Health Tools

Calorie Deficit Calculator

Estimate a daily calorie target from maintenance calories and a chosen daily calorie deficit.

Updated April 12, 2026
Free online tool
Planning and research use

Why this page exists

Calorie planning is easier when maintenance calories and a chosen deficit turn into one clear daily target instead of rough guesswork. This calculator helps visitors estimate a daily calorie target, the daily deficit used, and the estimated weekly calorie deficit from a simple planning setup.

Interactive tool

Run the estimate

Enter your numbers and read the result first, then use the sections below to understand what affects the outcome.

Calculator

Calorie deficit calculator

Estimate a daily calorie target from maintenance calories and a chosen daily calorie deficit.

Result

1,900 calories/day

Estimated daily calorie target based on maintenance calories minus the daily calorie deficit entered.

Recommended daily calorie target1,900 calories

Daily deficit used500 calories

Estimated weekly calorie deficit3,500 calories

Approximate weekly pace1.00 lb/week

2,400 maintenance calories minus a 500-calorie daily deficit gives a target near 1,900 calories per day.
That deficit adds up to about 3,500 calories over a week, which is roughly 1.00 lb per week using the common 3,500-calorie rule of thumb.
Use the result as a planning estimate only, because sustainable intake, training demands, and medical considerations can all change what a realistic target should be.

This is a general planning estimate, not medical advice. Individual calorie needs, training demands, health conditions, and sustainable targets can vary widely.

Planning note

Last updated April 12, 2026. Use this tool to compare scenarios and plan ahead, then confirm important details with the lender, employer, insurer, contractor, or other qualified provider involved in the final decision.

How it works

What the calculator is doing

Enter estimated maintenance calories and the desired daily calorie deficit.

The calculator subtracts the deficit from maintenance calories to estimate a daily calorie target.

It also shows the weekly calorie deficit implied by that daily deficit and a rough weekly pace estimate.

Understanding your result

This is a general planning estimate, not medical advice. Sustainable intake, training demands, and health conditions can all change what an appropriate target looks like.

Browse more health tools

Examples

Ways people use this tool

Example scenarios help turn a quick estimate into a more useful comparison or planning step.

Turn maintenance calories into a lower daily target

A simple deficit estimate can make planning easier when maintenance calories are already known.

Compare the effect of different daily deficits

Changing the daily deficit can show how quickly weekly calorie totals and the rough weekly pace move.

Use it with other nutrition tools

A calorie-deficit target can make more sense when paired with calorie-needs, macro, and protein-planning tools.

FAQ

Common questions

How is the daily calorie target estimated here?

The calculator subtracts the daily calorie deficit entered from the maintenance calories entered to estimate a lower daily calorie target.

Why show weekly calorie deficit too?

Weekly total can make the daily target easier to understand and gives a rough sense of how the deficit adds up over time.

Why is this only a planning estimate?

Real calorie needs can change with body composition, training, recovery, medical needs, and how sustainable the calorie target is in practice.

Related tools

Keep comparing

Use these related tools to compare nearby scenarios, check a second estimate, or keep narrowing down the right decision.

Health ToolsUpdated April 11, 2026