Weight Loss Percentage Calculator
Health & fitnessFreeNo sign-up
Weight loss % = (starting weight − current weight) ÷ starting weight × 100. Going from 200 lb to 185 lb is a loss of 15 lb, or 7.5% of your starting weight.
| Progress | |
| Change | lost 15 lb |
| Percent of starting weight | 7.5% lost |
| Current as % of start | 92.5% |
| Rate | |
| Per week | 1.5 lb (0.75% of start) |
| Goal | |
| Goal weight | 180 lb (10% loss) |
| Progress to goal | 75% |
| Still to go | 5 lb |
| Weeks to goal at this rate | 3.3 |
Show steps
- Change = 200 − 185 = 15 lb.
- Percent = 15 ÷ 200 × 100 = 7.5%.
- Weekly rate = 15 ÷ 10 = 1.5 lb per week.
How to use the calculator
- Choose pounds or kilograms.
- Enter your starting and current weight.
- Optional: add a goal weight and the number of weeks since you started to see your weekly rate and progress.
- Press Calculate.
Weight loss percentage formula
Percent lost = (start − current) ÷ start × 100
| Start | Current | Lost | Percent |
|---|---|---|---|
| 200 lb | 185 lb | 15 lb | 7.5% |
| 160 lb | 152 lb | 8 lb | 5% |
| 90 kg | 81 kg | 9 kg | 10% |
| 250 lb | 225 lb | 25 lb | 10% |
Percent is fairer than pounds when comparing people of different sizes: 10 lb is 5% of 200 lb but 8% of 125 lb.
Why 5% to 10% matters
The CDC notes that losing 5% to 10% of body weight can bring health benefits such as better blood pressure, cholesterol and blood sugar for people with overweight or obesity. For someone who weighs 200 lb, that is 10 to 20 lb. People who lose weight gradually, about 1 to 2 lb a week, are more likely to keep it off.
Weight loss percentage practice questions
Test yourself with 6 multiple-choice questions. Choose an answer and press Submit to see if you are right and why. Your score appears at the end.
Quiz complete
Frequently asked questions
How do I calculate my weight loss percentage?
Subtract your current weight from your starting weight, divide by your starting weight, and multiply by 100. (200 − 190) ÷ 200 × 100 = 5%.
Is percent or pounds better for tracking?
Percent lets you compare progress fairly with other people or other times, because it adjusts for starting size. Pounds are easier to picture day to day; both are useful.
What is a healthy rate of weight loss?
Health agencies such as the CDC suggest about 1 to 2 pounds (0.5 to 0.9 kg) a week. Faster loss is harder to keep up and should be supervised by a doctor.
Why does my weight change from day to day?
Water, salt, food in the gut and hormones can move weight by a few pounds daily. Weigh at the same time each day and look at the trend over weeks.
Sources
Related calculators
More health & fitness calculators
Related to This Article
More math articles
- The Best Pre-Algebra Book to Build a Rock-Solid Foundation
- Work, Energy, and Power
- Top 10 Tips to Create a CLEP College Mathematics Study Plan
- PERT Math Flashcards (Free Online: Formulas, Terms & Concepts)
- The Best Grade 8 Math Book for Connecticut Students
- Alaska AK STAR Grade 7 Math Worksheets: 95 Printable PDFs with Worked Examples & Answer Keys
- Top 10 7th Grade ACT Aspire Math Practice Questions
- Oklahoma OSTP Grade 4 Math Free Worksheets: 72 Free PDF Worksheets Aligned to OAS Math Standards
- How to Write Linear Functions Word Problems
- The Best Algebra 1 Book for South Carolina Students
What people say about "Weight Loss Percentage Calculator: % of Body Weight Lost"?
No one replied yet.