A steadier way to lose weight

Calorie Deficit Calculator: Compare 15%, 20% & 25%

Compare calorie deficits. Choose a pace you can live with, and track the trend.

No account needed. Free tracking, from the first entry.

A little about you

Choose activity across your usual whole week, including work, walking and training, not your hardest workout.

Your direction
Formula & body composition

These equations estimate population averages. Katch-McArdle needs a reliable body-fat estimate; measurement error affects the result.

Estimate from measurements

Navy circumference estimate; a tape measure cannot measure body fat precisely.

Your daily target
1,609
kcal / day
Estimated maintenance1,884 kcal
BMR at rest1,370 kcal
BMI23.9
deficit−275 kcal

Your daily macros

121gProtein30%
161gCarbs40%
54gFat30%

These grams come from percentages of your calorie target, not a protein prescription based on body weight.

Fine-tune your percentages
Estimated goal dateChoose a goal weight in the direction of your target to estimate a date.

No account needed. Free tracking, from the first entry.

Compare calorie deficits

Compare lean-bulk surpluses

For adults. Estimates are not medical advice. Pregnancy, breastfeeding, eating disorders and medical conditions need individualized guidance.

Make today your first day.

Add a meal or a weigh-in. Your records stay on this device until you choose to sync.

First meal

Quick calorie log. Macros and portions are not included in this entry.

Today’s weight

A calculator is only the beginning.

1

Find your starting point

Compare formulas, set a pace and turn energy needs into a practical macro target.

2

See your everyday patterns

Log meals and weigh-ins. Follow a smoother trend, with no pressure to make every day perfect.

3

Let your plan learn

Pro uses complete intake records and trend weight to make measured weekly adjustments.

The method, in plain language.

A smaller deficit can be a better starting point.

A calorie deficit means eating less energy than you expend. A 15% reduction usually leaves more room for meals and recovery than a 25% reduction. The comparisons below use your estimated TDEE; a larger percentage is not automatically better. The calculator flags targets below your estimated BMR so you can reconsider the pace.

Treat the goal date as a range, not a deadline.

The date assumes your selected weekly rate continues. Real progress varies with water retention, appetite, activity and changing body weight. The 7,700 kcal per kg approximation is useful for planning, but it does not predict a fixed biological response. Update the plan using consistent records rather than compensating for a single high weigh-in.

Find the right starting point.

One shared calculation engine, with a focus that fits your goal.

A few useful answers

Should I choose a 15%, 20% or 25% deficit?

Start with a moderate target that supports adequate nutrition and training. Larger deficits can be harder to sustain. If a target is below BMR or causes persistent fatigue, review it with a qualified professional.

Why does my predicted goal date change?

The calculator uses your selected pace. The tracking workspace instead uses the observed trend slope. A flat or contrary trend cannot support a meaningful arrival date.