See how changes in your activity level during quarantine or isolation might affect your weight. Enter your stats and activity shift to estimate the calorie impact โ it's a light-hearted look at a very real situation.
โ Calculation completed! Check your quarantine weight projection below.
โ Please fill in all required fields with valid values.
๐ฅ BMR (Mifflin-St Jeor)
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kcal/day โ basal metabolic rate
๐ Pre-Quarantine TDEE
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kcal/day โ total daily energy expenditure
๐ Quarantine TDEE
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kcal/day โ adjusted for quarantine activity
๐ Daily Calorie Difference
-
kcal/day change during quarantine
โ๏ธ Estimated Weight Change
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over your quarantine period
๐ Weekly Weight Trajectory
Each bar shows your cumulative weight change by the end of that week.
๐ Step-by-Step Calculation
Real-World Quarantine Scenarios
๐งโ๐ป The Work-From-Home Shift
A 30-year-old male, 175 cm, 78 kg. Previously moderately active (commuting, walking the office), now sedentary during a 6-week quarantine.
BMR: 1,697 kcal/day
Pre-Quarantine TDEE: 2,630 kcal/day (moderate)
Quarantine TDEE: 2,036 kcal/day (sedentary)
Daily Difference:-594 kcal/day (eating the same = surplus)
Projected Weight Gain:+2.7 kg over 6 weeks
His body expects to burn 2,630 kcal/day, but quarantine drops that to 2,036. Without adjusting intake, the ~594 daily surplus adds up fast!
๐ The Runner Who Adapted
A 25-year-old female, 165 cm, 60 kg. Previously very active (daily runs and gym), now moderate (home workouts, daily walks) during a 4-week quarantine.
BMR: 1,380 kcal/day
Pre-Quarantine TDEE: 2,622 kcal/day (very active)
Quarantine TDEE: 2,139 kcal/day (moderate)
Daily Difference:-483 kcal/day
Projected Weight Gain:+1.2 kg over 4 weeks
Despite adapting with home workouts, the drop in overall activity still creates a notable calorie surplus โ but much less than if she went fully sedentary.
๐ง The Quarantine Fitness Upgrade
A 35-year-old male, 180 cm, 85 kg. Previously sedentary, now using quarantine to become moderately active (daily yoga, home cardio) during an 8-week period.
BMR: 1,808 kcal/day
Pre-Quarantine TDEE: 2,170 kcal/day (sedentary)
Quarantine TDEE: 2,802 kcal/day (moderate)
Daily Difference:+632 kcal/day (bonus burn!)
Projected Weight Loss:-3.3 kg over 8 weeks
If he maintains the same diet, the increased activity creates a calorie deficit. Quarantine became an unexpected opportunity for positive change!
๐ฉโ๐งโ๐ง The Home-Schooling Parent
A 40-year-old female, 162 cm, 72 kg. Previously light (office work, occasional walks), now light again (running after kids, home cooking) during a 10-week lockdown.
BMR: 1,453 kcal/day
Pre-Quarantine TDEE: 1,998 kcal/day (light)
Quarantine TDEE: 1,998 kcal/day (light)
Daily Difference:~0 kcal/day (minimal change)
Projected Weight Change:~0 kg (weight stable)
Her overall activity level didn't change much โ the home chaos replaced the office routine. This shows that not everyone gains weight in quarantine!
๐ How the Quarantine Weight Calculator Works
This calculator estimates how changes in your physical activity level during quarantine might affect your weight. It uses the Mifflin-St Jeor equation to calculate your Basal Metabolic Rate (BMR), then applies activity multipliers to estimate your Total Daily Energy Expenditure (TDEE) both before and during quarantine.
The Mifflin-St Jeor BMR Formula
Male BMR = 10W + 6.25H โ 5A + 5
W = weight in kg, H = height in cm, A = age in years
Female BMR = 10W + 6.25H โ 5A โ 161
W = weight in kg, H = height in cm, A = age in years
Activity Level Multipliers (TDEE)
Your TDEE is your BMR multiplied by an activity factor that represents your daily energy expenditure beyond resting:
๐ช Sedentary (ร1.2)
Little to no exercise, desk job, mostly sitting. This is the default quarantine state for many.
๐ถ Light (ร1.375)
Light exercise or sports 1-3 days per week. Think short walks or gentle home workouts.
๐๏ธ Moderate (ร1.55)
Moderate exercise 3-5 days/week. Daily home workouts, longer walks, or bodyweight circuits.
๐ Active (ร1.725)
Hard exercise 6-7 days/week. Intense home HIIT, long runs, or frequent movement.
๐ฅ Very Active (ร1.9)
Intense daily exercise or physically demanding routine. Maintaining full regimen indoors.
~7,700 kcal โ 1 kg of body weight. Positive difference = weight gain, negative = weight loss.
The calculator assumes your calorie intake stays the same โ since quarantine weight changes happen when your energy expenditure shifts but your eating habits don't adjust proportionally. In reality, stress eating, boredom snacking, or intentional diet changes can amplify or reverse these projections.
How to Use the Calculator
1
Enter your body stats: Height (cm), current weight (kg), age, and sex. These determine your BMR.
2
Select pre-quarantine activity: What was your typical activity level before isolation or lockdown?
3
Select quarantine activity: How active are you now during quarantine? Be honest โ Netflix marathons count as sedentary!
4
Set the duration: How many weeks has your quarantine lasted (or is expected to last)?
5
Review your results: See your BMR, both TDEEs, the daily calorie difference, projected weight change, and a weekly trajectory chart.
Tips for Staying Balanced During Quarantine
๐ถ Walk When You Can
Even 15-20 minutes of walking around your home or neighborhood (if allowed) can add 100+ calories to your daily burn.
๐ง Try Home Workouts
Bodyweight exercises, yoga, or online fitness classes require no equipment and can raise your activity level from sedentary to light or moderate.
๐ฅ Watch the Snacking
Boredom eating is real! Pre-portion snacks, stay hydrated, and keep a food journal to stay aware of extra quarantine calories.
๐ด Prioritize Sleep
Quarantine can disrupt sleep schedules, which affects hormones that regulate appetite. Aim for 7-9 hours of consistent sleep.
๐ฅ
BMR Calculation
Uses the Mifflin-St Jeor equation to estimate basal metabolic rate based on weight, height, age, and sex.
๐
Before vs During
Compare your pre-quarantine and quarantine TDEE to see how your activity change affects your calorie burn.
๐
Weekly Trajectory
Visual bar chart showing cumulative weight change week by week over your quarantine period.
๐ฏ
Actionable Insight
See the daily calorie surplus or deficit in concrete terms, so you can adjust your habits to maintain your weight.
The Quarantine Weight Maintenance Calculator is a light-hearted, informational tool that estimates how a change in your daily activity level during quarantine, lockdown, or isolation might affect your body weight. It was born from a very real experience that millions of people shared โ suddenly finding themselves with drastically different daily routines, struggling to maintain their pre-quarantine energy balance.
Unlike precise medical or clinical tools, this calculator makes a simplified assumption: that your calorie intake remains roughly the same as before quarantine, while your energy expenditure changes due to reduced (or increased) physical activity. This lets you see the "default" weight trajectory before accounting for changes in eating habits.
Why Quarantine Affects Weight
During quarantine, several factors converge to affect weight:
Reduced NEAT: Non-Exercise Activity Thermogenesis (NEAT) โ the calories burned through everyday movements like walking to the bus, climbing office stairs, or standing at your desk โ can drop by 300-500 kcal/day when stuck at home.
Loss of Structured Exercise: Gyms close, team sports stop, commutes vanish. Even dedicated exercisers often find their workout volume and intensity drop.
Stress & Boredom Eating: Emotional eating, mindless snacking, and increased access to the kitchen can drive intake up significantly.
Disrupted Sleep: Unpredictable schedules can alter circadian rhythms, affecting the hormones (ghrelin and leptin) that regulate hunger and fullness.
This calculator focuses specifically on the activity component โ the change in energy expenditure. If you want to account for dietary changes too, our Calorie Calculator can help you set intake targets.
Understanding Your Results
Here's what each number in your results means and how to interpret it:
๐ฅ BMR (Basal Metabolic Rate)
The calories your body burns at complete rest โ just keeping your heart beating, lungs breathing, and organs functioning. This is the baseline for all energy calculations.
๐ Pre-Quarantine TDEE
Your total daily energy expenditure based on your activity level before quarantine. This is what your body was accustomed to burning each day.
๐ Quarantine TDEE
Your projected daily energy expenditure during quarantine based on your current activity level. The difference between this and your pre-quarantine TDEE drives weight change.
โ๏ธ Weight Change Projection
The estimated total weight change over your quarantine period if your calorie intake stays constant. Based on ~7,700 kcal per kg of body weight.
Interpreting the Weekly Trajectory Chart
The trajectory chart shows bars for each week of your quarantine. Each bar represents your cumulative weight change โ how much weight you'd have gained or lost by the end of that week. Green bars indicate weight loss (you're burning more than you're eating), red bars indicate weight gain (you're eating more than you're burning), and yellow means you're maintaining.
Remember: this is a linear projection based on your initial calorie difference. In reality, as your weight changes, your BMR also shifts slightly, creating a feedback loop. The projection is most accurate for shorter durations (2-8 weeks) and smaller weight changes.
Frequently Asked Questions
Is this calculator medically accurate?
No, this is a novelty/light-hearted calculator, not a precise medical tool. It makes several simplifying assumptions โ most importantly that your calorie intake stays constant and that weight change follows a linear calorie-to-weight ratio. Real weight changes involve complex interactions between metabolism, hormones, body composition, gut microbiome, and behavior. Use this as a fun, thought-provoking estimate, not a clinical diagnosis.
Why does the calculator assume my diet stays the same?
Many people find that their eating habits change during quarantine โ some eat more out of stress or boredom, others eat less due to routine disruption. We assume intake stays constant to isolate the effect of activity changes alone. This makes the results clearer: you can see "if your diet stays the same, here's what would happen." If you're also eating differently, the actual result will differ.
What is the 7,700 kcal per kg rule?
It's a commonly used rule of thumb that approximately 7,700 kilocalories of surplus or deficit equates to about 1 kilogram of body weight change. This is based on the energy density of adipose tissue (body fat). In reality, the ratio varies by individual due to factors like water retention, muscle mass changes, and metabolic adaptations. The 7,700 kcal figure is a reasonable estimate used in many nutrition and fitness contexts.
What if my quarantine activity is higher than before?
Great observation! Some people actually become more active during quarantine โ they finally have time for home workouts, daily walks, or active hobbies. In that case, your quarantine TDEE will be higher than your pre-quarantine TDEE, and the calculator will show a negative daily calorie difference, meaning you're creating a deficit. This could lead to weight loss if you maintain the same diet. The trajectory chart will show green bars for this scenario.
Does this work for partial lockdowns or work-from-home too?
Absolutely! While we call it "quarantine," this calculator works for any situation where your activity level changes โ working from home, recovering from an injury, changing jobs, or even seasonal activity shifts. Just select your "before" and "during" activity levels honestly, and you'll get a meaningful estimate.
How can I prevent quarantine weight gain?
If your quarantine TDEE is lower than before, you have two options: (1) Increase your activity โ schedule daily walks, try home workout videos, use stairs instead of elevators, pace during phone calls. (2) Adjust your intake โ be mindful of stress snacking, pre-portion meals, and substitute high-calorie snacks with fruits and vegetables. A combination of both is most effective. Small changes of 100-200 kcal/day can make a big difference over several weeks.
โ ๏ธ Important Disclaimer: This Quarantine Weight Maintenance Calculator is for informational and novelty/light-hearted purposes only. It is not a precise medical tool and should not replace professional medical advice, diagnosis, or treatment. Weight changes are influenced by numerous factors including genetics, hormones, medical conditions, medications, stress, sleep quality, and dietary composition โ none of which this calculator accounts for. If you have concerns about your weight, activity levels, or overall health, please consult a qualified healthcare provider or registered dietitian. Do not make significant dietary or lifestyle changes based solely on the results from this calculator.