Weight loss percentage calculator
Enter your starting and current weight to see the change as a percentage of where you began, with your weights at 5% and 10% down.
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Your 5%, 10% and 15% marks
Each mark is a share of your own starting weight, so it moves with where you began. The calculator above shows your 5% and 10% marks. For a quick look, find the row nearest your starting weight.
| Starting weight | 5% down | 10% down | 15% down |
|---|---|---|---|
| 60 kg | 57.0 kg | 54.0 kg | 51.0 kg |
| 70 kg | 66.5 kg | 63.0 kg | 59.5 kg |
| 80 kg | 76.0 kg | 72.0 kg | 68.0 kg |
| 90 kg | 85.5 kg | 81.0 kg | 76.5 kg |
| 100 kg | 95.0 kg | 90.0 kg | 85.0 kg |
| 110 kg | 104.5 kg | 99.0 kg | 93.5 kg |
| 120 kg | 114.0 kg | 108.0 kg | 102.0 kg |
| Starting weight | 5% down | 10% down | 15% down |
|---|---|---|---|
| 150 lb | 142.5 lb | 135.0 lb | 127.5 lb |
| 175 lb | 166.3 lb | 157.5 lb | 148.8 lb |
| 200 lb | 190.0 lb | 180.0 lb | 170.0 lb |
| 225 lb | 213.8 lb | 202.5 lb | 191.3 lb |
| 250 lb | 237.5 lb | 225.0 lb | 212.5 lb |
| 275 lb | 261.3 lb | 247.5 lb | 233.8 lb |
| 300 lb | 285.0 lb | 270.0 lb | 255.0 lb |
In stones and pounds
Choose st and lb to type weights the way many UK scales show them. One stone is 14 pounds, so 15 st 10 lb is 220 lb. The percentage comes out the same in any unit.
How the calculator works
Percentage lost = (starting weight minus current weight) ÷ starting weight × 100
It compares two scale readings and nothing else. It cannot tell you how fast the weight came off, what caused it or how much of it was fat. Compare readings taken the same way, such as first thing in the morning, because one reading can be a kilo off your usual weight for reasons explained in why your weight changes every day.
To work it out by hand, with more examples and how to keep your starting point steady, see how to calculate your weight loss percentage.
These calculators give estimates for adults, not a diagnosis. Nothing you type leaves this page.