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FatCalc
fatcalc.com › bwp
Calorie Calculator for Weight Management
October 26, 2025 - Enter a time frame for your goal weight (start date and target date). Note that this tool is intended for individuals who are 18 years or older and are not pregnant or breastfeeding. This weight loss calculator provides results only if it determines that your daily energy intake must exceed 1,000 calories to reach your goal weight by your target date.
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Everyday Health
everydayhealth.com › product reviews › diet & nutrition products › weight management products
Weight Loss Calculator by Everyday Health
February 27, 2024 - Everyday Health’s weight loss calculator can help you estimate your calorie needs for weight loss. Learn more about how many calories you need and how they are estimated.
Discussions

Weight loss timescale calculator (that was extremely accurate for me)
By 2022 I can be down to just 14 lbs! More on reddit.com
🌐 r/loseit
35
219
August 16, 2020
The ultimate weight loss calculator!
 Your Results!

BMI Information
The ideal weight for your height is:  Data
Your Current BMI (Body Mass Index) is Data
To achieve your goal BMI of : Not set above
you would need to weigh: 0 

Zero, huh?

I think you might consider testing data values BEFORE recalculating, to avoid people getting freaked out by illogical, or inconsistent presentation. It auto calcs, too, huh? Then you really do want to check every value before doing any math. It'll avoid those #div0 and #NaN issues, too.

See also: This wp plugin demo for a Body Recomposition Calculator

More on reddit.com
🌐 r/loseit
65
79
September 17, 2013
Wolfram Alpha weight loss calculator.

I'm not sure I believe it... It claims I (a 5 2" female, around 170lbs currently) can lose 40 lbs in 2 months. That's very, very optimistic lol

More on reddit.com
🌐 r/loseit
38
65
September 2, 2011
Weight loss calculator
Is this it? http://www.losertown.org/eats/cal.php More on reddit.com
🌐 r/loseit
25
68
October 3, 2014
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NIDDK
niddk.nih.gov › home › health information › weight management › body weight planner
About the Body Weight Planner - NIDDK
August 12, 2025 - The Body Weight Planner allows users to make personalized calorie and physical activity plans to reach a goal weight within a specific time period and to maintain it afterwards.
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iCliniq
icliniq.com › home › health tools › weight loss by target date calculator
Weight Loss by Target Date Calculator | iCliniq
Our Weight Loss by Target Date Calculator, as the name suggests, plays an imperative role in calculating the number of calories required to sustain the current weight and the number of calories needed to lose or gain weight within a stipulated period of time.
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Calculator.net
calculator.net › home › fitness & health › calorie calculator
Calorie Calculator
This calorie calculator estimates the number of calories needed each day to maintain, lose, or gain weight. Learn the kinds of calories and their effects.
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MealPro
mealpro.net › blog › weight-loss-tracker
Weight Loss Calculator - Find Out How Much Time it Will Take for You To Lose Weight
July 19, 2024 - Enter your stats and find out how much time it will take for you to lose weight. Access the free weight loss calculator now
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Reddit
reddit.com › r/loseit › weight loss timescale calculator (that was extremely accurate for me)
r/loseit on Reddit: Weight loss timescale calculator (that was extremely accurate for me)
August 16, 2020 -

I was browsing Reddit when I came across an old post with a link to a calculator - you input your details and the number of calories you're planning to eat daily and it comes up with a timeline for when you should hit certain weights.

https://www.losertown.org/eats/cal.php

I thought I'd share as I found it super accurate. I put in my starting weight and it calculated it would take me 12 weeks to get to the weight I am now (give or take 1lb) and I did indeed begin calorie restriction 12 weeks ago so it's worth a try if you're wondering how long your weight loss journey is likely to take! It also shows how your calorie deficit reduces as you lose weight which I also found really useful.

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Calculator.net
calculator.net › home › fitness & health › macro calculator
Macro Calculator
The number of calories a person needs to consume on a daily basis is mainly based on a number of factors including height, weight, age, and activity level, along with whether the person wants to maintain, lose, or gain weight. The values returned by the calculator are based on two equations for estimating the basal metabolic rate (BMR) or resting daily energy expenditure (RDEE) of a person.
Find elsewhere
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Calculator Online
calculator-online.net › weightloss-calculator
Weight Loss Calculator - Plan Your Calories to Lose Weight
The individual needs may differ based on age, gender, height, weight, and activity level. If you are unsure about how long it will take to lose weight, use our free weight loss calculator that takes the target date and tells you about calories you need to eat within a specific time to lose weight.
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American Cancer Society
cancer.org › home › all about cancer › cancer risk and prevention › diet, physical activity, and healthy living › eat healthy › calorie counter
Calorie Counter | American Cancer Society
October 22, 2025 - If you want to lose weight, use this calculator to help give you an idea of your daily maintenance calories and try to take in less calories than you use through exercise and your everyday activities.
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Calculator.net
calculator.net › home › fitness & health › tdee calculator
TDEE Calculator
TDEE is calculated based on the factors described above. The calculation usually begins with an estimation of basal metabolic rate (BMR), which is based on the use of equations that have been developed for this specific purpose. This includes physical characteristics such as age, gender, height, and weight.
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MyPlate
myplate.gov › myplate-plan
MyPlate.gov | MyPlate Plan Calculator
Calculations for women who are pregnant or lactating vary based on age and other factors. ... Use the Plan that is right for you! ... You can easily add the MyPlate Plan to your website or blog exactly as it appears on MyPlate.gov. ... Find savings in your area and discover new ways to prepare budget-friendly foods. ... Get MyPlate nutrition tips on Amazon Alexa devices or the free Alexa app. ... Build healthy eating habits one goal at a time...
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ATHLEAN-X
learn.athleanx.com › home › calculators › calorie counter and weight loss calculator
Calorie Counter and Weight Loss Calculator
May 22, 2025 - Use this calorie and weight loss calculator to see how many calories you’re currently burning per day to support your weight loss or gain goals.
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Good Neighbor Pharmacy
mygnp.com › home › calculators › weight loss calculator
Weight Loss Calculator - Good Neighbor Pharmacy
November 1, 2025 - How much weight can you lose? Discover personalized results with the weight loss calculator based on your height, weight, age, gender, and activity level.
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Runbundle
runbundle.com › tools › weight-vs-pace-calculator
Weight vs Pace Calculator | runbundle
July 1, 2025 - To use the calculator simply enter your weight, choose or enter a race distance, pick a time or pace and hit "Calculate". The results table shows the predicted effects of weight loss/gain on times for your chosen distance.
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Levity
joinlevity.com › weight-loss-calculator
Weight Loss Calculator from Levity
Use our free weight loss predictor calculator to estimate progress and explore expert tips for achieving sustainable, long-term weight loss success.
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NASM
nasm.org › resources › calorie-calculator
Calorie Calculator | NASM
Calculate calories, RMR, TDEE, and macronutrients to achieve your weight loss goals and help determine body fat percentage with this free NASM weight loss tool.
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LifeSpanFitness
lifespanfitness.com › pages › weight-loss-calculator
Weight Loss Calculator – LifeSpanFitness
With Lifespan’s weight loss calculator, you can accurately determine the optimal calories you need to intake daily to reach your target weight. Not only can this calculator guide you to your target weight, it can lead you towards reaching your optimal body composition over time.
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BodySpec
bodyspec.com › blog › post › weight_loss_calculator_by_date_set_a_date_get_your_plan
Weight Loss Calculator by Date: Set a Date, Get Your Plan | BodySpec
DEXA Scan
Dual-energy X-ray absorptiometry for precise body composition analysis including muscle mass, body fat percentage, and bone density for wellness and fitness tracking
(4.9)
Price   $59.95