Weight Loss Time Calculator
Estimate how many days and weeks a weight loss goal takes at a steady daily calorie deficit, using 7,700 kcal per kilogram. Enter weight to lose and…
8 of 8 free uses remaining today
Estimate how many days and weeks a weight loss goal takes at a steady daily calorie deficit, using 7,700 kcal per kilogram. Enter weight to lose and daily calorie deficit to see days to goal and weeks to goal when you calculate.
For general information only, not medical advice. Consult a qualified health professional before making health decisions.
Worked example
Example calculated from the starting values. Enter your own values and press Calculate to get your result.
With the default inputs (weight to lose = 8 kg, daily calorie deficit = 500 kcal), the results are: days to goal 123; weeks to goal 17.6.
Quick reference: weight to lose vs result
Reference table based on the example values; it is not your calculation result.
| Weight to lose (kg) | Days to goal | Weeks to goal |
|---|---|---|
| 4 | 62 | 8.8 |
| 8 | 123 | 17.6 |
| 16 | 246 | 35.2 |
| 40 | 616 | 88.0 |
| 80 | 1,232 | 176.0 |
| 160 | 2,464 | 352.0 |
Frequently asked questions
What formula does this calculator use?
Days to goal = lose × 7700 ÷ def; Weeks to goal = lose × 7700 ÷ def ÷ 7. Variables: lose = weight to lose in kg, def = daily calorie deficit in kcal.
What do I need to enter?
You need weight to lose (kg), daily calorie deficit (kcal). Results update as you type.
What is an example result?
With the default inputs (weight to lose = 8 kg, daily calorie deficit = 500 kcal), the results are: days to goal 123; weeks to goal 17.6.
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