Challenge Your Core

Challenge Your Core

Body Fat Calculator

Find out whether your body fat is on target.

Top Features
bear belly
Shed the Bear Belly

Ditch your excess insulation and spring into the new season with these gut-blasting tips

Free Guide: Running for Weight Loss

Try this breakthrough plan to lose weight and start running—no experience necessary. Get the free guide and 12-week training log here

Tray of fruits and vegetables
Lose the Last 10 Pounds

Blast that last bit of fat with this meal-by-meal plan

buff man doing situps outside
How to Pack on 15 Pounds of Muscle

Use this workout plan to bulk up all over

Man holding weight plate
Win the War on Fat

This total-body workout will leave you leaner than ever

happy bride and groom
Your Wedding Dress Workout Plan

Look the best in your dress! These spot-toning workouts will sculpt your trouble zones and enhance your best assets

woman at the gym
Crush More Calories

This high-intensity workout is a superfast body sculptor

man at rowing machine
Row and Grow

Blast fat and build muscle with this all-in-one workout

man sprinting on the beach
High-Speed Fat Loss

Harness the power of intervals and lose your love handles in record time

Man running beside a lake with a city in the background
Lunch-Break Bootcamp

It only takes 20 minutes of your lunch break to torch calories and power through the rest of your day

Man holding weight plate
Win the War on Fat

This total-body workout will leave you leaner than ever

woman at the gym
Crush More Calories

This high-intensity workout is a superfast body sculptor

man performing chinup
The No-Gym, No Excuses Workout

Incinerate fat and pack on muscle without lifting a weight

Man in a blue sweater about to take a bite of dessert
Fend Off Holiday Weight Gain

Rev your metabolism for a lean winter with this intense four-part workout

Man running through a field in a tank top
Elevate Your Baseline

Six ball-field drills for shedding fat fast

Man in the pushup position with his arms extended
Melt Away Calories in Half the Time

Superset your gains with this full-body routine

Close up of a man's abs, man holding towel around his neck
Burn Off Your Belly!

Get the six-pack you always wanted with these fat-burning exercises

man diving in beach volleyball
Your Instant Beach Body

Blast fat, build muscle, and sculpt your entire body with this fast, no-rest regimen

man running up arena steps
3 Moves to Rev Your Metabolism

Burn fat with this multi-muscle challenge. This calorie-torching workout will kickstart your metabolism for high-speed fat-loss

Woman seated on a bench doing a lat pulldown
Small Changes, Big Results

Freshen up your workout and tone up fast

Now I Can Bare My Legs at the Beach

Mandy Lopez used to swelter in jeans all summer long. Now that she's dropped 100-plus pounds, she says, "Bring on the shorts and bathing suits!"

Karenga Ross and Lenora Bryant
This Mother-Daughter Pair Got in Shape Together

With Weight Watchers and the support of each other, Lenora Bryant and her daughter, Karenga Ross, dropped more than 100 pounds total

They Lost 321 Pounds Together!

Mother-daughter duo Caryn and Michele Habermann motivated each other to get in shape

Alicia and Shirley Myers
We Inspired Each Other to Drop 134 Pounds

This mother-daughter pair call each other weekly to stick to their diets

Donia Ontiveros
She Lost 35 Pounds by Biking

This busy mother of four cycled her way slim with her kids

Fran Jacquez
She’s Half Her Former Size

Fran Jacquez exceeded her weight loss goal and inspired her mom to drop 25 pounds, too

Krystal Sanders after weight loss
"I Never Thought I Would be 120 Pounds—Ever!"

Krystal Sanders’ wedding pictures prompted the 27-year-old to adopt smaller portion sizes, start exercising, and ultimately shed 65 pounds

Krista Johnson
She Lost 92 Pounds and Opened a Gym

Mom Krista Johnson clobbered nearly 100 pounds with Tae Bo and now inspires others at her own fitness studio

Steven Robalino
He Lost 75 Pounds and Went Raw Vegan

Steven Robalino fought the pounds he packed on after his mother’s death by eliminating processed foods from his diet and beginning to exercise

Bill Garner
“Health and Fitness are Now My Life”

Bill Garner, 45, dropped more than 100 pounds and discovered a passion for cycling in the process

Daily Calorie Calculator
Daily Calorie Calculator
Are you eating too much, too little, or just enough? Find out exactly how many calories you should be consuming for weight loss
Pace Calculator
Pace Calculator
Whether you're wondering how quickly you'll finish your next race or exactly how fast you need to run to beat your PR, this tool has the answers
Walking Calculator
Walking Calculator
Find out how many calories you burned while walking with this easy-to-use calculator. Enter your stats to get started!
BMI Calculator
BMI Calculator
Do you need to lose a few pounds? Find out by calculating your body mass index, a basic indicator of healthy weight
Body Fat Calculator
Body Fat Calculator
Get a gauge of your body's percentage of fat with this simple tool. Just enter your weight and a few measurements to get started
Woman walking in the park
Walk Off Weight

You can lose weight just by walking! The secret is a mix of steady-paced walks, fat-blasting intervals, and strength training that will melt away fat and send your metabolism soaring.

Slim man walking in the park
Belly Off!

The Belly Off! 2-Week Challenge attacks the fat that matters most—belly fat—using the same simple strategies that have helped hundreds of thousands of men like you turn their lives around.