BMR Calculator for various scenarios

calories.py

# source:
# https://www.bodybuilding.com/content/nutrient-ratios-and-aloric-needs.html
def body_fat_coef(body_fat_percentage):
    if 10 <= body_fat_percentage <= 14:
        return 1.0
    elif 14 <= body_fat_percentage <= 20:
        return 0.95
    elif 20 <= body_fat_percentage <= 28:
        return 0.90
    elif body_fat_percentage >= 28:
        return 0.85


def bmr_per_hr(weight_lbs, body_fat_percentage):
    weight_kg = weight_lbs / 2.2
    return weight_kg * body_fat_coef(body_fat_percentage)


# source: https://www.youtube.com/watch?v=dfxH1a2ZxGE&t=315s
sedentary              = bmr_per_hr(163, 30)
sitting                = 80.4
sitting_and_fidgeting  = 117.6
standing               = 87
standing_motionless    = 87.6
standing_and_fidgeting = 147.6
walking_1mph           = 196.2
walking_2mph           = 235.0
walking_3mph           = 305.0
walking_time           = 32 / 60
stand_time             = 24 - 8


def scenario(
        sit = 0,
        sit_fidget = 0,
        stand = 0,
        stand_fidget = 0,
        walk = 0,
        workout = 0
):
    sedentary_time = 24 - sum([
        sit,
        sit_fidget,
        stand,
        stand_fidget,
        walk,
        workout
    ])

    return sum([
        sedentary_time * sedentary,
        sit            * sitting,
        sit_fidget     * sitting_and_fidgeting,
        stand          * standing,
        stand_fidget   * standing_and_fidgeting,
        walk           * walking_2mph,
        1.80           * sedentary * workout
    ])


# comatose
print("Comatose", scenario())


# A typical workday:
print("Typical Workday", scenario(walk = 32/60))

# A fidgety workday:
print("Standing Workday", scenario(walk = 32/60, sit_fidget = 8))

# A standing workday:
print("Standing Workday", scenario(walk = 32/60, stand = 8))


# A workout + work day
print("Workout + Workday", scenario(walk = 32/60, workout = 1))

# A workout + standing work day
print(
    "Workout + Standing Workday",
    scenario(walk = 32/60, workout = 1, stand = 8)
)

# A workout + fidgety standing work day
print(
    "Workout + fidgety Standing Workday",
    scenario(walk = 32/60, workout = 1, stand_fidget = 8)
)

# A day spent frantically running errands
print(
    "Errand Day",
    scenario(walk = 2, stand_fidget = 6)
)

# A day spent frantically running errands after a workout
print(
    "Workout + Errand Day",
    scenario(walk = 2, stand_fidget = 6, workout = 1)
)

# A day spent working in the shop
print(
    "Shop Day",
    scenario(stand_fidget = 8)
)