Clinical Tools / Live calculator

Fluid bolus / shock dose calculator

Calculate a total shock dose reference and a selected partial bolus volume for dogs and cats using simple isotonic crystalloid arithmetic. This tool is an arithmetic reference only; it is not a treatment protocol.

Input

Enter the bolus reference

Select species and body weight, then choose the reference shock dose and the portion you want shown as a bolus volume.

Species Weight unit

Body weight Shock dose reference

Species reference Shock-dose unit

% of shock dose

Result

Bolus result

Enter the weight, shock-dose reference, and selected bolus percentage to calculate a total shock dose and partial bolus volume.

Awaiting calculation

Confirm species and body weight.
Review the intended shock-dose reference in mL/kg.
Select the bolus percentage you want shown.

Formula

Formula audit trail

1. Convert body weight to kg when weight is entered in lb.

2. Total shock dose = body weight x selected shock-dose reference.

3. Selected bolus volume = total shock dose x chosen percentage / 100.

4. Bolus equivalent in mL/kg = selected shock-dose reference x chosen percentage / 100.

Rounding is for display only. The output is a transparent arithmetic reference, not a treatment protocol.

Calculation steps will appear here for verification.

Safety checks

Review before use

Arithmetic reference only.
This page does not choose when or whether a bolus should be given.
Verify the final plan against patient reassessment and current protocol.
Reassess perfusion parameters between boluses per current protocol.

Quick reference

Fluid bolus use in dogs and cats (quick reference)

A fluid bolus is sometimes used when perfusion is poor and rapid intravascular volume support is being evaluated.
Shock dose is a reference estimate for the full isotonic crystalloid volume associated with severe hypoperfusion.
Boluses are often given in fractions so response, tolerance, and changing clinical findings can be checked before more fluid is considered.
Reassessment between boluses matters because perfusion, lung sounds, effort, and overall patient status can change quickly.
Use the fluid bolus calculator above for exact math.

Basis

Basis and limits

Calculation basis: total shock dose = body weight x selected mL/kg reference. Selected bolus volume = total shock dose x chosen percentage.

This tool provides arithmetic estimates based on commonly used veterinary formulas and reference values. It does not select treatments or replace clinical judgment. Always verify values against current protocols and product labels before use.

Reference ranges and approaches align with standard veterinary resources (e.g., emergency and internal medicine references such as Merck Veterinary Manual and common clinical guidelines).