Activity multiplier

Tool id: activity-multiplier · Methods: lookup, neat-eat

Produce the activity multiplier that TDEE needs; reach for it when the coarse activity levels don’t fit and you want to model non-exercise vs exercise activity separately.

Input

Field	Type	Notes
activity_level	level | null	"sedentary", "light", "moderate", "active", "very_active" — needed for lookup
bmr	number | null	kcal/day — needed for neat-eat
weight	{ value, unit } | null	kg or lb — needed for neat-eat
sessions_per_week	integer | null	0–21 — needed for neat-eat
session_minutes	number | null	1–600 — needed for neat-eat
intensity	level | null	"low", "moderate", "high", "very_high" — needed for neat-eat
steps_per_day	integer | null	0–100000 — one of steps_per_day or occupation required for neat-eat
occupation	level | null	"sedentary", "light", "moderate", "heavy" — alternative to steps_per_day
methods	string[] | "all"	defaults to "all"

Methods

• lookup — The classic activity-factor table (sedentary → very active). Fast; requires only activity_level.
• neat-eat — Models non-exercise activity (NEAT, from occupation or daily steps) plus exercise activity (EAT, from training volume and intensity) separately. The resulting multiplier is (bmr + neat + eat) / bmr.

The multiplier returned by this tool feeds directly into the activity field of the tdee tool.

Example

TypeScript

import { REGISTRY } from "@almostjacked/fitness-tools";
const am = REGISTRY.get("activity-multiplier")!;
am.compute(am.input.parse({
  activity_level: "moderate",
}));

curl

curl -s localhost:8080/v1/tools/activity-multiplier \
  -X POST -H 'content-type: application/json' \
  -d '{"activity_level":"moderate"}'

MCP

Call the activity-multiplier tool with these arguments:

{
  "activity_level": "moderate"
}

{
  results: [
    { method: "lookup", value: 1.55, unit: "x", detail: null },
  ],
  consensus: { mean: 1.55, median: 1.55, min: 1.55, max: 1.55, n: 1 },
  skipped: [
    {
      method: "neat-eat",
      reason: "neat-eat: requires bmr, weight, sessions_per_week, session_minutes, intensity, and steps_per_day or occupation",
    },
  ],
}

Call it another way

Full docs for the other protocols: HTTP API · MCP server.