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Start free. Connect more with Pro.

Choose the tools that fit your workflow. Core calculators stay free, and one Pro plan includes every advanced tool.

Free

$0

Everyday core calculations. No account required.

  • Body Weight Reference core methods
  • Estimated Needs: Mifflin-St Jeor and kcal/kg
  • Pediatric Growth Assessment: WHO and CDC references
  • Unit conversions and quick converter
  • Formula details, sources, and chart-note drafts
  • Copy and Print / Save PDF
Open free calculators

RDCalc Pro

14-day trial · No card required

$12/month

Billed $12 monthly. Flexible access to all Pro tools. USD.

  • Everything in Free, plus advanced weight and energy methods
  • Connected Nutrition Workflow with one combined note
  • Pediatric needs, catch-up, feeding, and connected workflow
  • Tube Feeding Regimen Analysis and A/B comparison
  • Additional daily sources and target coverage
  • Premix PN with optional separate lipid analysis
  • 2023 DRI Energy Requirements, pregnancy, and lactation
  • My Formulas: saved product labels and favorites
Start free trial

Eligible new subscribers get a 14-day trial with no card required. Add payment details to begin paid billing after the trial, or Pro ends automatically. Paid plans renew at the selected price unless canceled through Account → Manage billing.

Review each calculation before documentation. Professional use · Subscriptions, trials, and cancellation