Medical Supply Planning Calculator
Class VIII medical supplies from casualty projections.
About this calculator
This calculator projects casualty rates and Class VIII medical supply requirements from unit size and an assumed daily casualty rate. Daily casualties is personnel count multiplied directly by the casualty rate per day (line 13), and the two inputs carry an identical share of that product -- doubling either one doubles the daily figure, with neither dominating the other. Total casualties over the planning period multiplies daily casualties by days of supply (line 14), so days of supply joins personnel count and casualty rate as an equal contributor once the total, rather than the daily figure, is the output in view.
Every downstream supply figure -- medical supply weight, blood units, litters, and ambulance loads -- is a fixed multiple of total casualties (60 lb/casualty at line 17, four blood units per trauma casualty at lines 20-21, 1.2 litters per casualty at line 24, one ambulance load per four casualties at line 27), so they all move in lockstep with whatever moves total casualties. Evacuation time (hours) is collected as an input, but it never appears in a formula anywhere in the calculate function -- only in the identify-parameters step text (line 54) -- so changing it does not change any projected casualty count or supply figure under the current model. The casualty rate is clamped between 0 and 10 percent per day and does not model surges, mass-casualty events, or medical evacuation capacity limits.
Safety Notice
This calculator provides estimates only. Always follow manufacturer guidelines, industry standards, and applicable safety codes. Incorrect application of these calculations could result in injury or property damage. When in doubt, consult a qualified professional.
Inputs
Results
Daily casualties
1
How to Use This Calculator
- Enter the total personnel supported and days of supply for the planning period — both carry equal weight alongside casualty rate in the casualty projection.
- Set the casualty rate per day (e.g., 0.002 = 0.2% per person per day) based on threat assessment; this and personnel count are the only two inputs that drive Daily casualties.
- Enter evacuation time (hours) for your own MEDEVAC planning reference; the current calculation does not factor it into any casualty or supply figure.
- Review Daily casualties and Total casualties to size medical staffing and assets.
- Use Medical supplies (lb), Blood units, Litters, and Ambulance loads — all fixed multiples of Total casualties — for Class VIII planning and ambulance tasking.
How the result changes with Personnel
| Personnel | Daily casualties |
|---|---|
| 250 | 0.5 |
| 375 | 0.75 |
| 750 | 1.5 |
| 1,250 | 2.5 |
What each input means
- Personnel
- Total supported personnel.
- Days of supply
- Planning duration in days.
- Casualty rate/day
- Expected casualty rate per person per day.
- Evacuation time (hrs)
- Average time to evacuate a casualty.
What each result means
- Daily casualties
- Expected casualties per day.
- Total casualties
- Total expected casualties over period.
- Medical supplies (lb)
- Total Class VIII supply weight.
- Blood units
- Blood product units needed.
- Litters needed
- Patient litters including spares.
- Ambulance loads
- Ground ambulance evacuation loads.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersPersonnel = 500, Days of supply = 15, Casualty rate/day = 0.002, Evacuation time (hrs) = 4 = 4 input(s) provided
- Calculate Daily casualtiesDaily casualties = round(personnelCount * casualtyRatePerDay * 100) / 1001 = 1
- Calculate Total casualtiesTotal casualties = round(dailyCasualties * daysOfSupply)15 = 15
- Calculate Medical suppliesMedical supplies = totalExpectedCasualties * 60900 = 900
Engine last updated . Checked against 3 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
Does evacuation time change my casualty or supply projections?
No, not under the current model. Evacuation time (hours) is an input field, but no formula in the calculate function reads it -- it appears only in the identify-parameters step text (line 54), never in the daily casualties, total casualties, or any supply-quantity calculation. Changing it from 1 hour to 72 hours leaves every output identical.
Do personnel count and casualty rate matter equally for daily casualties?
Yes. Daily casualties is personnel count multiplied directly by casualty rate per day (line 13), with no other input in the formula. A given percentage change to either personnel count or casualty rate moves Daily casualties by that same percentage -- there is no single input that carries more weight than the other.
Does extending the planning period change more than just the total?
Days of supply only enters the calculation once daily casualties is multiplied out to a total (line 14); it has zero effect on the Daily casualties figure itself. But because Total casualties feeds every downstream supply quantity -- medical supplies, blood units, litters, ambulance loads -- extending the period from 15 to 45 days triples every one of those figures along with the total.
How are blood units, litters, and ambulance loads derived from casualties?
Each is a fixed multiple of total casualties: blood units assumes 40 percent of casualties are trauma cases needing 4 units each (lines 20-21), litters adds a 20 percent spare margin on top of one litter per casualty (line 24), and ambulance loads assumes four litter patients per ambulance (line 27). None of the three references personnel count, casualty rate, or days of supply directly -- they all move only through total casualties.
Related Calculators
The questions that sit next to this one — chosen by subject, including calculators filed under a different category.
Supply Class Calculator
Supply tonnage by class from unit size and intensity.
Military LogisticsRations Calculator
Field rations by type, personnel, and days of supply.
Military LogisticsDeployment Cost Calculator
Total deployment cost from personnel, duration, and equipment weight.
Military PlanningWater Purification Calculator
Calculate water purification capacity requirements from unit size, consumption rate, and water source quality.
Military PlanningFuel Consumption Calculator
Calculate fuel planning requirements from vehicle types, distance, terrain, and idle time for military logistics.
More in Military & Defence Planning.