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What is my calorie surplus?

What is my calorie surplus: calculation method, required inputs, worked check, limitations and a link to Calorie Calculator. Reviewed 25 September 2026.

By Uddhav Gopani, FounderPublished 25 September 2026Reviewed 25 September 2026

For “What is my calorie surplus”, the linked Calorie Calculator is relevant because Estimate a daily calorie target for losing, maintaining, or gaining weight.

What this specific question is asking

Each input for this calculation has to mean the same thing on your side as it does in Calorie Calculator: check that weight (kg), height (cm), age (years), sex, activity level and goal are entered in the units and periods the tool expects, then read the output with those same units attached.

Test the setup before trusting the output: rerun the example with a doubled weight (kg) and see whether the result behaves as the formula implies. Direction first, precision second.

Inputs to verify

Verify weight (kg) before calculation; if this value uses a different unit, period or definition, convert or restate it first.
Verify height (cm) before calculation; if this value uses a different unit, period or definition, convert or restate it first.
Verify age (years) before calculation; if this value uses a different unit, period or definition, convert or restate it first.
Verify sex before calculation; if this value uses a different unit, period or definition, convert or restate it first.
Verify activity level before calculation; if this value uses a different unit, period or definition, convert or restate it first.
Verify goal before calculation; if this value uses a different unit, period or definition, convert or restate it first.

Step-by-step check

Enter your weight, height, and age first.
Pick your sex and activity level.
Choose whether you want to lose, maintain, or gain.
Press Calculate to see your daily calorie target.

Worked example and sanity check

As a worked reference for “What is my calorie surplus”, Worked example Maintenance calories = BMR × an activity factor. With a BMR of 1,500 kcal and a 'lightly active' factor of 1.375, daily maintenance is ≈ 2,063 kcal . A moderate 500 kcal deficit (~1,563 kcal) is often used as a starting point for gradual change. Individual needs vary widely — treat this as a rough guide and consult a qualified professional for a personalised plan.

Interpreting the result

Interpretation starts with magnitude. The worked example landed at my calorie surplus”, Worked example Maintenance calories = B; compare yours before trusting the decimals. If the two disagree wildly, the setup — usually weight (kg)'s unit or period — is the suspect. Read the magnitude before the decimals: a result ten times too large or small almost always means a unit or period slipped, not that the formula failed.

Reviewed 25 September 2026

Verify any current tax threshold, lender rate, provider rule or health guidance with the authoritative source before acting.

Use the Calorie Calculator

Open Calorie Calculator

Common questions

Which inputs matter most for what is my calorie surplus?

The key inputs are Weight (kg), Height (cm), Age (years), Sex. Match their units and periods before using Calorie Calculator.

How can I check an answer for what is my calorie surplus?

Reproduce the worked example with its stated inputs first, then change weight (kg) by a known amount and confirm the output moves the way the relationship predicts. Only then substitute your own values.

When should I recalculate what is my calorie surplus?

Re-run it when the real-world inputs move — new measurements, changed rates or thresholds, or a different unit convention on the same quantity.