active — 3–5 days/week | ×1.55 | 2573 kcal/day |
| Very active — 6–7 days/week | ×1.725 | 2864 kcal/day |
| Extra active — intense daily training | ×1.9 | 3154 kcal/day |
Get your own figure
Body size matters more than any reference table can capture, so a two-minute personal estimate is usually worth more than a row of averages. Enter your numbers and the box computes the Mifflin-St Jeor result with the same coefficients used across this site:
Frequently asked questions
What is the BMR of a 41-year-old?
It depends on body size as well as age. At age 41, a 175 cm man weighing about 76.6 kg has a Mifflin-St Jeor BMR of roughly 1660 kcal per day, while a 165 cm woman at 68.1 kg lands near 1346 kcal per day. The table above shows how the estimate moves across four common body-composition levels.
Why does BMR fall as age increases?
The Mifflin-St Jeor equation subtracts 5 kcal for every year of age, so between age 20 and age 80 the estimate drops by about 300 kcal per day at the same height and weight. The coefficient is a population average: body composition, not the birthday itself, drives most of the real change.
Mifflin-St Jeor or Harris-Benedict — which should I use?
Mifflin-St Jeor is the default on this site because validation studies found it tracks measured resting energy expenditure more closely for most adults. Harris-Benedict, shown beside it in the table, runs higher for many people — often by 5 to 10 percent — so comparing the two columns is a quick way to see the uncertainty band around any single number.
Nearby ages
Want the full picture — Katch-McArdle from body-fat percentage, the age chart and TDEE in one run? Open the BMRScope calculator or browse every age page.