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Calcimator

Phosphate Binder Dosing Calculator

Binder dose from dietary phosphorus and target level.

Inputs

Results

Tablets per Day

13.1

Tablets per Meal4.4
Phosphorus to Bind841 mg/day
Calcium from Binders0 mg/day
Dialysis Removal107 mg/day
Calcium Load Exceeded0
How to Use This Calculator
  1. Enter estimated daily dietary phosphorus intake (mg/day) and current serum phosphorus (mg/dL).
  2. Enter target serum phosphorus (mg/dL): KDIGO target is 3.5-5.5 mg/dL for dialysis patients.
  3. Select the binder type: calcium carbonate, calcium acetate, sevelamer, or lanthanum.
  4. Enter dialysis sessions per week and meals per day.
  5. Read daily tablet count and tablets per meal to guide prescribing.
  6. Monitor calcium from binders (mg/day): KDIGO recommends a maximum of 1500 mg/day from calcium-based binders.

How the result changes with Dietary Phosphorus (mg/day)

Dietary Phosphorus (mg/day)Tablets per Day
5004.3
1,75020.1
3,25039.2
4,50055

What each input means

Dietary Phosphorus (mg/day)
Estimated daily dietary phosphorus intake. CKD diet typically restricted to 800-1000mg.
Current Serum Phosphorus (mg/dL)
Current serum phosphorus level.
Target Serum Phosphorus (mg/dL)
KDIGO target: 3.5-5.5 mg/dL for dialysis patients.
Binder Type
Select phosphate binder type.
Dialysis Sessions/Week
Number of hemodialysis sessions per week.
Meals per Day
Number of meals per day (binders taken with meals).

What each result means

Tablets per Day
Estimated daily binder tablet count.
Tablets per Meal
Tablets to take with each meal.
Phosphorus to Bind
Net daily phosphorus requiring binder absorption.
Calcium from Binders
Elemental calcium from calcium-based binders. KDIGO: max 1500mg/day.
Dialysis Removal
Average daily phosphorus removed by dialysis.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Dietary Phosphorus (mg/day) = 1200, Current Serum Phosphorus (mg/dL) = 7, Target Serum Phosphorus (mg/dL) = 4.5, Binder Type = 3 = 6 input(s) provided
  2. Calculate Tablets per Day
    Tablets per Day
    13.1 = 13.1
  3. Calculate Tablets per Meal
    Tablets per Meal = tabletsPerDay / mealsPerDay
    4.4 = 4.4
  4. Calculate Phosphorus to Bind
    Phosphorus to Bind = netPhosphorusToManage * excessFactor
    841 = 841

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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