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TDEE Calculator for Athletes

Athletes often need more food than lifestyle calculators suggest — and still get hurt by stacking wearable burn on top. This page biases toward higher activity and prioritises fueling performance over aggressive cutting in-season.

In-season
fuel > cut
Extra/Very
common tiers
Team + gym
count the whole week
Pro support
when available

Your stats

Standard inputs first — the age adjustment is applied below.

Biological sex
yrs
lb
Height
ft
in
%

Season phase

Energy availability should rise with load.

No change
Phase

No extra adjustment on a high-activity base.

Estimates are typically within ±10%. Track your weight for two weeks and adjust by 100–200 kcal.

The context

Athlete TDEE is energy availability

Low energy availability impairs training, immunity and hormones. A calculator estimate is a start; ongoing fatigue, missed periods, stalled performance or frequent illness are signals to eat more and get professional help.

Body-composition goals belong mostly in off-season. In-season, most athletes should sit at or above true needs.

Why the formula drifts

High-performance constraints

Calories serve the sport.

01

Total weekly load

Practices, lifts, games, travel — not one workout.

02

Meal logistics

Travel weeks need packed plans.

03

Strength sessions

Still part of expenditure and adaptation.

04

Sleep like a skill

The cheapest recovery tool.

05

Weight making

Dangerous if improvisational — use experts.

06

Stress load

School/work + sport changes NEAT and appetite.

Method

How this calculator gets to your number

Same Mifflin-St Jeor (or Katch-McArdle) engine as the homepage — with one extra step for this use case.

Run it with my numbers
  1. 1

    Resting burn (BMR)

    Mifflin-St Jeor from age, sex, height and weight. Enter body fat and we switch to Katch-McArdle for leaner or muscular bodies.

  2. 2

    Activity multiplier

    Match the whole week — not your hardest training day. A one-tier mistake usually adds or subtracts 200–400 kcal.

  3. 3

    Season phase

    A small, transparent adjustment for this page’s audience. We keep factors conservative so you can verify with a two-week weight average.

Pick a direction

Phase-appropriate goals

Do not run a lifestyle cut in championship month.

At/above TDEE

In-season fuel

— —kcal / day

Protect performance and recovery.

Get my number
Near TDEE

Off-season recomp

— —kcal / day

Technique and composition with lower risk.

Get my number
−250 kcal max

Short mini-cut

— —kcal / day

Only in appropriate phases with support.

Get my number

Highest return first

Athlete operating system

Repeatable under fatigue.

  1. #1

    Protein + carbs around sessions

    Timing supports training quality.

  2. #2

    Travel kit

    Shelf-stable options beat vending machines.

  3. #3

    Weekly check-ins

    Energy, mood, performance — not only weight.

  4. #4

    Recalculate each phase

    Off-season and in-season are different lives.

FAQ

Questions about TDEE athletes

Short, direct answers. If yours is missing, ask and we will add it.

Ask a question

Often very active or extra active if training volume is high and the rest of the day is not fully sedentary. Still be honest about off days.

Keep going

Related calculators & guides

Back to the main TDEE calculator

Main TDEE calculator

Homepage tool — Mifflin-St Jeor with optional body fat.

TDEE for runners

Endurance running.

TDEE for lifters

Strength focus.

Main TDEE calculator

Homepage calculator.

Two minutes

Get your age-adjusted number now.

Calculate adjusted TDEE