TDEE Calculator

TDEE calculators provide rough estimates rather than exact measurements. This tool calculates your energy expenditure based on the Mifflin-St Jeor equation which is widely considered the most accurate equation for calculating BMR and TDEE. 

However, actual calorie needs are highly individual and complex. Factors such as genetics, hormones, sleep, stress, and body composition all play a significant role in how your body manages energy. It is best to use this number as a general starting point and adjust your intake based on how your body responds and how you feel over time keeping in mind your overall health and medical conditions.

Yes, this calculator can be used as a starting point to lose weight. By estimating your maintenance calories (TDEE), you can get a general sense of how much energy your body uses each day. Weight loss typically involves consuming fewer calories than you burn, but the right approach and amount varies from person to person.

Rather than focusing strictly on a number on the scale, Felix encourages working toward your “best weight”, which is the weight you can comfortably maintain while living your healthiest and most enjoyable life. This may look different from what you expect, and that’s okay.

Before making significant changes to your nutrition or activity, it is always a good idea to speak with a healthcare professional who can help you set safe, realistic, and personalized goals.

The calculator uses standardized biological equations to first estimate your Basal Metabolic Rate (BMR), which is the energy your body requires to function at rest. It then applies an “activity multiplier” based on how much you move throughout the day. This combination helps estimate the total energy required to fuel both your basic physiological functions and your physical activity.

Keep in mind that these are estimates, not exact numbers. Your body constantly adapts to changes in diet and activity, so a calculator cannot perfectly predict your energy needs. These tools can be a helpful starting point, but they should not be the sole guide for long-term dietary or health decisions. Working with a healthcare provider or registered dietitian can help you interpret these numbers in the context of your individual health.

A TDEE calculator provides an estimate of your Total Daily Energy Expenditure, the total number of calories your body burns in a 24-hour period. This can help you get a general sense of how many calories you need each day to maintain your current body.

While this can be a helpful starting point for nutrition planning, it is important to understand that the result is an approximation, not a precise measurement. Factors like metabolism, stress, sleep, medications, and body composition can all influence your actual energy needs in ways a calculator cannot capture. For this reason, it is best to use these numbers as a general guide and discuss your health goals and dietary needs with a healthcare professional or registered dietitian.

In addition to estimating the total number of calories your body burns per day, the calculator provides estimated calorie targets based on three common goals:

• Weight loss
• Weight maintenance
• Muscle building
  

It also provides a suggested macronutrient breakdown — an estimate of how much protein, carbohydrates, and fat you might aim for each day based on your selected goal.

As with all calculator outputs, these are general estimates and may not reflect your individual needs.

Yes, you can influence your TDEE through physical activity. Increasing your everyday movement and intentional exercise may contribute to increasing your daily burn. Additionally, building lean muscle mass can slightly increase your Basal Metabolic Rate (BMR), as muscle is more metabolically active than fat.

TDEE is generally broken down into four distinct components of energy expenditure:

• Basal Metabolic Rate (BMR): The energy used for basic life-sustaining functions. This typically accounts for the largest portion of your TDEE.
• Thermic Effect of Food (TEF): The energy used to digest and process the food you eat.
• Non-Exercise Activity Thermogenesis (NEAT): The energy used for everyday movement that isn’t intentional exercise while being awake. Examples can include things like walking, cleaning, fidgeting, and any other small movements.
• Exercise Activity Thermogenesis (EAT): The energy used during intentional physical workouts.

Most TDEE calculators estimate these components using standardized equations and the activity information you provide, so the results are approximations rather than exact measurements.

Generally, yes. Biological sex can influence TDEE due to differences in average body composition and hormone profiles. For example, individuals with higher muscle mass typically have a higher BMR because muscle tissue requires more energy to maintain than fat tissue. However, these are general trends and individual metabolism varies widely based on factors like age, body size, activity level, and overall health, regardless of sex.

In simple terms, TDEE is the total amount of the energy (calories) your body uses in a day. Think of it as your body’s “fuel requirement.” It includes everything from the energy used to keep your heart beating and your lungs breathing, to the energy used for walking, working, and exercising. 

Since everyone’s body and lifestyle are different, your TDEE is unique to you and can change over time.

TDEE is your estimated maintenance level, which is the total amount of energy your body uses in a day to stay at your current weight. A calorie deficit is a gap created when you consume fewer calories than your TDEE. 

While TDEE represents what your body is currently spending, a calorie deficit is a deliberate reduction designed to encourage your body to draw on stored energy for fuel. It is important to note that a sustainable, moderate deficit is generally recommended over a drastic one in order to support overall long-term health goals.

While eating fewer calories than your TDEE (creating a calorie deficit) often leads to weight loss, the process is rarely a straight line. Your body may react to a deficit by slowing its metabolism or increasing hunger signals to protect its energy stores. Long-term health is better supported by a modest, sustainable deficit rather than drastic restriction, which can lead to muscle loss and nutrient deficiencies. Maintaining adequate protein intake and staying physically active are also vital in helping to preserve muscle during weight loss.

Yes, test your device’s video and audio in a test meeting at zoom.us/test. Please also adjust your device settings to allow pop-ups, ensuring any pop-up blocker features are turned off.

Zoom for Android phone

• Open the Google Play Store on your device.
• Search for Zoom Cloud Meetings.
• Locate and tap the entry by zoom.us.
• Tap Install.
• Read the permissions listing.
• If the permissions listing is acceptable, tap Accept.
• Allow the installation to complete.
  

Zoom for iOS phone/tablet

• Tap the App Store icon on your device.
• Tap Search at the bottom right of your screen.
• Enter Zoom in the search text box.
• Select Zoom Cloud Meetings from the available app choices.
• Tap Get.
• Tap Open.
  

Zoom for Computer (Windows and Mac)

• Open an internet browser. (Use Google Chrome, Safari, Firefox or Edge. Zoom does not work very well in Internet Explorer.)
• Go to zoom.us/download.
• Click Download below Zoom Client for Meetings.
• Click and Open the downloaded file. It is typically saved to your Downloads folder.
• Follow the prompts to install the application on your computer.

You can reschedule your appointment by clicking the “Reschedule” button in the email you were sent. The email is called: “Confirmed: Audio/Video Appointment with [Prescriber Name] on [Appointment Date] and will be from [email protected]. 

We use Zoom for Healthcare to conduct our appointments. Our virtual visits are 100% compliant with federal and provincial health privacy laws, never recorded, and encrypted to protect your privacy.

After receiving the booking link from your healthcare practitioner, you will first need to schedule a time to meet with them. We will then send you an email with your appointment details – including the day, time and Zoom instructions. At the scheduled time, you will need to click the Zoom link (for video calls) or dial the phone number listed in the email (for audio calls). 

Appointments typically include a discussion of your physical and mental health history. Your practitioner will talk with you about your symptoms and the reason for the appointment as part of their process to create the best treatment plan for you. If you have any privacy-related questions or concerns, please refer to our Privacy Policy or contact [email protected]

We are happy to facilitate requests for a release of your medical records with Felix to your primary care provider.

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Your privacy is our top priority. All your data is 256 bit SSL/TLS encrypted, and we take significant steps to keep your data secure. You can read our Privacy Policy for more information. 

Yes, your security is paramount to Felix’s mission. Personal health information provided during your medical assessment is strictly and legally confidential between you and the Felix healthcare practitioner.

Beyond that, all your account information (including the medical assessment, credit card, and shipping information, etc.) is also stored safely and securely. Felix is compliant with all federal and provincial health privacy legislation. It is our duty to protect your data with comprehensive security infrastructure and stringent data policies to ensure it stays private and secure.

Read more on our Privacy Policy.

Yes! In Canada, only a licensed healthcare practitioner can write a prescription, and only a registered pharmacist can fill that prescription. We are supported by leaders in the Canadian pharmacology and specialized medical fields. Felix adheres strictly to all the regulations set forth by all applicable Colleges of Pharmacists and Colleges of Physicians and Surgeons in which we operate.

Absolutely. All prescriptions obtained via Felix are provided by licensed Canadian healthcare practitioners—the same as you would get at a hospital, doctor’s office, or clinic. These practitioners do not provide prescriptions unless they deem it medically safe and appropriate to write them based on your medical profile and assessment answers. Our assessments have been crafted by the practitioners on our medical team. Finally, all Felix Pharmacies are provincially accredited just like any retail pharmacy.

No. A visit with a licensed healthcare practitioner is required for all treatments currently provided through Felix’s service.

No. We use an asynchronous telemedicine model so you can complete your online visit in your own time and we save your progress so you can come back later to finish it.

If you are completing a visit in the mental health or weight loss categories, your healthcare practitioner may require a phone or video call to discuss your medical profile further during the assessment process.

Most assessments do not require a phone or video conversation. Once a prescriber has reviewed the info in your assessment they will respond to you via secure instant messages that you can access within your Felix account.  

If you are completing a visit in the mental health or weight loss categories, your healthcare practitioner may require a phone or video call to discuss your medical profile further during the assessment process.

After creating an account, you will complete a medical assessment for evaluation by one of the Felix healthcare practitioners. 

During your assessment, you will have the opportunity to send your practitioner questions via secure messaging.  

In most cases, practitioners will complete your assessment with secure messaging alone but sometimes they may determine you require an audio or video visit and/or further diagnostic testing to help determine the best treatment plan for you. 

If your practitioner has determined a prescription treatment is appropriate, they will approve your visit and write you a prescription. Our pharmacy will then ship your prescription to your home.

You’ll be able to message your healthcare practitioner if you have questions or want to make changes to your treatment at any time.

You can expect to receive a response from a healthcare practitioner within 48 hours of submission.  Delays may occur at high volume periods or over statutory holidays – we thank you for your patience and look forward to supporting you.

Great, you’ve already taken the first step! Next, a healthcare practitioner will review your assessment and if necessary, will send you a link to book an online audio or video appointment with them. This appointment will help them determine the best treatment plan for you. If your healthcare practitioner thinks you will benefit from an available medication, they will write you a prescription. Our pharmacy can ship your medication to your home if you would like your medication dispensed through the Felix Pharmacy network.

Go to Billing, and you will be able to update the credit card information on file.

The cost of the checkup visit varies by category, but in many cases there is no charge, so long as you complete your checkup visit before your current prescription expires.

Felix charges a fee for the online visit. In most cases the fee is $40 but varies by treatment category. The visit fee includes a prescription valid for up to a year (depending on the condition) and on-going support from the healthcare practitioner or pharmacist.

It depends. Treatment costs vary but will be in line with what you would pay at a pharmacy in person. You will see the estimated cost of your treatment before insurance, during the online visit but will only be billed for medication costs for your prescription once it is approved and sent to our pharmacy. Once approved, your treatment and payment will be processed within one to two days.

Keep in mind that you won’t necessarily need to pay the full price yourself. If you have insurance, Felix’s partner pharmacies will bill your insurer directly. You may also be eligible for financial support in your province.

We accept all major credit cards for any aspect of your treatment not covered by insurance or other financial support

While it is illegal in Canada to display market pricing for prescription medication, you will be able to see the estimated cost of medication during the online visit. The price shown is an estimation and will vary if the healthcare practitioner prescribes you a different medication, or if you have insurance or benefits coverage. All estimated prices shown during the online visit include the pharmacy fill fee based on the refill schedule of your choice.

Yes, the visit fee is charged when you submit your visit and is generally refunded if the visit is denied by your healthcare practitioner.
Exceptions apply: Weight Loss visit fees are refunded only if you are deemed clinically ineligible. Visit fees for Diagnostic categories (Metabolic Health, STIs) and Menopause are non-refundable. For these complex health categories, the visit fee covers the practitioner’s time to review your medical assessment, issuing a lab requisition, reviewing your lab results with you, and making a diagnosis if applicable.

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A signature upon delivery may be required.

Your address can be updated from the Shipping tab of your account. Kindly note that any changes need to be made 48hr ahead of your refill date.

Not long. After completing your assessment, a practitioner will generally respond within 24 hours, and often much sooner.

The pharmacy will process and fill your prescription within 2-3 business days of your prescription approval date if there is nothing blocking them from doing so.

All packages are shipped via Express Post, which usually takes 2-3 business days. You will receive an email with your tracking number once your treatment has been shipped.

You have 14 days from the date your tracking link was sent to notify us of an undelivered or lost package, or damaged medication.

There is currently no cost to have your medication sent to you from our Felix Pharmacy network.

Your tracking number will be activated when the courier picks up your shipment from the pharmacy. Please allow until 6 pm the following business day, and you should then be able to see the status of your package. If the tracking number still isn’t working, please reach out to our Patient Support team through the chat bubble in the bottom right corner of your account.

Absolutely. All Felix shipments arrive in a nondescript blister package so you can have your treatment shipped wherever makes sense for you as long as there is someone there to sign for it.

We’ll contact you via email if your package is returned to us!

For most treatments, your meds will be destroyed 1 month after your fill date should you fail to respond to Felix Customer Support or contact the partner pharmacy. Temperature controlled medications may have a reduced reshipment eligibility window due to their limited shelf life, in accordance with product guidelines. All reshipments are at the discretion of a pharmacist’s professional judgment.

If you require assistance with a returned package, please reach out to our Patient Support team through the chat bubble in the bottom right corner.

Depending on your province of residence and the treatment being dispensed, your Felix packages may require a signature on delivery. If this cannot be collected where necessary, your package will be available at the closest post office for pick up. Usually, packages are available for up to 14 days after the first attempted delivery. If you don’t pick up your package within the allotted time, it will be returned to the sender, which may cause a further delay in your delivery.

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Status updates for your prescription will appear in the Upcoming tab. You’ll be able to see if your prescription is being processed by our pharmacists or if it’s en route for delivery.

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Refill schedule (drug dependent)

• Monthly: refill is processed approx. every 20 to 23 days
• Every 2 months: refill is processed approx. every 50 to 53 days
• Every 3 months: refill is processed approx. every 76 to 84 days

Yes, the pharmacy will process your prescription to account for any expected delays due to the holiday season.

Once you’ve created your Felix account and set up your medical profile, you can complete an online visit to any of the treatment categories you are eligible for using that same account.

Changing treatment plans does legally require a new visit as the healthcare practitioner will need to both cancel the existing treatment plan as well as review a new health assessment of yours.

Go to Treatments, click “View details”, and use the “Change my treatment plan” feature to submit a free follow-up visit and request a treatment change with your healthcare practitioner.

Treatment plans written by Felix healthcare practitioners can last up to 12 months from the date of issue.. However, the details and duration of your treatment plan will ultimately be decided by the practitioner who reviews your online visit.

At this time we are not accepting external patient transfers due to capacity restrictions. We hope to have the capacity to accept your transfer soon. Our healthcare practitioners will take your existing treatments into consideration to provide a Felix Treatment plan.