Health Calculators

RMR - Resting Metabolic Rate Calculator

This online tool will calculate how many calories you burn when you are resting.

RMR Calculator - Resting Metabolic Rate

Select your gender
yrs
cm
kg
kcal/day
made with ❤️ by

Table of contents

RMR calculator
What is RMR?
What are the possible effects on your resting metabolic rates?
BMR vs RMR
How can RMR be used to lose weight?
Is RMR testing accurate?
Is it possible to slow down your RMR by fasting?
How does a ketogenic diet impact your RMR?

RMR calculator

The resting metabolic rate calculator calculates the calories your organism needs to remain alive (in idle time). Calculations are made using the Harris-Benedict formula. This modification allows for the calculation of calories burned during food digest. Digestive activity can increase your basal metabolic rate by 5--10%. If you eat around 1800 calories per day, approximately 90-180 calories are used to digest, absorb and store the meal nutrients.

What is RMR?

stands for Resting Metabolic Rate. This parameter tells how many calories are needed by your body for the most basic functions (to keep it alive) while you rest. These functions are e.g. :
  • Breathing
  • It's a beating heart
  • Circulating blood
  • Basic brain functions
  • food digestion
  • Maintaining vital organ function
  • RMR does NOT account for calories used to support physical activity. Every activity we engage in during a given day requires energy (calories).

    What are the possible effects on your resting metabolic rates?

    The following factors could have an impact on your RMR:
  • Muscle – More muscle can increase RMR
  • Age - RMR falls with age
  • Genetics can affect your natural RMR levels
  • Climate - Being in a cold climate can increase your RMR
  • Eating small meals regularly will increase your RMR
  • Also, pregnancy can lead to an increase in RMR
  • Crash-dieting is a way to lower the RMR
  • BMR vs RMR

    Basal metabolic rate (BMR), is another term. This is different from resting metabolic rates. BMR measurements require a longer rest period and an overnight fast to be accurate. RMR requires only a 15 minute relaxation. BMR doesn't account for e.g. calories utilized for food digestion. RMR is, therefore, more reliable in estimating resting calories. Your body will usually absorb some food at each moment.

    How can RMR be used to lose weight?

    Eat slightly less than your RMR in order to lose weight. This is how many calories your body requires to live each day. fat. Please check with your doctor before starting any serious diet. If you feel any pain, stop.

    Is RMR testing accurate?

    Visit a licensed facility to get the best method to determine your RMR. This test requires you to breathe into a small device and stay there for about 10 minutes. The majority of CO2 that is produced during respiration leaves your body through the mouth. This test is costly, so you can also use an online calculation to find out how much. The calculator has an accuracy of +/– 300 calories.

    Is it possible to slow down your RMR by fasting?

    Research suggests that fasting has no significant effect on RMR. The research in this area is still new and limited. It is possible that RMR is not affected in any significant way. You should consult your doctor before taking any serious fasts. Stopping if you feel unwell is a good idea.

    How does a ketogenic diet impact your RMR?

    A recent study showed that there was not a significant statistical difference in RMR for obese patients following a ketogenic diet. This diet is low in calories and can help them lose large amounts of weight (20kg). The most current studies on ketogenic diets may not be accurate as they are a relatively new trend.
    Parmis Kazemi
    Article author
    Parmis Kazemi
    Parmis is a content creator who has a passion for writing and creating new things. She is also highly interested in tech and enjoys learning new things.
    RMR - Resting Metabolic Rate Calculator English
    Published: Tue Jun 14 2022
    In category Health calculators
    Add RMR - Resting Metabolic Rate Calculator to your own website

    Other health and welfare calculators

    BMI Calculator - Calculate Your Body Mass Index Accurately

    This calculator provides accurate Body Mass Index (BMI) for women and men. Determine is your body considered healthy.

    TDEE Calculator

    Calculate your total daily energy expenditure (TDEE) easily with this free online calculator.

    Harris-Benedict (BMR) Calculator

    Calculate your basal metabolic rate based on well-known formulas with this online calculator.

    Normal Blood Pressure Calculator

    Blood pressure is a vital sign of human body. Calculate normal blood pressures for your age with this calculator!

    Age Calculator

    Get your age in years and days today with our free age calculator.

    Korean Age Calculator

    Find out your Korean age easily with our online calculator!

    Body Shape Calculator

    This is an online tool that will tell you your body shape depending on your measurements.

    Blood Type Calculator

    This tool will calculate the possible blood type for a child.

    Pregnancy Fertilization Calculator

    This tool will calculate an estimate of the fertilization date based on the due date.

    Water Calculator

    This water calculator allows you to calculate how much water is required each day so that you don't have to worry about the amount of water you still need to drink.

    Sauna (steam Room) Calories Burned Calculator

    This online tool will help you calculate the calories you burn within a certain timeframe.

    Body Fat Calculator

    This body fat calculator can help you calculate how much body fat is in your total body weight.

    Navy Body Fat Calculator

    This parameter applies to all US Navy service members. They are required by military service to maintain a certain percentage of body fat (%BF).

    Progesterone To Estrogen Ratio Calculator

    The calculation of the progesterone/estrogen ratio, also known as Pg/E2 or simply P/E2, is an integral part of female hormone imbalance assessment and success prediction in vitro fertilization (IVF).

    Body Surface Area (bsa) Calculator

    The BSA calculator makes it easy to calculate your body area (BSA), which refers to the external surface area of the human physique in square meters.

    Mean Arterial Pressure Calculator

    This MAP calculator (Mean Arterial Pressure calculator) determines the average arterial pressure in a single cardiac rhythm.

    Duke Treadmill Score Calculator

    This tool can be used to determine the prognosis, and to plan for future treatment for patients with suspected heart disease.

    Fat Burning Zone Calculator

    Find out the optimal fat burning zone with this easy-to-use fat burning calculator.

    Waist-hip Ratio Calculator

    Waist to Hip Ratio Calculator calculates the dimensionless ratio between the circumference of your waist and that of your hips.

    Ideal Weight Calculator

    Find your ideal body weight with this simple weight calculator. Fast and easy to use! Works in kg and lbs!

    Calorie Calculator

    You can use the calorie calculator to calculate how many calories you need each day.

    Face Shape Calculator

    This online tool will help you find your face shape based on measurements.

    Child Weight Percentile Calculator

    This is a tool that helps measure how a baby’s weight compares to other babies.

    VO2 Max Calculator

    The max calculator was created for any sportsman who wants to calculate their maximal aerobic potential.

    Blood Sugar Converter

    Get accurate and reliable results with this blood sugar converter/calculator. We use the universally recognized standard of measuring glucose levels in mmol/L. If you're more comfortable with the commonly used mg/dL unit, you can easily switch to that choice.

    Baby Formula Calculator

    Learn more about baby formula and calculate how much formula your baby needs