Maintenance calories for a 300 lb man

A 30-year-old man weighing 300 lb at 5′10″ burns about 3,490 calories a day lifting four days a week with 7,500 to 10,000 daily steps, and about 2,790 with a desk job and little activity. To lose about 1.5 lb a week, eat around 2,740 a day.

Updated

About you

Body fat is optional.

Sex
years
lb
Height
ft
in
Training sessions a week

Your phone's weekly average is the honest number. Steps move your TDEE more than gym days do.

%

Adds Katch-McArdle and Cunningham, which work from lean mass instead of total weight.

Your TDEE

3,490kcal/day
BMR at rest (Mifflin-St Jeor)
2,325 kcal
Activity factor
×1.50

Calorie targets

Macros for cut

Protein
299 g
Carbs
215 g
Fat
76 g

Your BMR by formula

Without a body fat %, only Mifflin-St Jeor can run. With one, the lean mass formulas join in and Katch-McArdle sets your TDEE.

Mifflin-St Jeor2,325 kcal
Katch-McArdleNeeds body fat %
CunninghamNeeds body fat %

Your TDEE at each activity level

The classic multipliers most calculators use, applied to your BMR. Use it to sanity check the steps and sessions estimate above.

Activity levelMultiplierTDEE
SedentaryDesk job, little exercise×1.22,790 kcal
Lightly activeExercise 1 to 3 days a week×1.3753,200 kcal
Moderately activeExercise 3 to 5 days a week×1.553,605 kcal
Very activeHard exercise 6 to 7 days a week×1.7254,015 kcal
Extremely activePhysical job plus hard training×1.94,420 kcal

The calculator above starts at 300 lb. Change your age, height, steps and training days for your own number.

TDEE by height and activity at 300 lb

Worked out with Mifflin-St Jeor for a 30-year-old man. Find your height, then read across to how active you are.

TDEE by height and activity at 300 lb
HeightSedentaryLightly activeModerately activeVery activeExtremely active
5′4″2,6803,0703,4603,8504,240
5′6″2,7153,1103,5103,9054,300
5′8″2,7553,1553,5603,9604,360
5′10″2,7903,2003,6054,0154,420
6′0″2,8303,2453,6554,0704,480
6′2″2,8703,2853,7054,1254,540
6′4″2,9053,3303,7554,1804,600

Calories to cut, maintain or bulk at 300 lb

Targets for a 30-year-old man at 5′10″ who lifts four days a week and walks 7,500 to 10,000 steps a day, with the pace set as a share of bodyweight.

Calories to cut, maintain or bulk at 300 lb
GoalCalories a dayWeekly change
Fast cut2,370−2.25 lb
Cut2,740−1.5 lb
Slow cut3,115−0.75 lb
Maintain3,490None
Lean bulk3,865+0.75 lb

TDEE by age at 300 lb

The formula takes 5 calories a day off resting energy for every year of age, so the same body burns a little less each decade. Worked out at 5′10″.

TDEE by age at 300 lb
AgeBMRSedentaryModerately active
20 years2,3752,8503,685
30 years2,3252,7903,605
40 years2,2752,7303,530
50 years2,2252,6703,450
60 years2,1752,6103,375

How much protein at 300 lb

Most of the research on lifters lands between 1.6 and 2.2 g of protein per kilogram of bodyweight a day. At 300 lb that is 218 to 299 g a day, with the top of the range most useful during a cut.

Other bodyweights

TDEE Calculator

Frequently asked questions

How many calories should a 300 lb man eat to lose weight?

Start from maintenance and take off enough to lose about 0.5% of bodyweight a week. For a 30-year-old man at 5′10″ who lifts four days a week, maintenance is about 3,490 calories, so a cut sits near 2,740 a day. Weigh in daily, compare weekly averages, and adjust by 100 to 150 calories if the trend is off after two to three weeks.

How many calories should a 300 lb man eat to build muscle?

A lean bulk gains about 0.25% of bodyweight a week, which at 300 lb is a surplus of about 375 calories a day. That puts a man at 5′10″ who lifts four days a week near 3,865 calories a day, with 218 to 299 g of protein.

How many calories does a 300 lb man burn at rest?

At rest, a 30-year-old man at 5′10″ and 300 lb burns about 2,325 calories a day: that is the BMR. With a desk job and little exercise, the total for the day is about 2,790 calories.