Estimate maintenance before creating a deficit
Start with BMR, then apply an activity level to estimate TDEE. Avoid counting the same exercise twice through both a high activity multiplier and separate exercise calories.
Choose a deficit you can maintain
A larger mathematical deficit is not automatically a better plan. Food quality, hunger, training performance, recovery, sleep, and medical needs affect what is sustainable.
Use the calculator as a feedback loop
Track intake and body-weight trends consistently, then adjust gradually if the observed trend differs from the estimate. Short-term water changes can obscure fat loss or gain.
Test your scenario
Use the related calculators
The guide frames the comparison; the calculators let you enter your own numbers and test alternatives.