Free
Body Weight Reference
Calculate reference weight, BMI, %IBW, adjusted/nutritional body weight, and weight history with a concise chart-note draft.
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RDCalc calculators
Faster clinical nutrition calculations. Cleaner RD chart notes.
RDCalc helps dietitians complete clinical nutrition calculations, review assumptions, and generate concise chart-note drafts without storing PHI.
Transparent formulas
Professional-use guardrails
No PHI required
Calculators
Currently supported calculators
Start with free core calculators for adult assessment workflows. RDCalc Pro adds nutrition-support workflows for tube feeding and PN review.
Free + Pro methods
Estimated Needs Calculator
Estimate adult energy, protein, and fluid needs with free core methods and Pro advanced methods.
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Pro
Tube Feeding Regimen Analysis
Review tube-feeding formula provision, flushes, total water, and estimated needs coverage with a concise chart-note draft.
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Pro · internal review
Parenteral Nutrition Regimen Analysis
Review adult PN/TPN regimen details from user-entered custom component or premix label values. RD/pharmacy review required.
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Pro · internal review
Renal Nutrition Needs Review
Adult CKD non-dialysis weight-basis documentation support for internal review. Nutrition targets remain pending clinical approval.
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Documentation workflow
Built around RD documentation workflow
RDCalc keeps the calculation, assumptions, and note draft in one reviewable flow so RDs can move faster without hiding the math.
1
Enter RD-focused inputs
Use common clinical nutrition fields with units, guardrails, and workflow sections built around documentation.
2
Review formula details
Check calculated outputs alongside assumptions, rounding notes, source context, and professional-use cautions.
3
Copy a note draft
Generate concise chart-note text that can be reviewed, edited, and pasted into the RD documentation workflow.
Trust and auditability
Why RDCalc is different
Most calculator sites stop at the number. RDCalc keeps formulas, assumptions, and chart-note wording reviewable before anything is copied.
- Built around RD documentation workflow, not generic wellness math.
- Formula details and assumptions stay visible before copying a note.
- Chart-note drafts preserve readable line breaks for faster documentation.
- No patient names, MRNs, or PHI are required or stored.
- Free core calculators. Pro nutrition-support workflows.
Free + Pro
Free core calculators. Advanced workflows with RDCalc Pro.
Body Weight Reference and core Estimated Needs remain free to use without an account. RDCalc Pro unlocks implemented advanced methods and nutrition-support workflows, with a 14-day trial available.
Professional-use note
Calculation aids for professional review
RDCalc is intended for qualified nutrition and healthcare professionals. Outputs should be reviewed against clinical judgment, formula labels, patient-specific context, provider orders, and local or institutional policy.
Future workflow areas
Additional RD-reviewed workflows may follow
Future areas will be added only when workflow scope, assumptions, warnings, and review needs are clear.
Tube feeding comparisonFree-water / flush gap supportModular tube feeding supportMalnutrition documentation supportRefeeding risk reviewRenal nutritionWound / pressure injuryPediatricsPregnancy / lactation