Eight tools · no generic fallbacks

Choose a useful calculation.

Every route below has its own inputs, method, example and result logic. Unknown tool URLs return a real 404.

Maintenance & energy needs

Estimate resting energy and a deliberately broad maintenance range, with an optional 14-day reality check.

Turn an active-adult daily protein range into a practical three-to-six-meal distribution.

Build a conservative before, during and after-training template from session demands and timing.

Scale US or EU/UK label values to the amount eaten and show the reference-value arithmetic.

Add drink-label values across servings while keeping total sugar, known added sugar and calories distinct.

Total caffeine from several sources, calculate mg/kg and place the last dose in bedtime context.

Summarise seven nights against a chosen target and view shortfall, extra hours and trend separately.

Turn servings, pantry stock, pack sizes and a budget into an editable shopping checklist.