Measure consistently
Choose the DRI activity category conservatively and use measured height and weight. A label cannot capture every movement, occupation or training pattern.
Total daily energy equation comparison
Lead with the 2023 DRI energy equation, then audit common methods.
Calculate 2023 National Academies Estimated Energy Requirement across four activity categories and compare it with Mifflin, revised Harris–Benedict and optional Katch multiplier estimates.
The calculation runs locally in this browser. Educational outputs do not replace professional assessment, diagnosis, treatment or emergency care.
Method and interpretation guide
Use the TDEE result as a transparent estimate
Choose the DRI activity category conservatively and use measured height and weight. A label cannot capture every movement, occupation or training pattern. The worksheet exposes its assumptions so the result can be checked instead of accepted as a black box.
Read the assumptions
The 2023 DRI equations estimate total energy directly. Multiplying BMR equations by activity factors is shown only as a common heuristic comparison, not part of the original BMR research.
Escalate important decisions
A calculator cannot examine symptoms, medical history, medication effects or measurement quality. Use qualified professional guidance when the decision has health consequences.
Local calculation
Inputs are processed in this browser. No account or external calculator is required to produce the result.
False precision
Extra decimal places do not remove biological variation, input error or limits in the underlying population equation.
Scope
The 2023 DRI equations estimate total energy directly. Multiplying BMR equations by activity factors is shown only as a common heuristic comparison, not part of the original BMR research.
Simple by design
Three steps to a clearer number.
Enter your details
Use realistic values in each field. You can change them anytime.
Calculate instantly
The formula runs locally, so there is no account or waiting time.
Use the result
Treat the answer as a practical estimate for your next decision.